Use the table of criteria for an investigation to answer the question.

Question

Object To Be Dropped Drop Height (meters)
10-gram ball 5
5-gram ball 8
18-gram ball 10

A student designs an investigation to study the effect of gravity on objects on Earth. He will use the criteria shown. How can the student improve the investigation?

A.) by finding balls made from different materials

B.) by measuring the circumference of the balls

C.) by using balls that are the same mass

D.) by dropping the balls from the same height

Answer 1

C.) by using balls that are the same mass

Answer 2

IT WAS D