What Are Forces?
Which is a push or a pull?
A. force
B. friction
C. speed
A. force
What can you do to make a swing go higher?
A. push it more gently
B. push it harder
C. stop pushing
B. push it harder
Which object does a magnet attract?
A. a sheet of paper
B. a wood pencil
C. a steel paperclip
C. a steel paperclip
Which object would a magnet pick up?
A. a metal screw
B. a penny
C. a bar of soap
A. a metal screw
Which force causes a ball to fall to the ground?
Gravity
What claim can you make about how force affects the speed of an object?
A. When the force on an object increases, its speed increases.
B. When the force on a object increases, its speed decreases.
C. When the force on an object increases, its speed stays the same.
A. When the force on an object increases, its speed increases.
Which kinds of objects does a magnet attract?
A. objects made from steel or iron
B. objects made from rubber or cloth
C. objects made from paper or plastic
A. objects made from steel or iron
Which is true?
A. A magnet must touch an object to attract it.
B. A magnet does not have to touch an object to attract it.
C. A magnet must touch an object to repel it.
B. A magnet does not have to touch an object to attract it.
Think about riding a bike. Which force are you using to move the bike?
A. gravity
B. a magnet
C. a push
C. a push
You claim that lessening a force on a ball will lessen its
speed. What evidence supports this claim?.
A. The ball moved faster when you blew softly.
B. The ball moved more slowly when you blew softly.
C. The ball moved at the same speed no matter how softly you blew.
B. The ball moved more slowly when you blew softly.
Magnets sometimes repel one another. Why do they do this?
A. All magnets repel each other.
B. The same poles are facing each other. (N-N)
C. Different poles are facing each other. (N-S)
B. The same poles are facing each other.
You place a wood pencil next to a magnet. How do you know the pencil is not magnetic?
A. The magnet pulls the pencil.
B. The pencil does not move.
C. The pencil moves away from the magnet.
B. The pencil does not move.
Denise gently taps a golf ball with her club. Maria hits a golf ball with a lot of force. What will happen?
A. Maria’s ball will move faster than Denise’s ball.
B. Denise’s ball will move faster than Maria’s ball.
C. Both balls will travel at the same speed.
A. Maria’s ball will move faster than Denise’s ball.
You give a toy car a hard push. You give the same toy car a gentle push. How do you know the car will go faster with the hard push?
A. A greater force causes less change in motion.
B. A greater force causes a greater change in motion.
C. A greater force causes no change in motion.
B. A greater force causes a greater change in motion.
What happens if you put magnets of different poles (N-S) together?
A. The magnets attract each other.
B. Nothing happens.
C. The magnets repel each other.
A. The magnets attract each other.
A magnet picks up both paperclips and safety pins. Which claim is supported by this evidence?
A. The magnet attracts the safety pins and paper clips.
B. The magnet attracts the safety pins but not the paper clips.
C. The magnet attracts the paper clips but not the safety pins.
A. The magnet attracts the safety pins and paperclips
You blow softly on a ball. The ball crosses a finish line in 8 seconds. You blow hard on the ball. The ball crosses the finish line in 3 seconds. What happened when you used less force to move the ball?
A. The ball did not move.
B. The ball moved faster than when you blew hard.
C. The ball moved more slowly than when you blew hard.
C. The ball moved more slowly than when you blew hard.
You push a wagon gently. Then you push the same wagon hard. Which way of pushing the wagon will make it move more quickly?
A. Pushing hard and pushing gently will move the wagon at the same speed.
B. Pushing hard moves the wagon more quickly.
C. Pushing gently moves the wagon more quickly.
B. Pushing hard moves the wagon more quickly.
You place a piece of paper over a magnet. The covered magnet is still able to pick up a paperclip. Which claim is best supported by this evidence?
A. Magnets can attract objects without touching them.
B. Magnets repel paper clips.
C. Magnets must touch objects to attract them.
A. Magnets can attract objects without touching them.
Some children claim that blocking a magnet will affect its strength. How can you gather evidence for this claim?
A. Increase the distance between a magnet and objects it will attract.
B. Try to attract different objects, such as erasers.
C. Wrap something around the magnet and then try to attract objects to it.
C. Wrap something around the magnet and then try to attract objects to it.