Thermal Energy Transfers and Systems Worksheet

What is the main topic of the lesson shown on the page?

• Thermal Energy Transfers

• Chemical Reactions

• Electrical Circuits

• Photosynthesis

What happens to food in a microwave after it is heated and then left to sit?

• It loses thermal energy and becomes cold again

• It gains more energy and becomes hotter

• It changes color

• It becomes electrically charged

What is the key concept question for this lesson?

• In which direction does heat flow from one object to another?

• How do plants make food?

• What is the speed of light?

• How do magnets work?

What do objects make up according to the text?

• Systems

• Atoms

• Molecules

• Elements

What should students do before reading the lesson, according to the "Before You Read" section?

• Decide whether they agree or disagree with the given statements

• Write a summary of the lesson

• Draw a diagram

• Answer all the questions at the end

What is conduction?

• The transfer of thermal energy between matter by the collisions of particles.

• The transfer of energy by electromagnetic waves.

• The process of cooling by adding coldness.

• The transfer of energy by chemical reactions.

What happens when you burn your fingers on a hot pan?

• Thermal energy moves from the hot pan to your cooler skin.

• Thermal energy moves from your skin to the pan.

• No energy is transferred.

• The pan becomes cooler.

What happens to the temperature difference between a hot cup of tea and the air as time passes?

• It decreases.

• It increases.

• It stays the same.

• It disappears instantly.

How does a toaster heat toast if the coils and bread are not in contact?

• By radiation

• By conduction

• By convection

• By evaporation

How does radiation differ from conduction?

• Radiation can occur between objects that are not touching.

• Radiation only happens in solids.

• Radiation requires direct contact.

• Radiation cannot transfer energy.