Unit 4: Force, Motion and Energy

Friction is a force that —

• equals motion

• opposes motion

• creates motion

• needs motion

Kinetic energy allows you to —

• think

• sleep

• knock over pins with a bowling ball

• hold a bowling ball

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Ben spent an afternoon observing the motion of a turtle. He recorded his observations in the table below.

If the turtle’s pattern continues, how far away from the pond will he be at 3:30 pm?

• 24 feet

• 42 feet

• 30 feet

• 18 feet

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The wall below is in danger of being blown over by hurricane winds. In what direction should a force be applied to help keep the wall from falling over?

• towards the right

• towards the left

• upwards

• downwards

Objects can be made to move from one position to another. They can be made to move faster, slower, change direction, or stop. What causes this movement?

• directions cause motion

• speed causes motion

• height causes motion

• forces cause motion

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Kaleb rolled his miniature skateboard off the table. It landed on thick carpet. What hypothesis can you make about the toy skateboard’s movement once it was on the carpet?

• The carpet quickly stopped the skateboard from rolling any further.

• The skateboard continued to roll, at the same speed.

• Once on the carpet, the skateboard rolled even faster.

• The skateboard rolled faster on the carpet, then stopped.

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Which force would bring the greatest change in motion to a moving car?

• rolling over a speed bump

• rolling over a small pot-hole in the road

• running into a brick wall

• running into a deer crossing the street

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A hypothesis (or educated guess) must contain which two words?

• I think

• If, then

When Jack is sanding some wood furniture, he notices that his hand gets warmer and warmer as he rubs the sandpaper on the wood. Which concept best explains why this happens?

• motion

• force

• momentum

• friction

An object's position can be described as its...

• direction

• speed

• location

• force