Gravity is a force between any two masses.
Yes.
water ...
i think it's a matter of gravity.
Sorry, but earth is not a gravity free system. No matter where it is placed in the universe it will still have gravity that will affect all around it and that upon it.
No. Mass (e.g. grams) is a measure of matter, and is independent of gravity. Weight (e.g. pounds) is a measure of force and is directly related to gravity.
no matter what it always hit the ground at the same time
Any two objects attract one another.
Gravity is NOT matter, it is a force that effects matter.
The most important effect of gravity in hockey is that it keeps the ball on or close to the ground. For that matter it also keeps the players on the ground.
No. Gravity is a consequence of matter but it does not have mass itself.
Matter causes gravity in the first place.
The Moon has only about 17% of earths gravity. that means the average man will weigh about 12 kilo, if you drop a stone it will fall to the ground but slowly.