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NDQ_018587 | the larger a surface wave is, the more energy the wave has. | a. true, b. false | a | Lesson: surface wave
Waves on the Surface:
A surface wave is a wave that travels along the surface of a medium. The medium is the matter through which the wave travels. Ocean waves are the best-known examples of surface waves. They travel on the surface of the water between the ocean and the air. Q: What do you think ... |
NDQ_018588 | an ocean wave carries water all the way across the ocean to the opposite shore. | a. true, b. false | b | Lesson: surface wave
Waves on the Surface:
A surface wave is a wave that travels along the surface of a medium. The medium is the matter through which the wave travels. Ocean waves are the best-known examples of surface waves. They travel on the surface of the water between the ocean and the air. Q: What do you think ... |
NDQ_018591 | which of the following is not a synthesis reaction? | a. 2h2 + o2 2h2o, b. 2co + o2 2co2, c. 3h2 + n2 2nh3, d. mg + 2hcl mgcl2 + h2 | d | Lesson: synthesis reactions
What Is A Synthesis Reaction:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+BC In this equation, the letters A and B represent the reactants that begin the reaction, and the letter ... |
NDQ_018593 | the chemical equation 2no + o2 2no2 represents a synthesis reaction. | a. true, b. false | a | Lesson: synthesis reactions
What Is A Synthesis Reaction:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+BC In this equation, the letters A and B represent the reactants that begin the reaction, and the letter ... |
NDQ_018594 | the product of a synthesis reaction can be an element or a compound. | a. true, b. false | b | Lesson: synthesis reactions
What Is A Synthesis Reaction:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+BC In this equation, the letters A and B represent the reactants that begin the reaction, and the letter ... |
NDQ_018596 | examples of synthesis reactions include | a. 2k + cl2 2kcl, b. zn + 2hcl zncl2 + h2, c. cl2 + 2kbr 2kcl + br2, d. two of the above | a | Lesson: synthesis reactions
What Is A Synthesis Reaction:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+BC In this equation, the letters A and B represent the reactants that begin the reaction, and the letter ... |
NDQ_018601 | physical constraints on technological design include | a. scientific laws, b. ease of use, c. safety, d. cost | a | Lesson: technological design constraints
Constraints on Design:
The development of new technologywhether its a simple kite or a complex machineis called technological design. The technological design process is a step-by-step approach to finding a solution to a problem. Often, the main challenge in technological desig... |
NDQ_018630 | technology can have both positive and negative effects on people. | a. true, b. false | a | Lesson: technology and society
How Technology Affects Society:
Important new technologies such as the wheel have had a big impact on human society. Major advances in technol- ogy have influenced every aspect of life, including transportation, food production, manufacturing, communication, medicine, and the arts. Thats... |
NDQ_018634 | how did the industrial revolution affect society? | a. new cities grew up around factories, b. living conditions in cities improved, c. average income decreased, d. population size decreased | a | Lesson: technology and society
How Technology Affects Society:
Important new technologies such as the wheel have had a big impact on human society. Major advances in technol- ogy have influenced every aspect of life, including transportation, food production, manufacturing, communication, medicine, and the arts. Thats... |
NDQ_018663 | thermal conduction occurs more quickly in certain solids and liquids than in gases. | a. true, b. false | a | Lesson: thermal conductors and insulators
Thermal Conductors:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal conduction occurs when particles of warmer matter bump into particles of cooler matter and transfer some of their thermal energy to the cooler particles. Con... |
NDQ_018666 | good thermal conductors include | a. aluminum, b. plastic, c. wood, d. two of the above | a | Lesson: thermal conductors and insulators
Thermal Conductors:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal conduction occurs when particles of warmer matter bump into particles of cooler matter and transfer some of their thermal energy to the cooler particles. Con... |
NDQ_018667 | when you wear a down jacket, it prevents the transfer of cold from the outside air to your body. | a. true, b. false | b | Lesson: thermal conductors and insulators
Thermal Conductors:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal conduction occurs when particles of warmer matter bump into particles of cooler matter and transfer some of their thermal energy to the cooler particles. Con... |
NDQ_018668 | good thermal insulators include | a. air, b. styrofoam, c. iron, d. two of the above | d | Lesson: thermal conductors and insulators
Thermal Conductors:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal conduction occurs when particles of warmer matter bump into particles of cooler matter and transfer some of their thermal energy to the cooler particles. Con... |
