Unit #2 & 3 SCA Review

Multiple Choice

Reina was skateboarding when she pushed her foot against the ground and then

kicked it behind her, as shown in the picture.

What happened when Reina kicked her foot against the ground?

• The skateboard began to rise up off the ground.

• The skateboard began to slow down.

• The skateboard began to speed up.

• The skateboard began to move backward.

Multiple Choice

What is the best way to move the child on the swing?

• Hold the swing

• Push the swing

• Spin the swing

• Sit on the swing

Multiple Choice

What type of force is used to throw the ball?

• A pull to move the ball across the field

• A push to move the ball away from the athlete

• Friction to make the ball move faster

• Gravity to keep the ball close to the ground

Multiple Choice

Which of the following is NOT an example of sound energy?

• A book on the table

• A tv set

• A phone ringing

• A cat meowing

Multiple Choice

Lisa left her flashlight on while she went in the living room. When she returned, she

noticed the flashlight felt warm when she picked it up. Which of the following is the

most likely reason that the flashlight was warm?

• Lisa left the flashlight near a heater.

• Lisa's hands got cold while she was in the living room.

• The battery in the flashlight is not working correctly.

• The flashlight produces heat as well as light.

Multiple Choice

What type of energy does a wind-up toy use?

• mechanical

• light

• thermal

• sound

Multiple Choice

Some cranes have the ability to pick up metal.

What kind of force allows the crane to pick up the metal?

• Magnetism

• Gravity

• Friction

• Heat

Multiple Choice

Sharon has two bar magnets sitting on her desk that are not moving. Which of the

following is a possible explanation?

• They are too far apart to attract or repel.

• Opposite poles are facing each other.

• Alike poles are facing each other.

• Magnets do not affect other magnets.

Multiple Choice

What effect does gravity always have on an object on Earth?

• makes the object move

• makes the object stay still

• pushes the object upward

• pulls the object downward