| A | B |
|---|
| What is a force? | A push or pull |
| Forces that are equal in size but opposite direction are called: | Balanced forces |
| Forces that cause a change in the motion of an object are: | Unbalanced forces |
| What does an unbalanced force do to an object at rest? | Makes it move |
| What does an unbalanced force do to an object that is in motion? | Could stop it, slow it or change its direction |
| When we measure weight, we are measuring the pull of: | gravity |
| Would a planet with a large mass have a strong or weak force of gravity? | strong |
| Would a planet with a small mass have a strong or weak force of gravity? | weak |
| Would planets have a stronger gravitational attraction if they are close or far? | closer |
| Would planets have a weaker gravitational attraction if they are close or far? | far |
| A circular or elliptical path around a larger object is called: | an orbit |
| For an object to be in orbit, it needs to have the right combination of ____ and ____. | height and speed |
