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NDQ_012445 | what is the role of the trna molecules? | a. the trna determines the order of the amino acids in the protein, b. the trna reads the mrna code and brings a specific amino acid to the, c. the trna brings the genetic message to the ribosome from the nucleus, d. all of the above | b | Lesson: translation of rna to protein
Translation:
The mRNA, which is transcribed from the DNA in the nucleus, carries the directions for the protein-making process. mRNA tells the ribosome ( Figure 1.1) how to create a specific protein. Ribosomes translate RNA into a protein with a specific amino acid sequence. The t... |
NDQ_012446 | what is the sequence of the anticodon that binds to a cua codon? | a. gau, b. gat, c. cua, d. cta | a | Lesson: translation of rna to protein
Translation:
The mRNA, which is transcribed from the DNA in the nucleus, carries the directions for the protein-making process. mRNA tells the ribosome ( Figure 1.1) how to create a specific protein. Ribosomes translate RNA into a protein with a specific amino acid sequence. The t... |
NDQ_012447 | which of the following statements concerning codons is true? | a. codons are read in the ribosome, b. codons are found in the mrna sequence, c. codons consist of three rna bases, d. all of the above statements are true | d | Lesson: translation of rna to protein
Translation:
The mRNA, which is transcribed from the DNA in the nucleus, carries the directions for the protein-making process. mRNA tells the ribosome ( Figure 1.1) how to create a specific protein. Ribosomes translate RNA into a protein with a specific amino acid sequence. The t... |
NDQ_012448 | ggg codes for glycine and ccc codes for proline. if the sequence within a gene is ggggggcccgggccc, what is the amino acid sequence of the corresponding protein? | a. gly-gly-pro-gly-pro, b. pro-pro-gly-pro-gly, c. gly-gly-pro-pro-gly, d. pro-pro-gly-gly-pro | b | Lesson: translation of rna to protein
Translation:
The mRNA, which is transcribed from the DNA in the nucleus, carries the directions for the protein-making process. mRNA tells the ribosome ( Figure 1.1) how to create a specific protein. Ribosomes translate RNA into a protein with a specific amino acid sequence. The t... |
NDQ_012479 | not all echinoderms have the ability to move around. | a. true, b. false | a | Lesson: types of echinoderms
Types of Echinoderms:
The echinoderms can be divided into two major groups: 1. Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. 2. Pelmatozoa are the immobile echinoderms. This group includes crinoids, such as the feather stars. L... |
NDQ_012480 | sand dollars can be found both in the ocean and on land. | a. true, b. false | b | Lesson: types of echinoderms
Types of Echinoderms:
The echinoderms can be divided into two major groups: 1. Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. 2. Pelmatozoa are the immobile echinoderms. This group includes crinoids, such as the feather stars. L... |
NDQ_012484 | which is a characteristic of a starfish? | a. capture prey for their own food, b. bottom feeders with long, narrow arms, c. have movable spines, d. armless and elongated | a | Lesson: types of echinoderms
Types of Echinoderms:
The echinoderms can be divided into two major groups: 1. Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. 2. Pelmatozoa are the immobile echinoderms. This group includes crinoids, such as the feather stars. L... |
NDQ_012485 | which is a characteristic of a brittle star? | a. capture prey for their own food, b. bottom feeders with long, narrow arms, c. have movable spines, d. armless and elongated | b | Lesson: types of echinoderms
Types of Echinoderms:
The echinoderms can be divided into two major groups: 1. Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. 2. Pelmatozoa are the immobile echinoderms. This group includes crinoids, such as the feather stars. L... |
NDQ_012486 | which echinoderms are able to move relatively quickly? | a. sea cucumbers, b. sand dollars, c. asteroids, d. brittle stars | d | Lesson: types of echinoderms
Types of Echinoderms:
The echinoderms can be divided into two major groups: 1. Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. 2. Pelmatozoa are the immobile echinoderms. This group includes crinoids, such as the feather stars. L... |
NDQ_012487 | which echinoderms have movable spines? | a. sand dollars, b. starfish, c. sea cucumbers, d. brittle stars | a | Lesson: types of echinoderms
Types of Echinoderms:
The echinoderms can be divided into two major groups: 1. Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. 2. Pelmatozoa are the immobile echinoderms. This group includes crinoids, such as the feather stars. L... |
NDQ_012488 | echinoderms that cannot move include | a. feather stars, b. starfish, c. sand dollars, d. none of the above | a | Lesson: types of echinoderms
Types of Echinoderms:
The echinoderms can be divided into two major groups: 1. Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. 2. Pelmatozoa are the immobile echinoderms. This group includes crinoids, such as the feather stars. L... |
NDQ_012498 | vegetable oil, olive oil, and nuts are good sources of carbohydrates. | a. true, b. false | b | Lesson: types of nutrients
Nutrients:
Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your body can use it.
