| A | B |
|---|
| air resistance | a type of friction, the opposition to movement caused by air particles. |
| weightlessness | a condition in which there is no pull of gravity or the pull of gravity is so small that the effects are not noticeble. |
| sattelite | an object that revolves around another object. |
| orbit | the path a sattelite follows as it circles the earth. |
| sliding friction | when 2 solid objects slide accross one another. |
| rolling friction | occurs when a round object rolls over a surface. |
| earth's gravity | determine's weight of an object |
| object's weight | the amount of force that gravity exerts on an objects mass |
| gravity | keeps objects near the earth's surface |
