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NDQ_017168 | an external combustion engine burns fuel to heat air. | a. true, b. false | b | Lesson: external combustion engines
What Is a Combustion Engine:
A combustion engine is a complex machine that burns fuel to produce thermal energy and then uses the thermal energy to do work. There are two types of combustion engines: external and internal. A steam engine is an external combustion engine.
How Exter... |
NDQ_017170 | external combustion engines are no longer in use today. | a. true, b. false | b | Lesson: external combustion engines
What Is a Combustion Engine:
A combustion engine is a complex machine that burns fuel to produce thermal energy and then uses the thermal energy to do work. There are two types of combustion engines: external and internal. A steam engine is an external combustion engine.
How Exter... |
NDQ_017171 | all materials respond to magnetic force. | a. true, b. false | b | Lesson: ferromagnetic material
What Makes a Material Magnetic:
Magnetism is the ability of a material to be attracted by a magnet and to act as a magnet. Magnetism is due to the movement of electrons within atoms of matter. When electrons spin around the nucleus of an atom, it causes the atom to become a tiny magnet, ... |
NDQ_017173 | nonmagnetic materials include | a. wood, b. glass, c. plastic, d. all of the above | d | Lesson: ferromagnetic material
What Makes a Material Magnetic:
Magnetism is the ability of a material to be attracted by a magnet and to act as a magnet. Magnetism is due to the movement of electrons within atoms of matter. When electrons spin around the nucleus of an atom, it causes the atom to become a tiny magnet, ... |
NDQ_017174 | magnetism is due to the movement of electrons within atoms. | a. true, b. false | a | Lesson: ferromagnetic material
What Makes a Material Magnetic:
Magnetism is the ability of a material to be attracted by a magnet and to act as a magnet. Magnetism is due to the movement of electrons within atoms of matter. When electrons spin around the nucleus of an atom, it causes the atom to become a tiny magnet, ... |
NDQ_017177 | all of the following materials can be magnetized except | a. iron, b. carbon, c. cobalt, d. nickel | b | Lesson: ferromagnetic material
What Makes a Material Magnetic:
Magnetism is the ability of a material to be attracted by a magnet and to act as a magnet. Magnetism is due to the movement of electrons within atoms of matter. When electrons spin around the nucleus of an atom, it causes the atom to become a tiny magnet, ... |
NDQ_017178 | if you stroke an iron nail with a bar magnet, the nail will become a temporary magnet. | a. true, b. false | b | Lesson: ferromagnetic material
What Makes a Material Magnetic:
Magnetism is the ability of a material to be attracted by a magnet and to act as a magnet. Magnetism is due to the movement of electrons within atoms of matter. When electrons spin around the nucleus of an atom, it causes the atom to become a tiny magnet, ... |
NDQ_017179 | a permanent magnet can be demagnetized by | a. dropping it, b. heating it, c. cooling it, d. two of the above | d | Lesson: ferromagnetic material
What Makes a Material Magnetic:
Magnetism is the ability of a material to be attracted by a magnet and to act as a magnet. Magnetism is due to the movement of electrons within atoms of matter. When electrons spin around the nucleus of an atom, it causes the atom to become a tiny magnet, ... |
NDQ_017192 | fundamental forces of the universe include | a. gravity, b. friction, c. electromagnetic force, d. two of the above | d | Lesson: force
Defining Force:
Force is defined as a push or pull acting on an object. There are several fundamental forces in the universe, including the force of gravity, electromagnetic force, and weak and strong nuclear forces. When it comes to the motion of everyday objects, however, the forces of interest include... |
NDQ_017193 | the main forces that affect the motion of everyday objects include | a. gravity, b. friction, c. applied force, d. all of the above | d | Lesson: force
Defining Force:
Force is defined as a push or pull acting on an object. There are several fundamental forces in the universe, including the force of gravity, electromagnetic force, and weak and strong nuclear forces. When it comes to the motion of everyday objects, however, the forces of interest include... |
NDQ_017196 | only some changes in speed or direction are caused by forces. | a. true, b. false | b | Lesson: force
Defining Force:
Force is defined as a push or pull acting on an object. There are several fundamental forces in the universe, including the force of gravity, electromagnetic force, and weak and strong nuclear forces. When it comes to the motion of everyday objects, however, the forces of interest include... |
NDQ_017197 | the force required to change an objects motion depends on the objects mass. | a. true, b. false | a | Lesson: force
Defining Force:
Force is defined as a push or pull acting on an object. There are several fundamental forces in the universe, including the force of gravity, electromagnetic force, and weak and strong nuclear forces. When it comes to the motion of everyday objects, however, the forces of interest include... |
NDQ_017199 | force is a vector. | a. true, b. false | a | Lesson: force