NDQ_018671 | only matter that feels warm has thermal energy. | a. true, b. false | b | Lesson: thermal energy
What Is Thermal Energy:
Why do the air and sand of Death Valley feel so hot? Its because their particles are moving very rapidly. Anything that is moving has kinetic energy, and the faster it is moving, the more kinetic energy it has. The total kinetic energy of moving particles of matter is cal... |
NDQ_018673 | the thermal energy of matter depends on its | a. mass, b. temperature, c. number of particles, d. all of the above | d | Lesson: thermal energy
What Is Thermal Energy:
Why do the air and sand of Death Valley feel so hot? Its because their particles are moving very rapidly. Anything that is moving has kinetic energy, and the faster it is moving, the more kinetic energy it has. The total kinetic energy of moving particles of matter is cal... |
NDQ_018674 | an object with a lower temperature always has less thermal energy than an object with a warmer temperature. | a. true, b. false | b | Lesson: thermal energy
What Is Thermal Energy:
Why do the air and sand of Death Valley feel so hot? Its because their particles are moving very rapidly. Anything that is moving has kinetic energy, and the faster it is moving, the more kinetic energy it has. The total kinetic energy of moving particles of matter is cal... |
NDQ_018675 | which choice has the least thermal energy? | a. cup of hot cocoa, b. bathtub full of warm water, c. swimming pool full of cool water, d. all the water in earths oceans | a | Lesson: thermal energy
What Is Thermal Energy:
Why do the air and sand of Death Valley feel so hot? Its because their particles are moving very rapidly. Anything that is moving has kinetic energy, and the faster it is moving, the more kinetic energy it has. The total kinetic energy of moving particles of matter is cal... |
NDQ_018677 | the faster the particles of matter are moving, the greater their kinetic energy is. | a. true, b. false | a | Lesson: thermal energy
What Is Thermal Energy:
Why do the air and sand of Death Valley feel so hot? Its because their particles are moving very rapidly. Anything that is moving has kinetic energy, and the faster it is moving, the more kinetic energy it has. The total kinetic energy of moving particles of matter is cal... |
NDQ_018678 | the slower the particles of matter are moving, the lower their temperature is. | a. true, b. false | a | Lesson: thermal energy
What Is Thermal Energy:
Why do the air and sand of Death Valley feel so hot? Its because their particles are moving very rapidly. Anything that is moving has kinetic energy, and the faster it is moving, the more kinetic energy it has. The total kinetic energy of moving particles of matter is cal... |
NDQ_018679 | thermal energy is the total kinetic energy of moving particles of matter. | a. true, b. false | a | Lesson: thermal radiation
Introducing Thermal Radiation:
The bonfire from the opening image has a lot of thermal energy. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Thermal energy from the bonfire is transferred to the hands by thermal ra... |
NDQ_018683 | examples of thermal radiation include thermal energy traveling through | a. the air from a campfire to you, b. empty space from the sun to earth, c. a metal pan to water inside the pan, d. two of the above | d | Lesson: thermal radiation
Introducing Thermal Radiation:
The bonfire from the opening image has a lot of thermal energy. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Thermal energy from the bonfire is transferred to the hands by thermal ra... |
NDQ_018684 | no matter is required to transfer thermal energy by | a. conduction, b. convection, c. radiation, d. two of the above | c | Lesson: thermal radiation
Introducing Thermal Radiation:
The bonfire from the opening image has a lot of thermal energy. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Thermal energy from the bonfire is transferred to the hands by thermal ra... |
NDQ_018685 | only very hot objects radiate thermal energy. | a. true, b. false | b | Lesson: thermal radiation
Introducing Thermal Radiation:
The bonfire from the opening image has a lot of thermal energy. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Thermal energy from the bonfire is transferred to the hands by thermal ra... |
NDQ_018688 | life on earth depends on thermal energy radiated from the sun. | a. true, b. false | a | Lesson: thermal radiation
Introducing Thermal Radiation:
The bonfire from the opening image has a lot of thermal energy. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Thermal energy from the bonfire is transferred to the hands by thermal ra... |
NDQ_018690 | thomson won a nobel prize for his discovery of protons. | a. true, b. false | b | Lesson: thomsons atomic model
Thomson Discovers Electrons:
John Dalton discovered atoms in 1804. He thought they were the smallest particles of matter, which could not be broken down into smaller particles. He envisioned them as solid, hard spheres. It wasnt until 1897 that a scientist named Joseph John (J. J.) Thomso... |
NDQ_018694 | thomson knew that the particles he discovered were smaller than atoms because of their | a. charge, b. color, c. mass, d. volume | c | Lesson: thomsons atomic model
Thomson Discovers Electrons:
