Which expression should appear in the blue box to compute percent error? accepted value – experimental value accepted value × experimental value experimental value + accepted value experimental value – accepted value

The last choice ... Experimental value -- Accepted value ... is the place
to start, but it doesn't quite get you there.

To find the FRACTIONAL error, you'd have to divide that difference
by the Accepted Value.

And then . . .

To find the PERCENTAGE error, you'd have to multiply
the fractional error by 100 .

D. Experimental value – Accepted value

Rain is pulled by gravity which is a non contact force

Gas will most likely  fill the container