In 1–2 sentences, outline how you could test the effect of gravity on objects with different masses. like a 9th grader

Answer 1

To test the effect of gravity on objects with different masses, you can drop two or more objects, like a feather and a rock, from the same height and observe how long it takes each to reach the ground. You should find that, without air resistance, they fall at the same rate, showing that gravity acts equally on all masses.