John Dalton discovered atoms in 1804. He thought they were the smallest particles of matter, which could not be broken down into smaller particles. He envisioned them as solid, hard spheres. It wasnt until 1897 that a scientist named Joseph John (J. J.) Thomso... |
NDQ_018697 | thomson thought that the positive charges in an atom were | a. concentrated in the nucleus, b. clumped into small clusters like plums, c. spread throughout the atom, d. none of the above | c | Lesson: thomsons atomic model
Thomson Discovers Electrons:
John Dalton discovered atoms in 1804. He thought they were the smallest particles of matter, which could not be broken down into smaller particles. He envisioned them as solid, hard spheres. It wasnt until 1897 that a scientist named Joseph John (J. J.) Thomso... |
NDQ_018698 | thomsons research proved daltons earlier claim about the smallest particles of matter. | a. true, b. false | b | Lesson: thomsons atomic model
Thomson Discovers Electrons:
John Dalton discovered atoms in 1804. He thought they were the smallest particles of matter, which could not be broken down into smaller particles. He envisioned them as solid, hard spheres. It wasnt until 1897 that a scientist named Joseph John (J. J.) Thomso... |
NDQ_018699 | all atoms are neutral in electric charge. | a. true, b. false | a | Lesson: transfer of electric charge
Transferring Electrons:
The girl pictured above became negatively charged because electrons flowed from the van de Graaff generator to her. Whenever electrons are transferred between objects, neutral matter becomes charged. This occurs even with individual atoms. Atoms are neutral i... |
NDQ_018701 | the formation of charged matter always depends on the transfer of electrons. | a. true, b. false | a | Lesson: transfer of electric charge
Transferring Electrons:
The girl pictured above became negatively charged because electrons flowed from the van de Graaff generator to her. Whenever electrons are transferred between objects, neutral matter becomes charged. This occurs even with individual atoms. Atoms are neutral i... |
NDQ_018702 | ways that matter can become electrically charged include | a. conduction, b. convection, c. radiation, d. all of the above | a | Lesson: transfer of electric charge
Transferring Electrons:
The girl pictured above became negatively charged because electrons flowed from the van de Graaff generator to her. Whenever electrons are transferred between objects, neutral matter becomes charged. This occurs even with individual atoms. Atoms are neutral i... |
NDQ_018704 | conduction occurs when you | a. touch a van de graaff generator, b. rub a balloon on your hair, c. reach toward a metal doorknob, d. two of the above | a | Lesson: transfer of electric charge
Transferring Electrons:
The girl pictured above became negatively charged because electrons flowed from the van de Graaff generator to her. Whenever electrons are transferred between objects, neutral matter becomes charged. This occurs even with individual atoms. Atoms are neutral i... |
NDQ_018706 | polarization occurs only when there is direct contact between two objects. | a. true, b. false | b | Lesson: transfer of electric charge
Transferring Electrons:
The girl pictured above became negatively charged because electrons flowed from the van de Graaff generator to her. Whenever electrons are transferred between objects, neutral matter becomes charged. This occurs even with individual atoms. Atoms are neutral i... |
NDQ_018707 | electrons are transferred whenever there is friction between materials that differ in their ability to give up or accept electrons. | a. true, b. false | a | Lesson: transfer of electric charge
Transferring Electrons:
The girl pictured above became negatively charged because electrons flowed from the van de Graaff generator to her. Whenever electrons are transferred between objects, neutral matter becomes charged. This occurs even with individual atoms. Atoms are neutral i... |
NDQ_018710 | of all known elements, transition metals make up about | a. 80 percent, b. 60 percent, c. 40 percent, d. 20 percent | b | Lesson: transition metals
What Are Transition Metals:
Transition metals are all the elements in groups 3-12 of the periodic table. In the periodic table pictured in Figure known elements. In addition to copper (Cu), well known examples of transition metals include iron (Fe), zinc (Zn), silver (Ag), and gold (Au) (Copp... |
NDQ_018711 | transition metals include | a. aluminum, b. barium, c. cobalt, d. all of the above | c | Lesson: transition metals
What Are Transition Metals:
Transition metals are all the elements in groups 3-12 of the periodic table. In the periodic table pictured in Figure known elements. In addition to copper (Cu), well known examples of transition metals include iron (Fe), zinc (Zn), silver (Ag), and gold (Au) (Copp... |
NDQ_018712 | which of the following is not a property of most transition metals? | a. malleability, b. ability to conduct electricity, c. ability to conduct heat, d. low melting point | d | Lesson: transition metals
What Are Transition Metals:
Transition metals are all the elements in groups 3-12 of the periodic table. In the periodic table pictured in Figure known elements. In addition to copper (Cu), well known examples of transition metals include iron (Fe), zinc (Zn), silver (Ag), and gold (Au) (Copp... |
NDQ_018715 | transition metals are high in density and very hard. | a. true, b. false | a | Lesson: transition metals
