Question

Question
Use the table of criteria for an investigation to answer the 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?

(1 point)
Responses

by finding balls made from different materials
by finding balls made from different materials

by dropping the balls from the same height
by dropping the balls from the same height

by using balls that are the same mass
by using balls that are the same mass

by measuring the circumference of the balls
by measuring the circumference of the balls
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Answer 1

To improve the investigation, the best response is:

**by dropping the balls from the same height**

This would control the variable of drop height and allow the student to isolate the effect of gravity on the falling objects. All balls would then fall under the same gravitational conditions, making the results more comparable.