Carbohydrates:
Carbohydrates are nutrients that include sugars, starches, and fiber. There are two ... |
NDQ_012499 | unsaturated lipids are needed in small amounts for good health. | a. true, b. false | a | Lesson: types of nutrients
Nutrients:
Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your body can use it.
Carbohydrates:
Carbohydrates are nutrients that include sugars, starches, and fiber. There are two ... |
NDQ_012503 | what makes up the membrane that surrounds cells? | a. carbohydrates, b. lipids, c. proteins, d. amino acids | b | Lesson: types of nutrients
Nutrients:
Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your body can use it.
Carbohydrates:
Carbohydrates are nutrients that include sugars, starches, and fiber. There are two ... |
NDQ_012504 | most lipids in your diet should be | a. trans fats, b. saturated fats, c. unsaturated fats, d. none, your diet should not contain any lipid | c | Lesson: types of nutrients
Nutrients:
Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your body can use it.
Carbohydrates:
Carbohydrates are nutrients that include sugars, starches, and fiber. There are two ... |
NDQ_012505 | which statement is associated with starch? | a. starches are found in vegetables and grains, b. starch is made of thousands of glucose monomers, c. starch is a large, complex carbohydrate, d. all of the above describe starch | d | Lesson: types of nutrients
Nutrients:
Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your body can use it.
Carbohydrates:
Carbohydrates are nutrients that include sugars, starches, and fiber. There are two ... |
NDQ_012506 | why are complex carbohydrates better than simple carbohydrates? | a. they have carbohydrates that are good for you, b. they provide energy longer and more steadily, c. they are found in fruit, d. all of the above | b | Lesson: types of nutrients
Nutrients:
Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your body can use it.
Carbohydrates:
Carbohydrates are nutrients that include sugars, starches, and fiber. There are two ... |
NDQ_012507 | what type of nutrient is fiber? | a. carbohydrate, b. lipid, c. protein, d. unsaturated fat | a | Lesson: types of nutrients
Nutrients:
Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your body can use it.
Carbohydrates:
Carbohydrates are nutrients that include sugars, starches, and fiber. There are two ... |
NDQ_012508 | the urinary system is the same as the excretory system. | a. true, b. false | b | Lesson: urinary system
The Urinary System:
Sometimes, the urinary system ( Figure 1.1) is called the excretory system. But the urinary system is only one part of the excretory system. Recall that the excretory system is also made up of the skin, lungs, and large intestine, as well as the kidneys. The urinary system is... |
NDQ_012509 | urine is mostly water. | a. true, b. false | a | Lesson: urinary system
The Urinary System:
Sometimes, the urinary system ( Figure 1.1) is called the excretory system. But the urinary system is only one part of the excretory system. Recall that the excretory system is also made up of the skin, lungs, and large intestine, as well as the kidneys. The urinary system is... |
NDQ_012513 | what brings urine from the kidneys to the urinary bladder? | a. the urine tubes, b. the ureters, c. the urethra, d. the kidney tubes | b | Lesson: urinary system
The Urinary System:
Sometimes, the urinary system ( Figure 1.1) is called the excretory system. But the urinary system is only one part of the excretory system. Recall that the excretory system is also made up of the skin, lungs, and large intestine, as well as the kidneys. The urinary system is... |
NDQ_012514 | what is the organ that collects urine? | a. the kidneys, b. the ureters, c. the urinary bladder, d. the urinary container | c | Lesson: urinary system
The Urinary System:
Sometimes, the urinary system ( Figure 1.1) is called the excretory system. But the urinary system is only one part of the excretory system. Recall that the excretory system is also made up of the skin, lungs, and large intestine, as well as the kidneys. The urinary system is... |
NDQ_012515 | urine leaves the body through the | a. ureter, b. bladder, c. urethra, d. kidneys | c | Lesson: urinary system
The Urinary System:
Sometimes, the urinary system ( Figure 1.1) is called the excretory system. But the urinary system is only one part of the excretory system. Recall that the excretory system is also made up of the skin, lungs, and large intestine, as well as the kidneys. The urinary system is... |
NDQ_012516 | which organ is not part of the urinary system? | a. the kidney, b. the ribcage, c. the urethra, d. the bladder | b | Lesson: urinary system
The Urinary System:
Sometimes, the urinary system ( Figure 1.1) is called the excretory system. But the urinary system is only one part of the excretory system. Recall that the excretory system is also made up of the skin, lungs, and large intestine, as well as the kidneys. The urinary system is... |
