force and motion

A push or a pull changes an object’s

• size

• motion

• mass

• temperature

A ball moves from X to Y on the floor. Which best explains the change in the ball? The ball –

• was observed

• is made of rubber

• was pushed

• is very heavy

A pull can be used to do all of the following EXCEPT

• open a door.

• move a wagon.

• lift some rocks.

• boil some water.

An air rocket is launched several times and for each launch the number of pumps was recorded as well as the height reached by the rocket. If the pattern shown in the data continues, how many pumps would it take for the rocket to reach a height of 15 meters?

• 25

• 30

• 35

• 40

All of the actions below would probably move a book EXCEPT

• standing on top of the book.

• pushing the book off a table.

• pulling a rug that the book is on.

• kicking the book across the floor.

Students have short and tall ramps and toy cars with which to create an investigation. Which of the following is a testable question students could answer in an investigation using these materials?

• What kind of material should be used to make roads?

• What kind of toy car is the overall best kind to buy?

• How does ramp height affect the distance the toy car rolls?

• What kind of scientist can best explain how cars work?

By changing the surface over which a ball rolls, students could investigate the effect of which of the following?

• Magnetism

• Electricity

• rotation

• friction

Which two tools below would be most useful in investigating how the mass of an object can affect the distance it moves with a push?

• Spring scale and hot plate

• Balance and meter stick

• Graduated cylinder and beaker

• Magnet and thermometer

Which of the following describes the best way to investigate the strength of several different magnets?

• Place each magnet in water to see if it sinks.

• Count how many paper clips each magnet can pick up.

• Use tools to measure the mass and length of each magnet.

• Place the magnets near each other to see how they move

Students conducted an investigation in which they rolled marbles across different surfaces to measure the effect of the force of friction on each surface. Friction slows down and stops objects. Which of the surfaces investigated showed the greatest amount of friction?

• Surface A

• Surface B

• Surface C

• Surface D