Review 7.P.1.1, 1.2

What best describes motion?

• Change of speed over time

• Change in position over time

• Change of acceleration over time

• Change in velocity over time

Why do scientists use a reference point?

• To determine if an object is in motion

• To find information in the library

• To know where they are

• To measure speed

Which best explains why the cyclists (#3) cannot be used as a good reference point?

• It is heading in the wrong direction

• It is moving too slow

• It is moving too fast

• A good reference point should not move

A mother is on the train. To the boy, she looks like she is moving. To the mother, she isn’t. Why are the perspectives different?

• Distance

• Frame of reference

• Reference point

• Speed

What is the average speed of a cheetah that sprints 100m in 10s?

• 1m/s

• 10mph

• 10m/s

• 100m/s

The rollercoaster travels at 100mph. How long will it take to travel 200 miles?

• 1 hour

• 2 hours

• 0.5 hours

• 4 hours

You are riding your bike, from point A to B and then to C. Which number shows the displacement from your starting point to point C?

• 3 m

• 4 m

• 5 m

• 7 m

When one force in a pair is greater than the other, we call this:

• Balanced force

• Unbalanced force

• Magnitude

• Friction

When Anna tells her father that her bicycle is hard to pedal, he oils the chain. How does this make her bike easier to ride?

• Friction on the bike has increased

• Friction on the bike has decreased

• Gravity on the bike has increased

• Gravity on the bike has decreased

A person is pushing a lawnmower. Which best describes what is occurring?

• Inertia is being applied to the lawnmower

• Force is being applied to the lawnmower

• There is no friction acting on the lawn mower

• There is no gravity acting on the lawn mower