NDQ_012517 | which organ is not part of the excretory system? | a. the kidney, b. the lungs, c. the heart, d. the large intestine | c | Lesson: urinary system
The Urinary System:
Sometimes, the urinary system ( Figure 1.1) is called the excretory system. But the urinary system is only one part of the excretory system. Recall that the excretory system is also made up of the skin, lungs, and large intestine, as well as the kidneys. The urinary system is... |
NDQ_012548 | about 1 of every 2 people need some sort of vision correction. | a. true, b. false | a | Lesson: vision correction
Vision Correction:
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Myopia:
Myopia is also called nearsightedness. It affe... |
NDQ_012549 | signs of myopia usually begin in childhood. | a. true, b. false | a | Lesson: vision correction
Vision Correction:
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Myopia:
Myopia is also called nearsightedness. It affe... |
NDQ_012553 | an object is focused in front of the retina. this person has | a. myopia, b. hyperopia, c. nearsightedness, d. both a and c | d | Lesson: vision correction
Vision Correction:
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Myopia:
Myopia is also called nearsightedness. It affe... |
NDQ_012554 | an object is focused in back of the retina. this person has | a. myopia, b. hyperopia, c. nearsightedness, d. both a and c | b | Lesson: vision correction
Vision Correction:
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Myopia:
Myopia is also called nearsightedness. It affe... |
NDQ_012555 | common signs of myopia include | a. difficulty in maintaining a clear focus on close objects, b. difficulty is seeing the whiteboard at school, c. headaches after close work, d. all of the above | b | Lesson: vision correction
Vision Correction:
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Myopia:
Myopia is also called nearsightedness. It affe... |
NDQ_012556 | what is the main goal of corrective lenses? | a. the corrective lens changes the focus, so images move through the cornea, b. the corrective lens changes the focus, so images moves through the eye lens, c. the corrective lens changes the focus, so images move through the pupil, d. the corrective lens changes the focus, so images fall on the retina | d | Lesson: vision correction
Vision Correction:
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Myopia:
Myopia is also called nearsightedness. It affe... |
NDQ_012557 | people with myopia will usually need glasses or contact lenses when they | a. work at a computer, b. read a book, c. watch tv or drive a car, d. all of the above | c | Lesson: vision correction
Vision Correction:
You probably know people who need eyeglasses or contact lenses to see clearly. Maybe you need them yourself. Lenses are used to correct vision problems. Two of the most common vision problems are myopia and hyperopia.
Myopia:
Myopia is also called nearsightedness. It affe... |
NDQ_012558 | minerals are organic compounds. | a. true, b. false | b | Lesson: vitamins and minerals
Vitamins and Minerals:
Vitamins and minerals are also nutrients. They do not provide energy, but they are needed for good health.
Vitamins:
Vitamins are organic compounds that the body needs in small amounts to function properly. Humans need 13 different vitamins. Some of them are liste... |
NDQ_012559 | vitamins are a good source of energy. | a. true, b. false | b | Lesson: vitamins and minerals
Vitamins and Minerals:
Vitamins and minerals are also nutrients. They do not provide energy, but they are needed for good health.
Vitamins:
Vitamins are organic compounds that the body needs in small amounts to function properly. Humans need 13 different vitamins. Some of them are liste... |
NDQ_012563 | what minerals are needed for muscles and nerves to work normally? | a. potassium and phosphorus, b. potassium and sodium, c. calcium and phosphorus, d. calcium and magnesium | b | Lesson: vitamins and minerals
Vitamins and Minerals:
Vitamins and minerals are also nutrients. They do not provide energy, but they are needed for good health.
Vitamins:
Vitamins are organic compounds that the body needs in small amounts to function properly. Humans need 13 different vitamins. Some of them are liste... |
NDQ_012564 | what vitamin is important in blood clotting? | a. vitamin a, b. vitamin b9, c. vitamin c, d. vitamin k | d | Lesson: vitamins and minerals
Vitamins and Minerals:
Vitamins and minerals are also nutrients. They do not provide energy, but they are needed for good health.
Vitamins:
Vitamins are organic compounds that the body needs in small amounts to function properly. Humans need 13 different vitamins. Some of them are liste... |
NDQ_012565 | what vitamin can be found in foods like oranges, grapefruits, and broccoli? | a. vitamin a, b. vitamin c, c. vitamin d, d. vitamin k | b | Lesson: vitamins and minerals
Vitamins and Minerals:
Vitamins and minerals are also nutrients. They do not provide energy, but they are needed for good health.
