Ten Facts about Gravity from www.theschoolrun.com :
- The bigger the object’s mass, the more gravity it will have; the smaller the mass of the object, the less gravity it is subject to.
- Gravity guides the growth of plants and other vegetation.
- Black holes have the strongest gravitational pull in the entire universe.
- The Earth is a giant magnet. Its magnetic field is like a bar magnet at its centre.
- Sir Isaac Newton discovered gravity about 300 years ago. The story is that Newton saw an apple fall out of a tree. When this happened he realised there was a force that made it occur, and he called it gravity.
- Ocean tides are caused by the gravity of the moon.
- If you could travel from planet to planet your mass would stay the same, but your weight would vary depending on how the gravity of that planet pulled on you. Mars is smaller and has less mass than Earth and as a result it has less gravity. If you weigh 100 pounds on Earth, you would weigh 38 pounds on Mars.
- At some point when falling, the friction from the air will equal the force of gravity and the object will be at a constant speed. This is called the terminal velocity. For a sky diver this speed is around 100 miles per hour!
- We don’t actually “feel” gravity. We only feel the effects of trying to overcome it by jumping or when we fall.
- Gravity always pulls, it never pushes.
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