What Are Transition Metals:
Transition metals are all the elements in groups 3-12 of the periodic table. In the periodic table pictured in Figure known elements. In addition to copper (Cu), well known examples of transition metals include iron (Fe), zinc (Zn), silver (Ag), and gold (Au) (Copp... |
NDQ_018716 | most transition metals are dull and brown in color. | a. true, b. false | b | Lesson: transition metals
What Are Transition Metals:
Transition metals are all the elements in groups 3-12 of the periodic table. In the periodic table pictured in Figure known elements. In addition to copper (Cu), well known examples of transition metals include iron (Fe), zinc (Zn), silver (Ag), and gold (Au) (Copp... |
NDQ_018719 | a mechanical wave is a wave that travels through matter. | a. true, b. false | a | Lesson: transverse wave
What Is a Transverse Wave:
A transverse wave is a wave in which particles of the medium vibrate at right angles, or perpendicular, to the direction that the wave travels. Another example of a transverse wave is the wave that passes through a rope with you shake one end of the rope up and down, ... |
NDQ_018724 | the matter a mechanical wave travels through is called the medium. | a. true, b. false | a | Lesson: transverse wave
What Is a Transverse Wave:
A transverse wave is a wave in which particles of the medium vibrate at right angles, or perpendicular, to the direction that the wave travels. Another example of a transverse wave is the wave that passes through a rope with you shake one end of the rope up and down, ... |
NDQ_018726 | examples of transverse waves include the wave that travels through a | a. guitar string when you pluck it, b. spring toy when you shake it from side to side, c. bungee cord when you shake it up and down, d. all of the above | d | Lesson: transverse wave
What Is a Transverse Wave:
A transverse wave is a wave in which particles of the medium vibrate at right angles, or perpendicular, to the direction that the wave travels. Another example of a transverse wave is the wave that passes through a rope with you shake one end of the rope up and down, ... |
NDQ_018727 | earthquake waves travel in all directions away from the disturbance that causes the earthquake. | a. true, b. false | a | Lesson: transverse wave
What Is a Transverse Wave:
A transverse wave is a wave in which particles of the medium vibrate at right angles, or perpendicular, to the direction that the wave travels. Another example of a transverse wave is the wave that passes through a rope with you shake one end of the rope up and down, ... |
NDQ_018728 | s waves travel through underground rocks. | a. true, b. false | a | Lesson: transverse wave
What Is a Transverse Wave:
A transverse wave is a wave in which particles of the medium vibrate at right angles, or perpendicular, to the direction that the wave travels. Another example of a transverse wave is the wave that passes through a rope with you shake one end of the rope up and down, ... |
NDQ_018730 | types of friction include | a. static friction, b. sliding friction, c. rolling friction, d. all of the above | d | Lesson: types of friction
Four Types of Friction:
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and ... |
NDQ_018732 | static friction prevents you from slipping when you walk on a sidewalk. | a. true, b. false | a | Lesson: types of friction
Four Types of Friction:
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and ... |
NDQ_018733 | sliding friction is stronger than static friction. | a. true, b. false | b | Lesson: types of friction
Four Types of Friction:
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and ... |
NDQ_018737 | factors that affect the amount of friction against an object moving through the air include the objects | a. speed, b. weight, c. temperature, d. two of the above | a | Lesson: types of friction
Four Types of Friction:
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and ... |
NDQ_018738 | when you put on the brakes of your bike, the wheels stop turning. then friction between the wheels and the road slows your bike to a stop. which type of friction is this? | a. fluid friction, b. static friction, c. sliding friction, d. rolling friction | c | Lesson: types of friction
Four Types of Friction:
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and ... |
NDQ_018743 | some animals use echolocation to find prey. | a. true, b. false | a | Lesson: ultrasound
What Is Ultrasound:
Ultrasound is sound that has a wave frequency higher than the human ear can detect. It includes all sound with wave frequencies higher than 20,000 waves per second, or 20,000 hertz (Hz). Although we cant hear ultrasound, it is very useful to humans and some other animals. Uses of... |
NDQ_018745 | sonar is used to determine the | a. speed of motor vehicles, b. distance to underwater objects, c. location of approaching storms, d. all of the above | b | Lesson: ultrasound
What Is Ultrasound:
Ultrasound is sound that has a wave frequency higher than the human ear can detect. It includes all sound with wave frequencies higher than 20,000 waves per second, or 20,000 hertz (Hz). Although we cant hear ultrasound, it is very useful to humans and some other animals. Uses of... |