Defining Force:
Force is defined as a push or pull acting on an object. There are several fundamental forces in the universe, including the force of gravity, electromagnetic force, and weak and strong nuclear forces. When it comes to the motion of everyday objects, however, the forces of interest include... |
NDQ_017203 | energy can change from one form to another. | a. true, b. false | a | Lesson: forms of energy
Introducing Forms of Energy:
Energy, or the ability to cause changes in matter, can exist in many different forms. Energy can also change from one form to another. The photo above of the guitar player represents six forms of energy: mechanical, chemical, electrical, light, thermal, and sound en... |
NDQ_017207 | the energy of moving electrons is called chemical energy. | a. true, b. false | b | Lesson: forms of energy
Introducing Forms of Energy:
Energy, or the ability to cause changes in matter, can exist in many different forms. Energy can also change from one form to another. The photo above of the guitar player represents six forms of energy: mechanical, chemical, electrical, light, thermal, and sound en... |
NDQ_017208 | electromagnetic energy includes | a. light energy, b. sound energy, c. heat energy, d. two of the above | a | Lesson: forms of energy
Introducing Forms of Energy:
Energy, or the ability to cause changes in matter, can exist in many different forms. Energy can also change from one form to another. The photo above of the guitar player represents six forms of energy: mechanical, chemical, electrical, light, thermal, and sound en... |
NDQ_017210 | energy that travels in waves through matter is | a. nuclear energy, b. electrical energy, c. sound energy, d. two of the above | c | Lesson: forms of energy
Introducing Forms of Energy:
Energy, or the ability to cause changes in matter, can exist in many different forms. Energy can also change from one form to another. The photo above of the guitar player represents six forms of energy: mechanical, chemical, electrical, light, thermal, and sound en... |
NDQ_017223 | the pitch of sound depends on the amplitude of sound waves. | a. true, b. false | b | Lesson: frequency and pitch of sound
High or Low:
How high or low a sound seems to a listener is its pitch. Pitch, in turn, depends on the frequency of sound waves. Wave frequency is the number of waves that pass a fixed point in a given amount of time. High-pitched sounds, like the sounds of the piccolo in the Figure... |
NDQ_017224 | compared to a higher-pitched sound, a lower-pitched sound always has a | a. shorter wavelength, b. smaller amplitude, c. lower frequency, d. two of the above | c | Lesson: frequency and pitch of sound
High or Low:
How high or low a sound seems to a listener is its pitch. Pitch, in turn, depends on the frequency of sound waves. Wave frequency is the number of waves that pass a fixed point in a given amount of time. High-pitched sounds, like the sounds of the piccolo in the Figure... |
NDQ_017225 | the frequency of sound waves is measured in | a. meters, b. meters/second, c. hertz, d. none of the above | c | Lesson: frequency and pitch of sound
High or Low:
How high or low a sound seems to a listener is its pitch. Pitch, in turn, depends on the frequency of sound waves. Wave frequency is the number of waves that pass a fixed point in a given amount of time. High-pitched sounds, like the sounds of the piccolo in the Figure... |
NDQ_017228 | dogs can hear sounds that are too high in pitch for humans to hear. | a. true, b. false | a | Lesson: frequency and pitch of sound
High or Low:
How high or low a sound seems to a listener is its pitch. Pitch, in turn, depends on the frequency of sound waves. Wave frequency is the number of waves that pass a fixed point in a given amount of time. High-pitched sounds, like the sounds of the piccolo in the Figure... |
NDQ_017229 | what is the highest-frequency sound that humans normally can hear? | a. 20 hz, b. 200 hz, c. 2000 hz, d. 20,000 hz | d | Lesson: frequency and pitch of sound
High or Low:
How high or low a sound seems to a listener is its pitch. Pitch, in turn, depends on the frequency of sound waves. Wave frequency is the number of waves that pass a fixed point in a given amount of time. High-pitched sounds, like the sounds of the piccolo in the Figure... |
NDQ_017233 | only rough surfaces have friction between them. | a. true, b. false | b | Lesson: friction
What Is Friction:
Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engi... |
NDQ_017236 | factors that affect friction between two surface include the | a. smoothness of the two surfaces, b. area of the two surfaces, c. amount of force pressing the two surfaces together, d. all of the above | d | Lesson: friction
What Is Friction:
Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engi... |
NDQ_017237 | heavier objects have less friction with the floor than lighter objects. | a. true, b. false | b | Lesson: friction
What Is Friction:
Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engi... |
NDQ_017238 | the blades of your skates slide more easily over ice than do the soles of your shoes because the skate blades | a. exert less force on the ice, b. make you weigh less on the ice, c. have less surface area in contact with the ice, d. none of the above | c | Lesson: friction
