Chapter 1 Energy Assessment

Which type of energy is formed by vibrating objects?

• light energy

• sound energy

• thermal energy

• electrical energy

Which type of energy does moving water have?

• electrical

• kinetic

• thermal

• potential

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A guitarist strums two strings of the same thickness on a guitar. The first string vibrates more quickly than the second string. What is true about the pitch of the strings?

• The first string has a higher pitch than the second string.

• The second string has a higher pitch than the first string.

• The first string and the second string have the same pitch.

• The pitch of the second string depends on the pitch of the first string.

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Which is the best description of a sound wave when the pitch of the sound is very high?

• It has a low frequency.

• It has a high frequency.

• It has no wavelength.

• It has no frequency.

How do white light waves act when they enter a prism?

• They are reflected.

• They become raindrops.

• They bend or refract.

• They are absorbed.

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Which of the following can act like a prism?

• a radio

• a raindrop

• a piece of paper

• a laser

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Look carefully at the illustration. How is heat transferred from the campfire to the people?

• conduction

• insulation

• convection

• radiation

Which of the following shows convection?

• The sun warms your skin.

• You rub your hands together quicky.

• A metal spoon in soup becomes hot.

• A mobile turns from a candle burning below it. (A mobile hangs above a baby's crib.)

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Explain why ice might melt after you have skated on it.

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If you want to stay cool on a sunny day, which is better to wear: a black T-shirt or a white T-shirt? Explain your answer.

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