NDQ_018746 | you can calculate distance from speed and time with the equation | a. distance = speed/time, b. distance = time/speed, c. distance = speed x time, d. none of the above | c | Lesson: ultrasound
What Is Ultrasound:
Ultrasound is sound that has a wave frequency higher than the human ear can detect. It includes all sound with wave frequencies higher than 20,000 waves per second, or 20,000 hertz (Hz). Although we cant hear ultrasound, it is very useful to humans and some other animals. Uses of... |
NDQ_018747 | the speed of sound waves through ocean water is 1437 m/s. assume that ultrasound waves take 2 seconds to travel from a sonar device on a ship to the bottom of the water and back to the ship again. how deep is the water? | a. 2874 m, b. 1437 m, c. 718 m, d. none of the above | b | Lesson: ultrasound
What Is Ultrasound:
Ultrasound is sound that has a wave frequency higher than the human ear can detect. It includes all sound with wave frequencies higher than 20,000 waves per second, or 20,000 hertz (Hz). Although we cant hear ultrasound, it is very useful to humans and some other animals. Uses of... |
NDQ_018748 | the use of reflected ultrasound waves to create images of organs inside the body is called ultrasonography. | a. true, b. false | a | Lesson: ultrasound
What Is Ultrasound:
Ultrasound is sound that has a wave frequency higher than the human ear can detect. It includes all sound with wave frequencies higher than 20,000 waves per second, or 20,000 hertz (Hz). Although we cant hear ultrasound, it is very useful to humans and some other animals. Uses of... |
NDQ_018752 | the smallest alkene is methene. | a. true, b. false | b | Lesson: unsaturated hydrocarbons
What Are Unsaturated Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. The carbon atoms in hydrocarbons may share single, double, or triple covalent bonds. Unsaturated hydrocarbons contain at least one double or triple bond between carbon atoms. They are c... |
NDQ_018753 | smaller alkenes are gases at room temperature. | a. true, b. false | a | Lesson: unsaturated hydrocarbons
What Are Unsaturated Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. The carbon atoms in hydrocarbons may share single, double, or triple covalent bonds. Unsaturated hydrocarbons contain at least one double or triple bond between carbon atoms. They are c... |
NDQ_018754 | which statement about aromatic hydrocarbons is true? | a. they have only single bonds, b. they have branched-chain shapes, c. they have strong scents, d. two of the above | c | Lesson: unsaturated hydrocarbons
What Are Unsaturated Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. The carbon atoms in hydrocarbons may share single, double, or triple covalent bonds. Unsaturated hydrocarbons contain at least one double or triple bond between carbon atoms. They are c... |
NDQ_018756 | alkynes are very common in nature. | a. true, b. false | b | Lesson: unsaturated hydrocarbons
What Are Unsaturated Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. The carbon atoms in hydrocarbons may share single, double, or triple covalent bonds. Unsaturated hydrocarbons contain at least one double or triple bond between carbon atoms. They are c... |
NDQ_018757 | which chemical formula represents an alkyne? | a. ch4, b. c2h6, c. c2h4, d. c2h2 | d | Lesson: unsaturated hydrocarbons
What Are Unsaturated Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. The carbon atoms in hydrocarbons may share single, double, or triple covalent bonds. Unsaturated hydrocarbons contain at least one double or triple bond between carbon atoms. They are c... |
NDQ_018759 | earth has north and south magnetic poles like a bar magnet. | a. true, b. false | a | Lesson: using earths magnetic field
Earths Magnetic Field:
Like a bar magnet, planet Earth has north and south magnetic poles and a magnetic field over which it exerts magnetic force. Earths magnetic field is called the magnetosphere. You can see it in the Figure 1.1.
Like an Umbrella:
The sun gives off radiation in... |
NDQ_018762 | how does earths magnetic field protect the planet? | a. it holds the atmosphere in place, b. it deflects solar winds, c. it protects earths organisms from radiation, d. two of the above | d | Lesson: using earths magnetic field
Earths Magnetic Field:
Like a bar magnet, planet Earth has north and south magnetic poles and a magnetic field over which it exerts magnetic force. Earths magnetic field is called the magnetosphere. You can see it in the Figure 1.1.
Like an Umbrella:
The sun gives off radiation in... |
NDQ_018763 | there would be no northern lights without the magnetosphere. | a. true, b. false | a | Lesson: using earths magnetic field
Earths Magnetic Field:
Like a bar magnet, planet Earth has north and south magnetic poles and a magnetic field over which it exerts magnetic force. Earths magnetic field is called the magnetosphere. You can see it in the Figure 1.1.
Like an Umbrella:
The sun gives off radiation in... |
NDQ_018764 | animals that use earths magnetic field for navigation include | a. loggerhead turtles, b. migratory birds, c. humans, d. all of the above | d | Lesson: using earths magnetic field
Earths Magnetic Field:
Like a bar magnet, planet Earth has north and south magnetic poles and a magnetic field over which it exerts magnetic force. Earths magnetic field is called the magnetosphere. You can see it in the Figure 1.1.