What Is Friction:
Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engi... |
NDQ_017239 | friction produces heat because it causes molecules to move faster and have more energy. | a. true, b. false | a | Lesson: friction
What Is Friction:
Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engi... |
NDQ_017240 | engine oil reduces friction between the moving parts in a car engine by | a. cooling the engine, b. reducing the forces on the parts, c. making the parts slippery, d. two of the above | c | Lesson: friction
What Is Friction:
Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engi... |
NDQ_017242 | which fundamental particle was discovered first? | a. gluon, b. photon, c. quark, d. electron | d | Lesson: fundamental particles
The Search for Fundamental Particles:
Scientists have long wanted to find the most basic building blocks of the universe. They asked, what are the fundamental particles of matter that cannot be subdivided into smaller, simpler particles, and what holds these particles together? The quest ... |
NDQ_017243 | fundamental particles that make up protons and neutrons are known as | a. bosons, b. leptons, c. quarks, d. none of the above | c | Lesson: fundamental particles
The Search for Fundamental Particles:
Scientists have long wanted to find the most basic building blocks of the universe. They asked, what are the fundamental particles of matter that cannot be subdivided into smaller, simpler particles, and what holds these particles together? The quest ... |
NDQ_017244 | scientists think that leptons and quarks are held together by neutrinos. | a. true, b. false | b | Lesson: fundamental particles
The Search for Fundamental Particles:
Scientists have long wanted to find the most basic building blocks of the universe. They asked, what are the fundamental particles of matter that cannot be subdivided into smaller, simpler particles, and what holds these particles together? The quest ... |
NDQ_017245 | in ordinary matter, virtually all quarks are strange quarks and charm quarks. | a. true, b. false | b | Lesson: fundamental particles
The Search for Fundamental Particles:
Scientists have long wanted to find the most basic building blocks of the universe. They asked, what are the fundamental particles of matter that cannot be subdivided into smaller, simpler particles, and what holds these particles together? The quest ... |
NDQ_017247 | fundamental forces that affect matter include | a. gravitational force, b. electromagnetic force, c. weak nuclear force, d. all of the above | d | Lesson: fundamental particles
The Search for Fundamental Particles:
Scientists have long wanted to find the most basic building blocks of the universe. They asked, what are the fundamental particles of matter that cannot be subdivided into smaller, simpler particles, and what holds these particles together? The quest ... |
NDQ_017251 | gamma rays | a. are waves of electric and magnetic energy, b. travel at the speed of light, c. have more energy than any other electromagnetic waves, d. all of the above | d | Lesson: gamma decay
What Are Gamma Rays:
Gamma rays are electromagnetic waves. Electromagnetic waves are waves of electric and magnetic energy that travel through space at the speed of light. The energy travels in tiny packets of energy, called photons. Photons of gamma energy are called gamma particles. Other electro... |
NDQ_017254 | radioactive nuclei undergo decay because they are unstable. | a. true, b. false | a | Lesson: gamma decay
What Are Gamma Rays:
Gamma rays are electromagnetic waves. Electromagnetic waves are waves of electric and magnetic energy that travel through space at the speed of light. The energy travels in tiny packets of energy, called photons. Photons of gamma energy are called gamma particles. Other electro... |
NDQ_017255 | in gamma decay, both particles of matter and energy are emitted. | a. true, b. false | b | Lesson: gamma decay
What Are Gamma Rays:
Gamma rays are electromagnetic waves. Electromagnetic waves are waves of electric and magnetic energy that travel through space at the speed of light. The energy travels in tiny packets of energy, called photons. Photons of gamma energy are called gamma particles. Other electro... |
NDQ_017257 | gamma decay results in a nucleus with a different number of protons. | a. true, b. false | b | Lesson: gamma decay
What Are Gamma Rays:
Gamma rays are electromagnetic waves. Electromagnetic waves are waves of electric and magnetic energy that travel through space at the speed of light. The energy travels in tiny packets of energy, called photons. Photons of gamma energy are called gamma particles. Other electro... |
NDQ_017261 | higher-energy electromagnetic waves have lower frequencies. | a. true, b. false | b | Lesson: gamma rays
The Range of Electromagnetic Waves:
Electromagnetic waves transfer energy across space as well as through matter. They vary in their wavelengths and frequencies, and higher-frequency waves have more energy. The full range of wavelengths of electromagnetic waves, shown in the Figure 1.1, is called th... |
NDQ_017263 | gamma rays have wavelengths shorter than the nucleus of an atom. | a. true, b. false | a | Lesson: gamma rays
The Range of Electromagnetic Waves:
Electromagnetic waves transfer energy across space as well as through matter. They vary in their wavelengths and frequencies, and higher-frequency waves have more energy. The full range of wavelengths of electromagnetic waves, shown in the Figure 1.1, is called th... |
NDQ_017264 | the frequencies of gamma rays are | a. higher than 1019 hertz, b. lower than a billion waves per second, c. higher than the frequencies of x rays, d. two of the above | d | Lesson: gamma rays
The Range of Electromagnetic Waves:
Electromagnetic waves transfer energy across space as well as through matter. They vary in their wavelengths and frequencies, and higher-frequency waves have more energy. The full range of wavelengths of electromagnetic waves, shown in the Figure 1.1, is called th... |
NDQ_017265 | sources of gamma rays include | a. the sun, b. collapsing stars, c. radioactive decay, d. all of the above | d | Lesson: gamma rays
The Range of Electromagnetic Waves:
Electromagnetic waves transfer energy across space as well as through matter. They vary in their wavelengths and frequencies, and higher-frequency waves have more energy. The full range of wavelengths of electromagnetic waves, shown in the Figure 1.1, is called th... |
NDQ_017266 | gamma rays from space are absorbed by earths atmosphere. | a. true, b. false | a | Lesson: gamma rays
The Range of Electromagnetic Waves:
Electromagnetic waves transfer energy across space as well as through matter. They vary in their wavelengths and frequencies, and higher-frequency waves have more energy. The full range of wavelengths of electromagnetic waves, shown in the Figure 1.1, is called th... |
NDQ_017267 | gamma rays can pass through | a. bones, b. teeth, c. skin, d. all of the above | d | Lesson: gamma rays
The Range of Electromagnetic Waves:
Electromagnetic waves transfer energy across space as well as through matter. They vary in their wavelengths and frequencies, and higher-frequency waves have more energy. The full range of wavelengths of electromagnetic waves, shown in the Figure 1.1, is called th... |
NDQ_017282 | gravity acts only between objects that are touching. | a. true, b. false | b | Lesson: gravity
Defining Gravity:
Gravity has traditionally been defined as a force of attraction between things that have mass. According to this conception of gravity, anything that has mass, no matter how small, exerts gravity on other matter. Gravity can act between objects that are not even touching. In fact, gra... |
NDQ_017283 | the strength of gravity between two objects depends on their | a. size, b. volume, c. mass, d. all of the above | c | Lesson: gravity
Defining Gravity:
Gravity has traditionally been defined as a force of attraction between things that have mass. According to this conception of gravity, anything that has mass, no matter how small, exerts gravity on other matter. Gravity can act between objects that are not even touching. In fact, gra... |
NDQ_017284 | which of the following objects has the greatest gravity? | a. the moon, b. the sun, c. earth, d. you | b | Lesson: gravity
Defining Gravity:
Gravity has traditionally been defined as a force of attraction between things that have mass. According to this conception of gravity, anything that has mass, no matter how small, exerts gravity on other matter. Gravity can act between objects that are not even touching. In fact, gra... |
NDQ_017286 | there is gravitational attraction between you and every object around you. | a. true, b. false | a | Lesson: gravity
Defining Gravity:
Gravity has traditionally been defined as a force of attraction between things that have mass. According to this conception of gravity, anything that has mass, no matter how small, exerts gravity on other matter. Gravity can act between objects that are not even touching. In fact, gra... |
NDQ_017290 | weight is measured with a balance. | a. true, b. false | b | Lesson: gravity
Defining Gravity:
Gravity has traditionally been defined as a force of attraction between things that have mass. According to this conception of gravity, anything that has mass, no matter how small, exerts gravity on other matter. Gravity can act between objects that are not even touching. In fact, gra... |
NDQ_017292 | the groups in question 1 are the only groups in the periodic that contain elements in more than one class. | a. true, b. false | a | Lesson: groups with metalloids
Groups 1316:
Groups 13-16 of the periodic table (orange in the Figure 1.1) are the only groups that contain elements classified as metalloids. Unlike other groups of the periodic table, which contain elements in just one class, groups 13-16 contain elements in at least two different clas... |
NDQ_017294 | metalloids include the element | a. gallium, b. phosphorus, c. selenium, d. germanium | d | Lesson: groups with metalloids
Groups 1316:
Groups 13-16 of the periodic table (orange in the Figure 1.1) are the only groups that contain elements classified as metalloids. Unlike other groups of the periodic table, which contain elements in just one class, groups 13-16 contain elements in at least two different clas... |
NDQ_017295 | which of the following is a property of metalloids? | a. malleability, b. brittleness, c. dullness, d. all of the above | b | Lesson: groups with metalloids
Groups 1316:
