Energy - Lesson 2 Quiz

An ice cube is placed in a glass of warm tea. Later, the ice has melted, and the tea is cooler. What is true about the transfer of energy?

• Heat has been transferred from the ice cube to the warm tea.

• Light energy from the warm tea has been transferred to the ice cubes.

• Heat from the warm tea has been transferred to the ice cubes and the glass.

• Electrical energy has been transferred from the tea to the surrounding air and glass.

What energy transfer occurs in a solar panel?

• Heat is transferred to the panel when it is connected to an electrical source.

• Electrical energy is transferred to the panel when it is connected with an electrical source.

• Energy is transferred to the panel when light waves from the sun are absorbed by the panel.

• Mechanical energy is transferred to the panel when waves from the sun push against the panel and move it.

Which of these is an example of how heat can transfer by touching an object?

• the sun heating a pond

• snow melting on a hot day

• a person keeping warm by a fire

• warming hands on a cup of hot chocolate

Through which of these materials do sound waves travel most slowly?

• air

• iron

• wood

• water

Which form of energy results from vibrations that travel through air?

• sound energy

• potential energy

• electrical energy

• chemical energy

Identify the cup of water that has the most energy. Explain your answer.