Vitamins:
Vitamins are organic compounds that the body needs in small amounts to function properly. Humans need 13 different vitamins. Some of them are liste... |
NDQ_012566 | low levels of what mineral may cause osteoporosis? | a. calcium, b. magnesium, c. potassium, d. sodium | a | Lesson: vitamins and minerals
Vitamins and Minerals:
Vitamins and minerals are also nutrients. They do not provide energy, but they are needed for good health.
Vitamins:
Vitamins are organic compounds that the body needs in small amounts to function properly. Humans need 13 different vitamins. Some of them are liste... |
NDQ_012567 | what mineral can be found in bananas? | a. chloride, b. magnesium, c. phosphorus, d. potassium | d | Lesson: vitamins and minerals
Vitamins and Minerals:
Vitamins and minerals are also nutrients. They do not provide energy, but they are needed for good health.
Vitamins:
Vitamins are organic compounds that the body needs in small amounts to function properly. Humans need 13 different vitamins. Some of them are liste... |
NDQ_012761 | Acids turn blue litmus paper red. | a. true, b. false | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012762 | Which of the following substances has a pH greater than 7? | a. normal (clean) rain, b. orange juice, c. bananas, d. soap | d | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012763 | Sodium chloride is an example of a base. | a. true, b. false | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012764 | Acids produce hydrogen gas when they react with | a. salts, b. bases, c. water, d. metals | d | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012765 | Bases cannot conduct electricity. | a. true, b. false | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012766 | Properties of bases include | a. a sour taste, b. a slippery feel, c. the ability to conduct electricity, d. two of the above | d | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012767 | Which of the following acids is strongest? | a. sulfuric acid, b. lemon juice, c. acid rain, d. vinegar | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012768 | All acids are harmful. | a. true, b. false | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012769 | A strong acid has a high concentration of hydrogen ions. | a. true, b. false | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012770 | Products of a neutralization reaction include | a. hydroxide ions, b. hydrogen ions, c. water, d. two of the above | c | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012772 | The symbol pH represents acidity. | a. true, b. false | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012773 | Ammonia is a stronger base than is bleach. | a. true, b. false | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012775 | Acids are used to make fertilizer. | a. true, b. false | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012778 | Acid rain promotes rapid growth of plants. | a. true, b. false | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012780 | Normal (clean) rainwater has a pH of 7. | a. true, b. false | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012781 | Litmus is the only indicator for detecting acids and bases. | a. true, b. false | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012782 | type of chemical reaction in which an acid reacts with a base | a. acid, b. acidity, c. base, d. pH, e. salt, f. litmus, g. neutralization | g | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012783 | Acids have many important uses in industry. | a. true, b. false | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012784 | ionic compound that produces hydroxide ions when dissolved in water | a. acid, b. acidity, c. base, d. pH, e. salt, f. litmus, g. neutralization | c | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012785 | ionic compound formed when an acid and a base react | a. acid, b. acidity, c. base, d. pH, e. salt, f. litmus, g. neutralization | e | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012786 | When sodium hydroxide dissolves in water it forms hydrogen ions. | a. true, b. false | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012787 | concentration of hydrogen ions in a solution | a. acid, b. acidity, c. base, d. pH, e. salt, f. litmus, g. neutralization | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012788 | A neutral substance has a pH of 7. | a. true, b. false | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012789 | A salt forms when an acid and base react. | a. true, b. false | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012790 | ionic compound that produces hydrogen ions when dissolved in water | a. acid, b. acidity, c. base, d. pH, e. salt, f. litmus, g. neutralization | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012791 | measure of the acidity of a solution | a. acid, b. acidity, c. base, d. pH, e. salt, f. litmus, g. neutralization | d | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012792 | compound used to detect acids and bases | a. acid, b. acidity, c. base, d. pH, e. salt, f. litmus, g. neutralization | f | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012793 | Which of the following substances is an acid? | a. milk, b. bleach, c. ammonia, d. seawater | a | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012794 | A very strong base has a pH close to | a. 1, b. 5, c. 7, d. 14 | d | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012795 | Properties of acids include | a. a bitter taste, b. a slippery feel, c. the ability to conduct electricity, d. two of the above | c | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012796 | Which of the following ionic compounds forms an acid when dissolved in water? | a. KCl, b. HCl, c. NaCl, d. MgCl2 | b | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012797 | Bases are used to make all of the following products except | a. soap, b. concrete, c. deodorant, d. car batteries | d | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012798 | If a solution has a greater concentration of hydrogen ions than does pure water, then the solution | a. has a pH greater than 7, b. is a base, c. is an acid, d. two of the above | c | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012799 | Which of the following chemical equations represents a neutralization reaction? | a. NaOH + H2 O OH + Na+, b. Na+ + Cl NaCl, c. HCl + NaOH NaCl + H2 O, d. Mg + 2HCl H2 + MgCl2 | c | Lesson: acids and bases