Groups 13-16 of the periodic table (orange in the Figure 1.1) are the only groups that contain elements classified as metalloids. Unlike other groups of the periodic table, which contain elements in just one class, groups 13-16 contain elements in at least two different clas... |
NDQ_017296 | which of the following statements is (are) true of boron? | a. it has three valence electrons, b. it is fairly reactive, c. it is a solid at room temperature, d. all of the above | d | Lesson: groups with metalloids
Groups 1316:
Groups 13-16 of the periodic table (orange in the Figure 1.1) are the only groups that contain elements classified as metalloids. Unlike other groups of the periodic table, which contain elements in just one class, groups 13-16 contain elements in at least two different clas... |
NDQ_017297 | carbon is a metalloid. | a. true, b. false | b | Lesson: groups with metalloids
Groups 1316:
Groups 13-16 of the periodic table (orange in the Figure 1.1) are the only groups that contain elements classified as metalloids. Unlike other groups of the periodic table, which contain elements in just one class, groups 13-16 contain elements in at least two different clas... |
NDQ_017298 | all group 15 elements are very reactive. | a. true, b. false | b | Lesson: groups with metalloids
Groups 1316:
Groups 13-16 of the periodic table (orange in the Figure 1.1) are the only groups that contain elements classified as metalloids. Unlike other groups of the periodic table, which contain elements in just one class, groups 13-16 contain elements in at least two different clas... |
NDQ_017302 | which of the following elements is not a halogen? | a. bromine, b. chlorine, c. selenium, d. iodine | c | Lesson: halogens
Meet the Halogens:
Halogens are highly reactive nonmetallic elements in group 17 of the periodic table. As you can see in the periodic table 1.1, the halogens include the elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). All of them are relatively common on Earth excep... |
NDQ_017303 | the halogen named astatine is radioactive. | a. true, b. false | a | Lesson: halogens
Meet the Halogens:
Halogens are highly reactive nonmetallic elements in group 17 of the periodic table. As you can see in the periodic table 1.1, the halogens include the elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). All of them are relatively common on Earth excep... |
NDQ_017306 | halogens tend to form compounds with elements in group | a. 1, b. 2, c. 16, d. 18 | a | Lesson: halogens
Meet the Halogens:
Halogens are highly reactive nonmetallic elements in group 17 of the periodic table. As you can see in the periodic table 1.1, the halogens include the elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). All of them are relatively common on Earth excep... |
NDQ_017307 | all halogens are gases at room temperature. | a. true, b. false | b | Lesson: halogens
Meet the Halogens:
Halogens are highly reactive nonmetallic elements in group 17 of the periodic table. As you can see in the periodic table 1.1, the halogens include the elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). All of them are relatively common on Earth excep... |
NDQ_017308 | properties of halogens include | a. relatively low melting point, b. ability to conduct electricity, c. ability to conduct heat, d. all of the above | a | Lesson: halogens
Meet the Halogens:
Halogens are highly reactive nonmetallic elements in group 17 of the periodic table. As you can see in the periodic table 1.1, the halogens include the elements fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). All of them are relatively common on Earth excep... |
NDQ_017315 | functions of the ear include | a. gathering sound waves, b. amplifying sound waves, c. changing sound waves to electrical signals, d. all of the above | a | Lesson: hearing and the ear
The Sounds We Hear:
Sound is a form of energy that travels in waves through matter. The ability to sense sound energy and perceive sound is called hearing. The organ that we use to sense sound energy is the ear. Almost all the structures in the ear are needed for this purpose. Together, the... |
NDQ_017316 | all of the following are parts of the outer ear except the | a. pinna, b. ear canal, c. oval window, d. eardrum | c | Lesson: hearing and the ear
The Sounds We Hear:
Sound is a form of energy that travels in waves through matter. The ability to sense sound energy and perceive sound is called hearing. The organ that we use to sense sound energy is the ear. Almost all the structures in the ear are needed for this purpose. Together, the... |
NDQ_017317 | the main role of the middle ear is to change sound waves to electrical impulses. | a. true, b. false | b | Lesson: hearing and the ear
The Sounds We Hear:
Sound is a form of energy that travels in waves through matter. The ability to sense sound energy and perceive sound is called hearing. The organ that we use to sense sound energy is the ear. Almost all the structures in the ear are needed for this purpose. Together, the... |
NDQ_017318 | the inner ear includes the | a. stirrup, b. cochlea, c. anvil, d. all of the above | b | Lesson: hearing and the ear
The Sounds We Hear:
Sound is a form of energy that travels in waves through matter. The ability to sense sound energy and perceive sound is called hearing. The organ that we use to sense sound energy is the ear. Almost all the structures in the ear are needed for this purpose. Together, the... |
