Question

Rebecca is conducting an experiment to see if the height of a ramp affects the speed at which a marble rolls down the ramp. What should be the only variable in Rebecca's experiment?
a the type of marble
b the height of the ramp
c the material the ramp is made of
d the point from which the marble is released

Answer 1

@YoungElk

Answer 2

b the height of the ramp
You want the height of the ramp to be the only thing being changed in this experiment because you want to find the effect that changing it has on the marble being rolled down.

Answer 3

it was right thanks

Answer 4

no problem

Answer 5

your awesome