Forms of Energy and Force/Motion Review

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass. Which question is this investigation most likely designed to answer?

• How do block of different sizes react to force?

• How do different surfaces affect the amount of force needed to move a block?

• How do blocks affect spring scales?

• How does the mass of a block change when it is pulled across a desk?

Which experiment listed below will best determine how friction affects the speed of a rolling object?

• Roll 3 objects of various sizes across the floor.
• Roll 3 objects of equal size from various heights across the floor.
• Roll 3 objects of equal size across 3 different types of surfaces.
• Roll 3 objects of equal size from equal heights across the floor.

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Which word describes a push or pull on an object?

• Position
• Hypothesis
• Mass
• Force

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A polar bear slides down an ice covered hill. As he slides, he slows down. Eventually he comes to a stop. What force  acts on an object to slow or stop its motion?

• Speed
• Friction
• Gravity
• Direction

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When conducting an experiment, in order to get reliable results, it is important to:

• Disregard results that do not match your hypothesis
• Test many different variables at the same time
• Test all forces at the same time
• Repeat the investigation several times

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Looking at the picture, what two tools would be needed to measure the effect of friction on the ball?

• Hand lens and balance
• Balance and spring scale
• Measuring tape and stop watch
• Spring scale and hand lens

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When designing an experiment, why is it important to test only one variable?

• Testing one variable explains what  caused the change once data has been gathered.
• Testing one variable collects inaccurate data and repeats the investigation more than necessary.
• Testing one variable decreases the reliability of the investigation.
• It is not necessary to test only one variable.

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To make an object move, it must be pushed or pulled with ____________.

• force

• direction

• gravity

• friction

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When a ball is kicked, ______________ causes the ball to change location.

• position

• movement

• gravity

• friction

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A ball rolled on a carpet will not travel as far as a ball rolled on ice because of the ______________ slowing the ball on the carpet down.

• gravity

• friction

• force

• motion

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