1. There are two pieces of copper. Piece A is at 70 degrees, while piece B is at 150 degrees. Which piece has more thermal energy?(1 point)
Responses
Piece B, because its particles move faster
Piece B, because its particles move faster
Piece B, because its particles move slower
Piece B, because its particles move slower
Piece A, because its particles move slower
Piece A, because its particles move slower
Piece A, because its particles move faster
Piece A, because its particles move faster
Question 2
2. The electrons in the copper atoms in a wire start to move when an electric potential difference is introduced. Which statement about this situation is true?(1 point)
Responses
The microscopic movement of the electrons creates a microscopic flow of electricity.
The microscopic movement of the electrons creates a microscopic flow of electricity.
The macroscopic movement of the electrons creates a macroscopic flow of electricity.
The macroscopic movement of the electrons creates a macroscopic flow of electricity.
The microscopic movement of the electrons creates a macroscopic flow of electricity.
The microscopic movement of the electrons creates a macroscopic flow of electricity.
The macroscopic movement of the electrons creates a microscopic flow of electricity.
The macroscopic movement of the electrons creates a microscopic flow of electricity.
Question 3
3. Which statement describes the gravitational energy and energy stored in a magnetic field when objects are drawn close to each other?(1 point)
Responses
Both gravitational energy and energy stored in a magnetic field repel.
Both gravitational energy and energy stored in a magnetic field repel.
Both gravitational energy and energy stored in a magnetic field attract.
Both gravitational energy and energy stored in a magnetic field attract.
Gravitational energy attracts; energy stored in a magnetic field repels.
Gravitational energy attracts; energy stored in a magnetic field repels.
Gravitational energy attracts; energy stored in a magnetic field attracts or repels.
Gravitational energy attracts; energy stored in a magnetic field attracts or repels.
Question 4
4. A scientist is heating a piece of metal and measuring its temperature. She observes that the temperature of the metal is rapidly increasing. Which statement is correct about the thermal energy of the metal?(1 point)
Responses
Thermal energy will increase for as long as the potential energy is zero.
Thermal energy will increase for as long as the potential energy is zero.
Thermal energy will increase for as long as the metal is absorbing heat energy.
Thermal energy will increase for as long as the metal is absorbing heat energy.
Thermal energy will increase for as long as the metal is in solid state.
Thermal energy will increase for as long as the metal is in solid state.
Thermal energy will increase for as long as temperature is increasing.
Thermal energy will increase for as long as temperature is increasing.
Question 5
5. A student places a piece of ice inside a glass beaker at room temperature and heats them until they both come to 70°C. Which statement is correct about the energies of the ice and beaker?(1 point)
Responses
The potential energy of both the ice and beaker have increased the same amount.
The potential energy of both the ice and beaker have increased the same amount.
The kinetic energy of both the ice and beaker have increased the same amount.
The kinetic energy of both the ice and beaker have increased the same amount.
The thermal energy of the ice has increased more than the thermal energy of the beaker.
The thermal energy of the ice has increased more than the thermal energy of the beaker.
The thermal energy of the ice has decreased more than the thermal energy of the beaker.
The thermal energy of the ice has decreased more than the thermal energy of the beaker.
Question 6
6. Which energy types are both examples of energy on a macroscopic scale?(1 point)
Responses
thermal energy and spring potential energy
thermal energy and spring potential energy
chemical energy and gravitational potential energy
chemical energy and gravitational potential energy
gravitational potential energy and kinetic energy
gravitational potential energy and kinetic energy
kinetic energy and thermal energy
kinetic energy and thermal energy
Question 7
7. A high diver steps off the diving platform and begins falling toward the pool of water below. Which statement about this situation is correct?(1 point)
Responses
The gravitational potential energy of the diver decreases as it changes to kinetic energy.
The gravitational potential energy of the diver decreases as it changes to kinetic energy.
The kinetic energy of the diver decreases as the diver approaches the water.
The kinetic energy of the diver decreases as the diver approaches the water.
The kinetic energy of the diver decreases as the diver approaches the water.
The kinetic energy of the diver decreases as the diver approaches the water.
The amount of energy that is transferred to thermal energy due to friction will be greater at the the top of the fall than at the bottom of the fall.
The amount of energy that is transferred to thermal energy due to friction will be greater at the the top of the fall than at the bottom of the fall.
Question 8
8. For a system that contains a rock falling through the air, which situation is always true?(1 point)
Responses
The total energy of the system is conserved.
The total energy of the system is conserved.
The total potential energy of the system is conserved.
The total potential energy of the system is conserved.
The total mechanical energy of the system is conserved.
The total mechanical energy of the system is conserved.
The total kinetic energy of the system is conserved.
The total kinetic energy of the system is conserved.
Question 9
9. A gas leak where methane gas combines with oxygen in the air can start a fire, releasing its energy at ignition temperature.
