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)
Responses
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 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 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.
Gravity will not affect how long it takes for the objects to fall to the ground.
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, it is important to control all the variables except the one being tested, which is the effect of gravity on different objects. By using objects with different sizes, shapes, and masses, there are other factors at play that could affect the drop times. To improve the experiment's design, the student should use objects that are identical in size, shape, and mass.