How can a stationary metal sphere have kinetic energy, the energy of motion? (2 points)
Responses
a. The metal is made of atoms which are vibrating in place.
b. The metal sphere can be rolled
c. The metal is made of atoms, which store potential energy.
d. The metal molecules are moving around.
Question 2
What do you measure when you find a substance's temperature? (2 points)
Responses
a. Absolute heat of the substance
b. Average kinetic energy of the particles in the substance
c. Kinetic energy of the substance
d. Potential energy of the substance
Question 3
What happens when thermal energy is applied to an ice cube? (2 points)
Responses
a. Its water molecules gain kinetic energy and move around.
b. Its water molecules lose potential energy
c. Its water molecules lose kinetic energy, so the ice cubes melt.
d. Its water molecules gain potential energy.
Question 4
Why does an ice cube melt even in a cold glass of water? (2 points)
Responses
a. The ice cube is still colder than the water, so thermal energy moves from the ice cube to the water.
b. The water is still warmer than the ice cube, so thermal energy moves from the water to the ice cube.
c. Ice cubes must always melt eventually
d. The air around the water melts the ice cube.
Question 5
Which scenario best describes a scientist studying thermal energy? (2 points)
Responses
a. She works with a team, telling each member exactly what to do.
b. She works alone to research and carry out the project.
c. She works on a team, with each member performing a different role in the project.
d. She works on a team, with each member carrying out the same tasks together.
Question 6
What is the best description of the conclusion of a scientific investigation? (2 points)
Responses
a. The conclusion is the final step of the investigation before it is written.
b. The conclusion states that the results are correct.
c. The conclusion uses reasoning to explain and interpret the results.
d. The conclusion uses reasoning to justify the results.
Question 7
How does a heater in one area of a fish aquarium warm the whole aquarium? (2 points)
Responses
a. The heater warms the glass which warms the water.
b. The heater warms the air above the aquarium which warms the water.
c. The heater adds thermal energy evenly to the aquarium’s water.
d. The heater creates convection currents, which transfer warmer water away from the heater and cooler water toward the heater.
Question 8
What happens when a cold spoon is placed in hot soup?(2 points)
Responses
a. The spoons have less kinetic energy, so they transfer thermal energy to the soup.
b. The soup’s molecules have the same kinetic energy as the spoon’s molecules, so there is no transfer of thermal energy.
c. The soup’s molecules have more potential energy, so they transfer more energy to the spoon.
d. The soup’s molecules have more kinetic energy, so they transfer thermal energy to the spoon.
what are the right answers
Question 1: (a) The metal is made of atoms which are vibrating in place.
Question 2: (b) Average kinetic energy of the particles in the substance
Question 3: (a) Its water molecules gain kinetic energy and move around.
Question 4: (a) The ice cube is still colder than the water, so thermal energy moves from the ice cube to the water.
Question 5: (c) She works on a team, with each member performing a different role in the project.
Question 6: (c) The conclusion uses reasoning to explain and interpret the results.
Question 7: (d) The heater creates convection currents, which transfer warmer water away from the heater and cooler water toward the heater.
Question 8: (d) The soup’s molecules have more kinetic energy, so they transfer thermal energy to the spoon.