Unit 2 - Energy Review

How do dolphins communicate?

• By using light waves

• By using special vibrations and sounds

• By using magnetic fields

• By using heat energy

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What affects the strength of an electromagnet?

• The color of the battery

• The size of the battery

• The stored energy of the battery

• The weight of the battery

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In which path does light travel?

• In a circular path

• In a straight path

• In a curved path

• In a zigzag path

Why are sounds not heard in space?

• Because space is too cold

• Because space is too bright

• Because space is too noisy

• Because space is a vacuum

How does sound energy travel?

• In a circular motion

• In a straight line

• In a zigzag pattern

• In waves

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Can sound waves travel through empty space?

• Only sometimes

• No

• It depends

• Yes

What does a pom-pom launcher transform stored energy into?

• Energy of motion

• Heat energy

• Sound energy

• Light energy

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How does the sound from a guitar travel to your ears?

• Through magnetic waves

• Through heat waves

• Through light waves

• Through sound waves

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Why is aluminum an excellent thermal conductor?

• Because it is shiny

• Because it is magnetic

• Because it conducts heat easily

• Because it is heavy

How does the heat from the Sun travel to the Earth?

• Through reflection

• Through convection

• Through radiation

• Through conduction