Energy Review

In which of these situations is electrical energy present?

• tying shoes

• raking leaves

• throwing a baseball

• vacuuming the floor

Which two types of energy come directly from the Sun?

• heat and light

• heat and sound

• electrical and light

• electrical and heat

What is the main type of energy released by a trumpet?

• heat

• light

• sound

• electrical

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Dominick and Anthony are helping to move their grandmother's things to a new apartment. They are using a cart to move their grandmother's things from the truck into the building.

What will need to happen for the cart to move faster?

• They will need to change energy to go faster

• They will need to add energy to push the cart faster

• They will need to remove energy to make the cart faster

• They will need to push the cart backwards to make the cart faster

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Joey and her sister left their very cold smoothie drinks on the kitchen table. What happens when the energy in the kitchen increases?

• the drinks will get warmer

• the drinks will not change

• the drinks will get colder

• the drinks will freeze

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Lina charges her mechanical toothbrush overnight by plugging it into a wall outlet. What form of energy is Lina most likely using?

• electrical

• heat

• light

• magnetic

Steven stretches a rubber band between his fingers, as shown below. When he plucks the rubber band, it makes a sound. Which of the following best explains why the rubber band makes a sound when Steven plucks it?

• it heats the air

• it vibrates the air

• it absorbs energy from the air

• it releases molecules into the air

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Henry sings a few low notes. When he sings his voice box vibrates. What happens when the vibrations in his voice box get faster?

• the pitch increases

• the pitch decreases

• the volume increases

• the volume decreases

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Which of the following sounds has the lowest pitch?

• a squeaky chair

• a little dog howling

• a mouse squeaking

• a basketball bouncing

City planners want to use a renewable form of energy, hydropower, to provide electricity to a town of 25,000 people. Which of these energy sources would fit with their plan?

• coal

• natural gas

• solar power

• a large river

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