A) Kilograms per cubic meter. Every other option either contains pounds or feet, which are both units of measurement from the standard system, not the metric system.
The statement: Mass affects how fast an object falls is true.
Answer:
The ones that are after the light that went out are also out.
Explanation:
The answer is D. i got all the other ones wrong ._.
B- lack of control.
the scientists did not have a proper control group.