NDQ_017319 | you perceive a sound as soon as the sound waves strike your eardrum. | a. true, b. false | b | Lesson: hearing and the ear
The Sounds We Hear:
Sound is a form of energy that travels in waves through matter. The ability to sense sound energy and perceive sound is called hearing. The organ that we use to sense sound energy is the ear. Almost all the structures in the ear are needed for this purpose. Together, the... |
NDQ_017324 | the most common cause of hearing loss is | a. loud sounds, b. infections, c. injuries, d. none of the above | a | Lesson: hearing loss
The Ear and Hearing:
The ear is a complex organ that senses sound energy so we can hear. Hearing is the ability to sense sound energy and perceive sound. All of the structures of the ear that are involved in hearing must work well for a person to have normal hearing. Damage to any of the structure... |
NDQ_017325 | loud sounds cause loss of hearing by damaging the tiny bones of the middle ear. | a. true, b. false | b | Lesson: hearing loss
The Ear and Hearing:
The ear is a complex organ that senses sound energy so we can hear. Hearing is the ability to sense sound energy and perceive sound. All of the structures of the ear that are involved in hearing must work well for a person to have normal hearing. Damage to any of the structure... |
NDQ_017326 | louder sounds damage hearing more quickly than softer sounds. | a. true, b. false | a | Lesson: hearing loss
The Ear and Hearing:
The ear is a complex organ that senses sound energy so we can hear. Hearing is the ability to sense sound energy and perceive sound. All of the structures of the ear that are involved in hearing must work well for a person to have normal hearing. Damage to any of the structure... |
NDQ_017327 | hearing loss caused by loud sounds is temporary. | a. true, b. false | b | Lesson: hearing loss
The Ear and Hearing:
The ear is a complex organ that senses sound energy so we can hear. Hearing is the ability to sense sound energy and perceive sound. All of the structures of the ear that are involved in hearing must work well for a person to have normal hearing. Damage to any of the structure... |
NDQ_017328 | the permissible exposure time to a 97-decibel sound is | a. 1 minute, b. 4 minutes, c. 30 minutes, d. 4 hours | c | Lesson: hearing loss
The Ear and Hearing:
The ear is a complex organ that senses sound energy so we can hear. Hearing is the ability to sense sound energy and perceive sound. All of the structures of the ear that are involved in hearing must work well for a person to have normal hearing. Damage to any of the structure... |
NDQ_017331 | heat is a form of energy. | a. true, b. false | b | Lesson: heat
What Is Heat:
Heat is the transfer of thermal energy between substances. Thermal energy is the kinetic energy of moving particles of matter, measured by their temperature. Thermal energy always moves from matter with greater thermal energy to matter with less thermal energy, so it moves from warmer to coo... |
NDQ_017335 | temperature measures the average kinetic energy of particles. | a. true, b. false | a | Lesson: heat
What Is Heat:
Heat is the transfer of thermal energy between substances. Thermal energy is the kinetic energy of moving particles of matter, measured by their temperature. Thermal energy always moves from matter with greater thermal energy to matter with less thermal energy, so it moves from warmer to coo... |
NDQ_017336 | thermal energy always moves from cooler to warmer substances. | a. true, b. false | b | Lesson: heat
What Is Heat:
Heat is the transfer of thermal energy between substances. Thermal energy is the kinetic energy of moving particles of matter, measured by their temperature. Thermal energy always moves from matter with greater thermal energy to matter with less thermal energy, so it moves from warmer to coo... |
NDQ_017337 | thermal energy is transferred between two substances until | a. one substance is warmer than the other, b. both substances are warmer than they were, c. both substances are cooler than they were, d. both substances have the same temperature | d | Lesson: heat
What Is Heat:
Heat is the transfer of thermal energy between substances. Thermal energy is the kinetic energy of moving particles of matter, measured by their temperature. Thermal energy always moves from matter with greater thermal energy to matter with less thermal energy, so it moves from warmer to coo... |
NDQ_017340 | thermal energy is transferred between substances only when they have different | a. masses, b. volumes, c. temperatures, d. two of the above | c | Lesson: heat
What Is Heat:
Heat is the transfer of thermal energy between substances. Thermal energy is the kinetic energy of moving particles of matter, measured by their temperature. Thermal energy always moves from matter with greater thermal energy to matter with less thermal energy, so it moves from warmer to coo... |
NDQ_017343 | thermal energy can be transferred by | a. conduction, b. convection, c. radiation, d. all of the above | d | Lesson: heat conduction
What Is Conduction:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Conduction is one of three ways that thermal energy can be... |