What does the ignition have to do with this chemical reaction?
(1 point)
Responses
The ignition forces atoms to combine and start a reaction.
The ignition forces atoms to combine and start a reaction.
The ignition provides the energy to break the bonds in molecules and start the reaction.
The ignition provides the energy to break the bonds in molecules and start the reaction.
The ignition targets methane gas only and releases oxygen before the fire.
The ignition targets methane gas only and releases oxygen before the fire.
The ignition adds more atoms to increase its energy during the reaction.
The ignition adds more atoms to increase its energy during the reaction.
Question 10
10. Gasoline has various chemicals that contain large amounts of chemical potential energy that is released when burned in a car engine.
What happens to the energy produced by burning gasoline in a car engine?
(1 point)
Responses
Some of the energy is lost as heat.
Some of the energy is lost as heat.
The energy released is less than the energy absorbed by the molecules.
The energy released is less than the energy absorbed by the molecules.
None of the energy is transformed but is sustained as work to run the engine.
None of the energy is transformed but is sustained as work to run the engine.
The energy multiplies to keep the engine running.
The energy multiplies to keep the engine running.
Question 11
11. The reaction between methane gas and oxygen to produce carbon dioxide and water is an exothermic process. Which statement describes the energy in the system?(1 point)
Responses
The chemical energy of the reactants is greater than the chemical energy of the products. Energy is released to the surroundings.
The chemical energy of the reactants is greater than the chemical energy of the products. Energy is released to the surroundings.
The chemical energy of the reactants is greater than the chemical energy of the products. Energy is absorbed from the surroundings.
The chemical energy of the reactants is greater than the chemical energy of the products. Energy is absorbed from the surroundings.
The chemical energy of the reactants is less than the chemical energy of the products. Energy is released to the surroundings.
The chemical energy of the reactants is less than the chemical energy of the products. Energy is released to the surroundings.
The chemical energy of the reactants is less than the chemical energy of the products. Energy is absorbed from the surroundings.
The chemical energy of the reactants is less than the chemical energy of the products. Energy is absorbed from the surroundings.
Question 12
12. How does the energy in the light of the aurora borealis compare to the energy as an excited electron returns to its original energy level?(1 point)
Responses
equal to
equal to
half of the energy
half of the energy
twice the energy
twice the energy
one-third of the energy
one-third of the energy
Question 13
13. A solar flare causes the sun to release a large number of particles along with excess amounts of electromagnetic radiation. Which helps prevent this radiation from harming Earth’s living organisms?(1 point)
Responses
Earth’s magnetic field absorbs most of this radiation.
Earth’s magnetic field absorbs most of this radiation.
Earth’s magnetic field deflects most of this radiation.
Earth’s magnetic field deflects most of this radiation.
Satellites directly deflect most of this radiation.
Satellites directly deflect most of this radiation.
Satellites indirectly absorb most of this radiation.
Satellites indirectly absorb most of this radiation.
Question 14
14. Several energy transfers occur during the process of the aurora borealis. During which transfer is the energy the greatest?(1 point)
Responses
Electrons from the sun transfer energy to atoms in the atmosphere.
Electrons from the sun transfer energy to atoms in the atmosphere.
Electrons in the atoms jump to a higher energy level.
Electrons in the atoms jump to a higher energy level.
Electrons fall and release energy as light.
Electrons fall and release energy as light.
Energy is the same at each step.
Energy is the same at each step.
Question 15
15. Which of the following IS NOT a reason why a person feels cold when rubbing alcohol is applied to skin?(3 points)
Responses
Evaporation is an endothermic process.
Evaporation is an endothermic process.
Our skin is colder than rubbing alcohol.
Our skin is colder than rubbing alcohol.
Rubbing alcohol takes heat from our skin to evaporate.
Rubbing alcohol takes heat from our skin to evaporate.
When our skin releases heat, it feels cold.
When our skin releases heat, it feels cold.
Skip to navigation
The correct answers to the questions are as follows:
1. Piece B, because its particles move faster
2. The microscopic movement of the electrons creates a macroscopic flow of electricity.
3. Gravitational energy attracts; energy stored in a magnetic field repels.
4. Thermal energy will increase for as long as the metal is absorbing heat energy.
5. The thermal energy of the ice has increased more than the thermal energy of the beaker.
6. gravitational potential energy and kinetic energy
7. The gravitational potential energy of the diver decreases as it changes to kinetic energy.
8. The total mechanical energy of the system is conserved.
9. The ignition provides the energy to break the bonds in molecules and start the reaction.
10. Some of the energy is lost as heat.
11. The chemical energy of the reactants is greater than the chemical energy of the products. Energy is released to the surroundings.
12. equal to
13. Earth’s magnetic field deflects most of this radiation.
14. Energy is the same at each step.
15. Our skin is colder than rubbing alcohol.