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

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

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

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

Answer 1

The correct response to identify the flaw in the experiment's design is:

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

This is important because in a controlled experiment, it’s necessary to isolate the variable being tested—in this case, the effect of gravity—by ensuring that all other factors, such as size, shape, and mass, are consistent among the objects being dropped.