NDQ_017345 | thermal energy is always transferred | a. from a cooler to warmer object, b. from a warmer to cooler object, c. between objects that are the same temperature, d. two of the above | b | Lesson: heat conduction
What Is Conduction:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Conduction is one of three ways that thermal energy can be... |
NDQ_017346 | only the particles of warm matter are in constant random motion. | a. true, b. false | b | Lesson: heat conduction
What Is Conduction:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Conduction is one of three ways that thermal energy can be... |
NDQ_017348 | all of the following are examples of heat conduction except | a. pressing a shirt with a hot iron, b. warming your hands by holding a cup of hot chocolate, c. warming your hands over a campfire, d. heating soup in a pan on a stovetop | c | Lesson: heat conduction
What Is Conduction:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Conduction is one of three ways that thermal energy can be... |
NDQ_017349 | if you hold an ice cube in your hand, your hand feels really cold because | a. cold is transferred to your hand from the ice cube, b. thermal energy is transferred from your hand to the ice cube, c. thermal energy is transferred to your hand from the ice cube, d. none of the above | b | Lesson: heat conduction
What Is Conduction:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Conduction is one of three ways that thermal energy can be... |
NDQ_017350 | conduction occurs when particles of matter collide. | a. true, b. false | a | Lesson: heat conduction
What Is Conduction:
Conduction is the transfer of thermal energy between particles of matter that are touching. Thermal energy is the total kinetic energy of moving particles of matter, and the transfer of thermal energy is called heat. Conduction is one of three ways that thermal energy can be... |
NDQ_017353 | a hot-water heating system includes | a. ducts, b. pipes, c. registers, d. two of the above | b | Lesson: heating systems
Heating the Home:
Modern home heating systems keep us comfortable in cold weather. We may even depend on them for our survival. But we often take them for granted. Two common types of home heating systems are hot-water and warm-air heating systems. Both types are described below. Thermal energy... |
NDQ_017354 | in a hot-water heating system, hot water transfers thermal energy to radiators by thermal radiation. | a. true, b. false | b | Lesson: heating systems
Heating the Home:
Modern home heating systems keep us comfortable in cold weather. We may even depend on them for our survival. But we often take them for granted. Two common types of home heating systems are hot-water and warm-air heating systems. Both types are described below. Thermal energy... |
NDQ_017355 | in both hot-water and warm-air heating systems, thermal energy is transferred through the air in each room by conduction. | a. true, b. false | b | Lesson: heating systems
Heating the Home:
Modern home heating systems keep us comfortable in cold weather. We may even depend on them for our survival. But we often take them for granted. Two common types of home heating systems are hot-water and warm-air heating systems. Both types are described below. Thermal energy... |
NDQ_017356 | a warm-air heating system includes | a. ducts, b. pipes, c. registers, d. two of the above | d | Lesson: heating systems
Heating the Home:
Modern home heating systems keep us comfortable in cold weather. We may even depend on them for our survival. But we often take them for granted. Two common types of home heating systems are hot-water and warm-air heating systems. Both types are described below. Thermal energy... |
NDQ_017372 | hydrocarbons are the simplest type of carbon compounds. | a. true, b. false | a | Lesson: hydrocarbons
What Are Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. Hydrocarbons are the simplest type of carbon-based compounds, but they can vary greatly in size. The smallest hydrocarbons have just one or two carbon atoms. The largest hydrocarbons may have thousands of carb... |
NDQ_017373 | hydrocarbon molecules | a. are polar, b. do not dissolve in water, c. are all liquids at room temperature, d. two of the above | b | Lesson: hydrocarbons
What Are Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. Hydrocarbons are the simplest type of carbon-based compounds, but they can vary greatly in size. The smallest hydrocarbons have just one or two carbon atoms. The largest hydrocarbons may have thousands of carb... |
NDQ_017374 | hydrocarbons are used to make | a. fuels, b. waxes, c. fabrics, d. all of the above | d | Lesson: hydrocarbons
What Are Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. Hydrocarbons are the simplest type of carbon-based compounds, but they can vary greatly in size. The smallest hydrocarbons have just one or two carbon atoms. The largest hydrocarbons may have thousands of carb... |
NDQ_017375 | the size of hydrocarbon molecules influences their melting and boiling points. | a. true, b. false | a | Lesson: hydrocarbons
What Are Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. Hydrocarbons are the simplest type of carbon-based compounds, but they can vary greatly in size. The smallest hydrocarbons have just one or two carbon atoms. The largest hydrocarbons may have thousands of carb... |
