| A | B |
|---|
| orbit | A condition were there is no gravity. |
| air resistance | When the air slows you down if you are riding a bike for instance, if you lean forward you can go faster. |
| wieghtlessness | when you move from planet to planet your real weight stays the same. |
| gravity | when you throw a ball up in the air gravity pulls it down. |
| rolling | rolling lets something move faster because it has a round surface. |
| less | something that has not as much as another. |
| mass | The weight of something. |
| satellite | something that orbits a planet and takes pictures. |
| sliding friction | sliding friction is harder than rolling friction because the sliding makes alot of friction which makes it harder to move. |
| more | something that has a greater amount than another. |
