Materials

We need the following:

• Ruler
  

• Quarter
  

• Feather
  

• Timer

What is Gravitation?

Gravitation is a general term describing the attractive influence that all objects with mass exert on each other. It is responsible for keeping the Earth and the other planets in their orbits around the Sun; for keeping the Moon in its orbit around the Earth, for the formation of tides; and also if there has no gravitation, every thing will be floating around.

My Hypothesis

Our hypothesis is quarters and feathers can not fall at the same speed, because quarters has more mass than the feathers, and the quarters will has more gravity, so the quarters will fall faster than the feathers.