A student designs a gravity experiment. She will time how long it takes different objects to fall from her school’s roof to the ground. She will use three objects: a 2-foot-long board, a toy car, and a paper bag. What is wrong with her experiment’s design?(1 point)

Question

Responses

Gravity will not affect how long it takes for the objects to fall to the ground.
Gravity will not affect how long it takes for the objects to fall to the ground.

The experiment does not test enough objects.
The experiment does not test enough objects.

The objects do not have the same size, shape, or mass, so any differences in drop times cannot be attributed to one variable.
The objects do not have the same size, shape, or mass, so any differences in drop times cannot be attributed to one variable.

The school roof is not tall enough to test the effect of gravity on different objects.

Answer 1

The correct response is:

The objects do not have the same size, shape, or mass, so any differences in drop times cannot be attributed to one variable.

In this experiment, the differences in the physical characteristics of the objects (size, shape, and mass) can influence their fall times due to air resistance and other factors. For a more accurate test of how gravity affects different objects, the student should use objects that are more similar in design while allowing for a fair comparison.