NDQ_017376 | hydrocarbons consist only of carbon and hydrogen atoms. | a. true, b. false | a | Lesson: hydrocarbons
What Are Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. Hydrocarbons are the simplest type of carbon-based compounds, but they can vary greatly in size. The smallest hydrocarbons have just one or two carbon atoms. The largest hydrocarbons may have thousands of carb... |
NDQ_017377 | saturated hydrocarbons | a. contain only single bonds between carbon atoms, b. contain as many hydrogen atoms as possible, c. are called alkanes, d. all of the above | d | Lesson: hydrocarbons
What Are Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. Hydrocarbons are the simplest type of carbon-based compounds, but they can vary greatly in size. The smallest hydrocarbons have just one or two carbon atoms. The largest hydrocarbons may have thousands of carb... |
NDQ_017378 | what is the general formula for a saturated hydrocarbon? | a. cnh2n+2, b. cnh2n, c. cnh2n-2, d. none of the above | a | Lesson: hydrocarbons
What Are Hydrocarbons:
Hydrocarbons are compounds that contain only carbon and hydrogen. Hydrocarbons are the simplest type of carbon-based compounds, but they can vary greatly in size. The smallest hydrocarbons have just one or two carbon atoms. The largest hydrocarbons may have thousands of carb... |
NDQ_017381 | elements in group 1 of the periodic table include | a. sodium, b. hydrogen, c. calcium, d. two of the above | d | Lesson: hydrogen and alkali metals
The First Group:
Sodium (Na) is an element in group 1 of the periodic table of the elements. This group (column) of the table is shown in Figure below. It includes the nonmetal hydrogen (H) and six metals that are called alkali metals. Elements in the same group of the periodic table... |
NDQ_017382 | how many valence electrons do alkali metals have? | a. 1, b. 2, c. 3, d. 4 | a | Lesson: hydrogen and alkali metals
The First Group:
Sodium (Na) is an element in group 1 of the periodic table of the elements. This group (column) of the table is shown in Figure below. It includes the nonmetal hydrogen (H) and six metals that are called alkali metals. Elements in the same group of the periodic table... |
NDQ_017383 | hydrogen and alkali metals are very reactive. | a. true, b. false | a | Lesson: hydrogen and alkali metals
The First Group:
Sodium (Na) is an element in group 1 of the periodic table of the elements. This group (column) of the table is shown in Figure below. It includes the nonmetal hydrogen (H) and six metals that are called alkali metals. Elements in the same group of the periodic table... |
NDQ_017384 | the most reactive alkali metal is lithium. | a. true, b. false | b | Lesson: hydrogen and alkali metals
The First Group:
Sodium (Na) is an element in group 1 of the periodic table of the elements. This group (column) of the table is shown in Figure below. It includes the nonmetal hydrogen (H) and six metals that are called alkali metals. Elements in the same group of the periodic table... |
NDQ_017385 | characteristics of alkali metals include | a. softness, b. high density, c. liquid state at room temperature, d. two of the above | a | Lesson: hydrogen and alkali metals
The First Group:
Sodium (Na) is an element in group 1 of the periodic table of the elements. This group (column) of the table is shown in Figure below. It includes the nonmetal hydrogen (H) and six metals that are called alkali metals. Elements in the same group of the periodic table... |
NDQ_017388 | the alkali metal named francium is radioactive. | a. true, b. false | a | Lesson: hydrogen and alkali metals
The First Group:
Sodium (Na) is an element in group 1 of the periodic table of the elements. This group (column) of the table is shown in Figure below. It includes the nonmetal hydrogen (H) and six metals that are called alkali metals. Elements in the same group of the periodic table... |
NDQ_017392 | water is a polar compound. | a. true, b. false | a | Lesson: hydrogen bonding
What Are Polar Compounds:
Polar compounds, such as water, are compounds that have a partial negative charge on one side of each molecule and a partial positive charge on the other side. All polar compounds contain polar bonds (although not all compounds that contain polar bonds are polar.) In ... |
NDQ_017396 | hydrogen bonds are very strong bonds. | a. true, b. false | b | Lesson: hydrogen bonding
What Are Polar Compounds:
Polar compounds, such as water, are compounds that have a partial negative charge on one side of each molecule and a partial positive charge on the other side. All polar compounds contain polar bonds (although not all compounds that contain polar bonds are polar.) In ... |
NDQ_017397 | in water, hydrogen bonds hold together | a. hydrogen and oxygen atoms in the same molecule, b. hydrogen and oxygen atoms in different molecules, c. hydrogen atoms in different molecules, d. hydrogen atoms in the same molecule | b | Lesson: hydrogen bonding
What Are Polar Compounds:
Polar compounds, such as water, are compounds that have a partial negative charge on one side of each molecule and a partial positive charge on the other side. All polar compounds contain polar bonds (although not all compounds that contain polar bonds are polar.) In ... |
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