Like an Umbrella:
The sun gives off radiation in... |
NDQ_018766 | people have only recently started using earths magnetic field for determining direction. | a. true, b. false | b | Lesson: using earths magnetic field
Earths Magnetic Field:
Like a bar magnet, planet Earth has north and south magnetic poles and a magnetic field over which it exerts magnetic force. Earths magnetic field is called the magnetosphere. You can see it in the Figure 1.1.
Like an Umbrella:
The sun gives off radiation in... |
NDQ_018767 | some birds may be able to sense earths magnetic field lines as a visual pattern. | a. true, b. false | a | Lesson: using earths magnetic field
Earths Magnetic Field:
Like a bar magnet, planet Earth has north and south magnetic poles and a magnetic field over which it exerts magnetic force. Earths magnetic field is called the magnetosphere. You can see it in the Figure 1.1.
Like an Umbrella:
The sun gives off radiation in... |
NDQ_018770 | valence electrons tend to be attracted by the nuclei of other atoms as much as, or more than, the nucleus of their own atom. | a. true, b. false | a | Lesson: valence electrons
What Are Valence Electrons:
Valence electrons are the electrons in the outer energy level of an atom that can participate in interactions with other atoms. Valence electrons are generally the electrons that are farthest from the nucleus. As a result, they may be attracted as much or more by t... |
NDQ_018772 | all the elements in the same period of the periodic table have the same number of valence electrons. | a. true, b. false | b | Lesson: valence electrons
What Are Valence Electrons:
Valence electrons are the electrons in the outer energy level of an atom that can participate in interactions with other atoms. Valence electrons are generally the electrons that are farthest from the nucleus. As a result, they may be attracted as much or more by t... |
NDQ_018773 | what is the maximum number of valence electrons an element may have? | a. 6, b. 8, c. 10, d. 12 | b | Lesson: valence electrons
What Are Valence Electrons:
Valence electrons are the electrons in the outer energy level of an atom that can participate in interactions with other atoms. Valence electrons are generally the electrons that are farthest from the nucleus. As a result, they may be attracted as much or more by t... |
NDQ_018774 | when a group 1 element reacts it | a. gains two electrons, b. loses two electrons, c. gains one electron, d. loses one electron | d | Lesson: valence electrons
What Are Valence Electrons:
Valence electrons are the electrons in the outer energy level of an atom that can participate in interactions with other atoms. Valence electrons are generally the electrons that are farthest from the nucleus. As a result, they may be attracted as much or more by t... |
NDQ_018775 | which element would you expect to gain one electron in a chemical reaction? | a. chlorine, b. oxygen, c. nitrogen, d. carbon | a | Lesson: valence electrons
What Are Valence Electrons:
Valence electrons are the electrons in the outer energy level of an atom that can participate in interactions with other atoms. Valence electrons are generally the electrons that are farthest from the nucleus. As a result, they may be attracted as much or more by t... |
NDQ_018781 | velocity is a vector. | a. true, b. false | a | Lesson: velocity
Speed and Direction:
Speed tells you only how fast or slow an object is moving. It doesnt tell you the direction the object is moving. The measure of both speed and direction is called velocity. Velocity is a vector. A vector is measurement that includes both size and direction. Vectors are often repr... |
NDQ_018782 | if you represent velocity with an arrow, the length of the arrow represents | a. speed, b. distance, c. direction, d. acceleration | a | Lesson: velocity
Speed and Direction:
Speed tells you only how fast or slow an object is moving. It doesnt tell you the direction the object is moving. The measure of both speed and direction is called velocity. Velocity is a vector. A vector is measurement that includes both size and direction. Vectors are often repr... |
NDQ_018784 | the si unit for velocity is km/h. | a. true, b. false | b | Lesson: velocity
Speed and Direction:
Speed tells you only how fast or slow an object is moving. It doesnt tell you the direction the object is moving. The measure of both speed and direction is called velocity. Velocity is a vector. A vector is measurement that includes both size and direction. Vectors are often repr... |
NDQ_018786 | the steepness of a line graph is called its slope. | a. true, b. false | a | Lesson: velocity time graphs
Plotting Velocity Against Time:
The changing velocity of the sprinteror of any other moving person or objectcan be represented by a velocity- time graph like the one in the Figure 1.1 for the sprinter. A velocity-time graph shows how velocity changes over time. The sprinters velocity incre... |
NDQ_018789 | if a velocity-time graph is horizontal, then velocity is | a. increasing, b. decreasing, c. not changing, d. accelerating | c | Lesson: velocity time graphs
Plotting Velocity Against Time:
The changing velocity of the sprinteror of any other moving person or objectcan be represented by a velocity- time graph like the one in the Figure 1.1 for the sprinter. A velocity-time graph shows how velocity changes over time. The sprinters velocity incre... |
NDQ_018790 | in the graph described in question 5, acceleration is | a. zero, b. positive, c. less than 1, d. none of the above | a | Lesson: velocity time graphs
