| A | B |
|---|
| air resistance | the type of friction caused by particles in the atmosphere |
| weightlessness | condition in which there is no pull of gravity |
| satellite | an object that revolves around another object |
| orbit | the path a satellite follows when it circles an object |
| weight | determined by the pull of gravity |
| free fall | causes weightlessness |
| sliding | the type of friction caused by pushing a crate across the floor |
| natural satellite | the Earth's moon is an example |
| artificial satellite | a weather satellite is an example |
| rolling | the type of friction caused by roller skates |
| Jupiter | where you would weight over twice your Earth weight |
| moon | where you would weight one-sixth of your Earth weight |
| deep space | where you would be almost weightless |
| space shuttle | where you would always be falling toward Earth |
