8th Grade Energy Transformation Quiz

Which of the following best describes the law of conservation of energy?

• a. Energy can be created but not destroyed.

• b. Energy can be destroyed but not created.

• c. Energy can be neither created nor destroyed.

• d. Energy can be created and destroyed.

What is the term used to describe the transfer of heat through direct contact or collision of atoms?

• a. Conduction

• b. Radiation

• c. Convection

• d. Transformation

Which of the following is an example of conduction?

• a. A pot of water boiling on a stove

• b. Sunlight warming the Earth's surface

• c. A fan cooling down a room

• d. A hot air balloon rising in the sky

How does heat transfer occur through radiation?

• a. Through direct contact or collision of atoms

• b. Through the movement of currents in a liquid or gas

• c. Through the emission of electromagnetic waves

• d. Through the transfer of thermal energy by particles

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Which of the following best describes convection?

• a. Transfer of heat through direct contact or collision of atoms

• b. Transfer of heat through the emission of electromagnetic waves

• c. Transfer of heat through the movement of currents in a liquid or gas

• d. Transfer of heat through the transfer of thermal energy by particles

What is the primary source of radiant energy on Earth?

• a. The Sun

• b. Lightning

• c. Volcanoes

• d. Nuclear reactors

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Which type of heat transfer is responsible for the circulation of air in a room when a heater is turned on?

• a. Conduction

• b. Radiation

• c. Convection

• d. Transformation

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What happens to the molecules of a substance when heat is transferred through conduction?

• a. They move faster and collide more frequently.

• b. They emit electromagnetic waves.

• c. They form currents in a liquid or gas.

• d. They transform into a different substance.

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Which of the following is an example of convection?

• a. A metal spoon heating up when placed in hot soup

• b. A person feeling warmth from sitting close to a fireplace

• c. A pot of water boiling on a stove

• d. A cold drink becoming warmer when left outside on a hot day

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Which of the following is an example of radiation?

• a. A metal spoon heating up when placed in hot soup

• b. A person feeling warmth from sitting close to a fireplace

• c. A pot of water boiling on a stove

• d. Sunlight heating up the Earth's surface