Plotting Velocity Against Time:
The changing velocity of the sprinteror of any other moving person or objectcan be represented by a velocity- time graph like the one in the Figure 1.1 for the sprinter. A velocity-time graph shows how velocity changes over time. The sprinters velocity incre... |
NDQ_018792 | in the graph in question 8, acceleration between seconds 2 and 4 is 10 m/s. | a. true, b. false | b | Lesson: velocity time graphs
Plotting Velocity Against Time:
The changing velocity of the sprinteror of any other moving person or objectcan be represented by a velocity- time graph like the one in the Figure 1.1 for the sprinter. A velocity-time graph shows how velocity changes over time. The sprinters velocity incre... |
NDQ_018796 | a clear image is produced by diffuse reflection. | a. true, b. false | b | Lesson: visible light and matter
Reflection:
Reflection of light occurs when light bounces back from a surface that it cannot pass through. Reflection may be regular or diffuse. If the surface is very smooth, like a mirror, the reflected light forms a very clear image. This is called regular, or specular, reflection. ... |
NDQ_018797 | regular reflection occurs when the reflective surface is very smooth. | a. true, b. false | a | Lesson: visible light and matter
Reflection:
Reflection of light occurs when light bounces back from a surface that it cannot pass through. Reflection may be regular or diffuse. If the surface is very smooth, like a mirror, the reflected light forms a very clear image. This is called regular, or specular, reflection. ... |
NDQ_018799 | when light passes from one medium into another it may | a. change direction, b. change speed, c. be refracted, d. all of the above | d | Lesson: visible light and matter
Reflection:
Reflection of light occurs when light bounces back from a surface that it cannot pass through. Reflection may be regular or diffuse. If the surface is very smooth, like a mirror, the reflected light forms a very clear image. This is called regular, or specular, reflection. ... |
NDQ_018801 | when light is absorbed, it transfers its energy to matter. | a. true, b. false | a | Lesson: visible light and matter
Reflection:
Reflection of light occurs when light bounces back from a surface that it cannot pass through. Reflection may be regular or diffuse. If the surface is very smooth, like a mirror, the reflected light forms a very clear image. This is called regular, or specular, reflection. ... |
NDQ_018802 | what happens to light that strikes transparent matter? | a. it is reflected, b. it is absorbed, c. it is transmitted, d. none of the above | c | Lesson: visible light and matter
Reflection:
Reflection of light occurs when light bounces back from a surface that it cannot pass through. Reflection may be regular or diffuse. If the surface is very smooth, like a mirror, the reflected light forms a very clear image. This is called regular, or specular, reflection. ... |
NDQ_018804 | matter is opaque if it | a. absorbs light, b. reflects light, c. transmits light, d. two of the above | d | Lesson: visible light and matter
Reflection:
Reflection of light occurs when light bounces back from a surface that it cannot pass through. Reflection may be regular or diffuse. If the surface is very smooth, like a mirror, the reflected light forms a very clear image. This is called regular, or specular, reflection. ... |
NDQ_018807 | the sclera is the opaque, white, outer covering of the eye. | a. true, b. false | a | Lesson: vision and the eye
Structure and Function of the Eye:
The human eye is an organ that is specialized to collect light and focus images. The structures of the human eye are shown in the Figure 1.1. Examine each structure in the diagram as you read about it below. The sclera, also known as the white of the eye, i... |
NDQ_018808 | the lens is the only structure in the eye that focuses light. | a. true, b. false | b | Lesson: vision and the eye
Structure and Function of the Eye:
The human eye is an organ that is specialized to collect light and focus images. The structures of the human eye are shown in the Figure 1.1. Examine each structure in the diagram as you read about it below. The sclera, also known as the white of the eye, i... |
NDQ_018809 | which of the following statements about the cornea is false? | a. it is transparent, b. it helps focus light, c. it helps protect the eye, d. none of the above | d | Lesson: vision and the eye
Structure and Function of the Eye:
The human eye is an organ that is specialized to collect light and focus images. The structures of the human eye are shown in the Figure 1.1. Examine each structure in the diagram as you read about it below. The sclera, also known as the white of the eye, i... |
NDQ_018810 | which structure controls the amount of light that enters the eye? | a. retina, b. lens, c. pupil, d. none of the above | c | Lesson: vision and the eye
Structure and Function of the Eye:
The human eye is an organ that is specialized to collect light and focus images. The structures of the human eye are shown in the Figure 1.1. Examine each structure in the diagram as you read about it below. The sclera, also known as the white of the eye, i... |
NDQ_018811 | the membrane lining the back of the eye is the | a. cornea, b. sclera, c. retina, d. optic nerve | c | Lesson: vision and the eye
Structure and Function of the Eye:
