Practice Test 10

Claim: Gravity is caused by air. Evidence: The balloon moved in air. Reasoning: Therefore, without air there would be no gravity pulling the ball down.

Claim: Gravity pulls some objects up and some objects down. Evidence: The balloon went up, and the ball went down. Reasoning: Therefore, gravity changes direction depending on the object.

Claim: Gravity pulls all objects toward Earth, but other forces can be stronger. Evidence: The ball fell to the floor, and the helium balloon rose to the ceiling. Reasoning: Because gravity pulls down on both, the ball falls, but the balloon rises because the air pushes it up more than gravity pulls it down.

Claim: Gravity does not affect balloons. Evidence: The balloon rose to the ceiling. Reasoning: Since it moved up, gravity must not pull on it at all.