LM4.Science.Unit3.Exam

What gives off the most thermal energy?



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Which would be a good thermal conductor?



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Tina tried three different types of cups for her hot chocolate: a plastic cup, a steel cup, and a paper cup with air pockets. Her hot chocolate stayed warmest in the paper cup with air pockets and got coldest in the steel cup.
Which cup was the worst thermal insulator?

• A. the paper cup with air pockets

• B. the plastic cup

• C. the steel cup

Which of the following gives off light energy?



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• A. any object that reflects light or produces light.

• B. objects that do not reflect light.

• C. light rays traveling through empty space.

• D. any object that absorbs light.

The Sun provides Earth with thermal energy and light energy. How does its thermal energy help us?

• A. The sun's thermal energy keeps the water cycle going by heating water.

• B. The sun's thermal energy helps us to see at night.

• C. The sun's thermal energy helps us see during the day.

Rowing in a boat is an example of what kind of eneroy?

• A. magnetic energy

• B. electrical energy

• C. kinetic energy

• D. light energy

Which of the following is an example of potential energy?

• A. water moving in a river

• B. a snake slithering through tall grass

• C. a sloth hanging from a tree branch

• D. an owl flying through the air

Which is an example of sound energy?

• A. a curling iron being used to curl hair

• B. a bee buzzing

• C. the light from a campfire

• D. the colors of a rainbow

Which of the following is powered by electrical energy?

• A. a rubber band

• B. a tennis ball

• C. gloves

• D. a coffee maker