Acids:
An acid is an ionic compound that produces positive hydrogen ions (H+ ) when dissolved in water. An example is hydrogen chloride (HCl). When it dissolves in water, its hydrogen ions and negative chloride ions (Cl ) separate, forming hydrochloric acid. This can be represented by the equat... |
NDQ_012807 | The scientist who discovered radioactivity was | a. Curie, b. Geiger, c. Becquerel, d. none of the above | c | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012810 | All nuclei that emit radiation are | a. radioactive, b. very large, c. unstable, d. two of the above | d | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012812 | The radioactive isotope of carbon is | a. carbon-12, b. carbon-13, c. carbon-14, d. none of the above | c | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012813 | Which combination of protons and neutrons would most likely result in a stable nucleus? | a. 4 protons and 2 neutrons, b. 4 protons and 4 neutrons, c. 4 protons and 6 neutrons, d. 4 protons and 8 neutrons | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012816 | Rocks may release radiation due to | a. formation of radioactive gas in the rocks, b. radioactive elements in the rocks, c. carbon-12 in the rocks, d. two of the above | d | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012821 | Some elements naturally change into different elements. | a. true, b. false | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012824 | Only unstable nuclei emit radiation. | a. true, b. false | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012826 | The radioactive isotope of carbon has fewer neutrons than other isotopes of carbon. | a. true, b. false | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012827 | Radon gas is harmful when it burns and causes pollution. | a. true, b. false | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012828 | Background radiation is generally considered to be safe for living things. | a. true, b. false | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012829 | There is no way to detect radiation. | a. true, b. false | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012830 | Radiation can break bonds in biochemical molecules. | a. true, b. false | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012831 | Radioactive isotopes can be used to determine the ages of fossils. | a. true, b. false | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012832 | Radiation is harmless to nonliving things such as metals. | a. true, b. false | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012833 | You cannot see radiation but you can always feel it. | a. true, b. false | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012834 | A single large exposure to radiation can burn the skin. | a. true, b. false | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012835 | Human activities are responsible for almost all the radiation in the environment. | a. true, b. false | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012836 | Radiation can be used to generate electricity. | a. true, b. false | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012837 | Any exposure to radiation causes burns and destroys blood cells. | a. true, b. false | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012838 | A Geiger counter works because radiation changes atoms of a gas to ions. | a. true, b. false | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012839 | radioactive gas that forms in rocks underground | a. radiation, b. background radiation, c. radioactivity, d. radon, e. radioisotope, f. Antoine Becquerel, g. Marie Curie | d | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012840 | scientist who discovered radioactivity | a. radiation, b. background radiation, c. radioactivity, d. radon, e. radioisotope, f. Antoine Becquerel, g. Marie Curie | f | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012841 | ability of an atomic nucleus to give off charged particles and energy | a. radiation, b. background radiation, c. radioactivity, d. radon, e. radioisotope, f. Antoine Becquerel, g. Marie Curie | c | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012842 | low level of radiation that occurs naturally in the environment | a. radiation, b. background radiation, c. radioactivity, d. radon, e. radioisotope, f. Antoine Becquerel, g. Marie Curie | b | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012843 | charged particles and energy emitted by an unstable nucleus | a. radiation, b. background radiation, c. radioactivity, d. radon, e. radioisotope, f. Antoine Becquerel, g. Marie Curie | a | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012844 | scientist who discovered polonium and radium | a. radiation, b. background radiation, c. radioactivity, d. radon, e. radioisotope, f. Antoine Becquerel, g. Marie Curie | g | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
NDQ_012845 | atom with an unstable nucleus that emits radiation | a. radiation, b. background radiation, c. radioactivity, d. radon, e. radioisotope, f. Antoine Becquerel, g. Marie Curie | e | Lesson: radioactivity
Introduction to Radioactivity:
Radioactivity is the ability of an atom to emit, or give off, charged particles and energy from the nucleus. The charged particles and energy are called by the general term radiation. Only unstable nuclei emit radiation. When they do, they gain or lose protons. Then... |
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