A student wants to know if the effect of gravity is the same on all objects. She follows these steps:

1. Drop a 5-gram ball, a 10-gram ball, and a 12-gram ball from a height of 10 meters.
Record how long it takes for each object to hit the ground.
3.?

Measure the mass of the balls again
Choosing balls
Perform a second trial
Drop the ball from a different height

4. Repeat steps 1 and 2 with different objects of varying masses and heights to gather more data.

5. Compare the time it takes for each object to hit the ground and analyze if there is a pattern or trend.
6. Use the data collected to form a conclusion about whether the effect of gravity is the same on all objects.