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.
2. Record how long it takes for each object to hit the ground.
3. ?
Which step should be next?
(1 point)
• Drop the balls from a different height.
• Perform a second trial.
• Choose new balls.
• Measure the mass of the balls again.