Science Unit 1 Test

What is science? (choose all that are correct)

• an opinion about things that are made by people

• an explanation about how things work

• a body of evidence that has been collected

• a way of learning about nature

Which of these objects are exerting contact forces on each other? Choose all that are correct.

• a bat hitting a baseball

• Earth in orbit around the sun

• a bicycle leaning against a wall

• a leaf falling to the ground

What can change when the forces acting on an object are unbalanced? Choose all that are correct.

• the object's speed

• the object's strength

• the object's direction of motion

• the object's weight

In which of the following are balanced forces acting on an object? Choose all that are correct.

• an apple falling from a tree to the ground

• a book resting on a desk

• a soccer player kicking the ball toward the goal

• a two teams in a tug-of-war that are not moving the rope

A push or a pull

• balanced forces

• net force

• force

• unbalanced forces

_____________ on an object cause the object to move.

• balanced forces

• net force

• force

• unbalanced forces

_____________ cancels each other out and do not cause an object to move

• balanced forces

• net force

• force

• unbalanced forces

A motion that repeats in a pattern

• irregular motion

• regular motion

Which sets of magnetic poles will attract each other?

• N, S

• N, N

• S, S

• E, W

An electric charge that builds up on an object. Mark only one oval.

• attract

• poles

• magnetic force

• magnets

• static electricity