The human eye is an organ that is specialized to collect light and focus images. The structures of the human eye are shown in the Figure 1.1. Examine each structure in the diagram as you read about it below. The sclera, also known as the white of the eye, i... |
NDQ_018813 | rods are nerve cells that sense different colors of light. | a. true, b. false | b | Lesson: vision and the eye
Structure and Function of the Eye:
The human eye is an organ that is specialized to collect light and focus images. The structures of the human eye are shown in the Figure 1.1. Examine each structure in the diagram as you read about it below. The sclera, also known as the white of the eye, i... |
NDQ_018817 | the vision problem called myopia is also called farsightedness. | a. true, b. false | b | Lesson: vision problems and corrective lenses
Problems with Vision:
Many people have problems with their vision, or ability to see. Often, the problem is due to the shape of the eyes and how they focus light. Two of the most common vision problems are nearsightedness and farsightedness, which you can read about below.... |
NDQ_018818 | in myopia, images focus | a. in front of the retina, b. behind the retina, c. above the retina, d. on the retina | a | Lesson: vision problems and corrective lenses
Problems with Vision:
Many people have problems with their vision, or ability to see. Often, the problem is due to the shape of the eyes and how they focus light. Two of the most common vision problems are nearsightedness and farsightedness, which you can read about below.... |
NDQ_018819 | the vision problem called hyperopia is also called nearsightedness. | a. true, b. false | b | Lesson: vision problems and corrective lenses
Problems with Vision:
Many people have problems with their vision, or ability to see. Often, the problem is due to the shape of the eyes and how they focus light. Two of the most common vision problems are nearsightedness and farsightedness, which you can read about below.... |
NDQ_018820 | in hyperopia, the eyeball is | a. longer than normal, b. shorter than normal, c. smaller than normal, d. larger than normal | b | Lesson: vision problems and corrective lenses
Problems with Vision:
Many people have problems with their vision, or ability to see. Often, the problem is due to the shape of the eyes and how they focus light. Two of the most common vision problems are nearsightedness and farsightedness, which you can read about below.... |
NDQ_018826 | all waves that travel through matter are called | a. longitudinal waves, b. mechanical waves, c. transverse waves, d. surface waves | b | Lesson: wave amplitude
Whats the Matter:
Waves that travel through mattersuch as the fabric of a flagare called mechanical waves. The matter they travel through is called the medium. When the energy of a wave passes through the medium, particles of the medium move. The more energy the wave has, the farther the particl... |
NDQ_018827 | the matter a wave travels through is called the material of the wave. | a. true, b. false | b | Lesson: wave amplitude
Whats the Matter:
Waves that travel through mattersuch as the fabric of a flagare called mechanical waves. The matter they travel through is called the medium. When the energy of a wave passes through the medium, particles of the medium move. The more energy the wave has, the farther the particl... |
NDQ_018828 | the more energy a wave has, the farther the particles of matter move. | a. true, b. false | a | Lesson: wave amplitude
Whats the Matter:
Waves that travel through mattersuch as the fabric of a flagare called mechanical waves. The matter they travel through is called the medium. When the energy of a wave passes through the medium, particles of the medium move. The more energy the wave has, the farther the particl... |
NDQ_018829 | the position of a particle of matter in the absence of a wave is called the | a. trough, b. midline, c. resting position, d. normal location | c | Lesson: wave amplitude
Whats the Matter:
Waves that travel through mattersuch as the fabric of a flagare called mechanical waves. The matter they travel through is called the medium. When the energy of a wave passes through the medium, particles of the medium move. The more energy the wave has, the farther the particl... |
NDQ_018833 | a wave with greater energy has a larger amplitude. | a. true, b. false | a | Lesson: wave amplitude
Whats the Matter:
Waves that travel through mattersuch as the fabric of a flagare called mechanical waves. The matter they travel through is called the medium. When the energy of a wave passes through the medium, particles of the medium move. The more energy the wave has, the farther the particl... |
NDQ_018834 | in all mechanical waves, particles of the medium move up and down when the wave passes through them. | a. true, b. false | b | Lesson: wave amplitude
Whats the Matter:
Waves that travel through mattersuch as the fabric of a flagare called mechanical waves. The matter they travel through is called the medium. When the energy of a wave passes through the medium, particles of the medium move. The more energy the wave has, the farther the particl... |
NDQ_018839 | a wave with a higher frequency has a longer wavelength. | a. true, b. false | b | Lesson: wave frequency
What Is Wave Frequency:
The number of waves that pass a fixed point in a given amount of time is wave frequency. Wave frequency can be measured by counting the number of crests (high points) of waves that pass the fixed point in 1 second or some other time period. The higher the number is, the g... |
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