CBA 2 Review

Dante wants to know what surface would be easiest to ride his skateboard on. He investigates the following surfaces: sand, concrete, and gravel. What force is he investigating?

• Force

• Friction

• Gravity

• Magnetism

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When playing tennis, how does gravity affect the ball?

• Pulls it up

• Pushes it to the right

• Pulls it down

• Pushes it to the left

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To investigate the force of magnetism, you could use all of the following EXCEPT–

• iron filings.

• paper clips.

• rubber bands.

• magnets.

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Pham did an experiment with a block of wood, a spring scale, and different types of fabric. She used the spring scale to see how much force was needed to pull the block of wood across the table with different types of fabric on top. What question was Pham most likely investigating?

• How do you use a spring scale?

• How do different surfaces affect how far the block is pulled?

• How does magnetism affect how far the block is pulled?

• How does gravity affect how far the block is pushed?

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Students were investigating friction by rolling a car down a ramp. Which surface would help the car go a longer distance?

• Foil because it provides more friction

• Carpet because it provides more friction

• Foil because it provides less friction

• Carpet because it provides less friction

Which term refers to the speed at which sound waves travel?

• volume

• amplitude

• frequency

When you move the pedals to ride a bike, what form of energy are you using?

• Light

• Mechanical

• Sound

• Thermal

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A kazoo is a small, narrow, tube-like instrument that you can hum into to play music. Which of the following shows evidence that a humming sound transfers energy through a kazoo?

• The sides of the kazoo vibrate slightly when someone hums into it.

• The kazoo can make high-pitched sounds.

• The kazoo can make low-pitched sounds.

• The kazoo stops making sound when the person stops humming.

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When using a pot on the stove, why would a handle be plastic and not metal?

• The plastic is a conductor of thermal energy.

• The plastic is an insulator of thermal energy.

• The metal is an insulator of thermal energy.

• The plastic transfers the thermal energy to the pot.

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Sanju is building a homemade grill. What material would be best for her to use for the grates that she cooks the food on?

• Iron

• Marble

• Foam

• Wood

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