| A | B |
| orbit | What is the name of the path an obejct takes in space as it moves around a larger object? |
| sun | The Earth orbits this object. |
| counter-clockwise | This is the direction in which the planets orbit the sun. |
| gravity | The strong pull of this keeps planets orbiting in predictable paths around the sun. |
| elliptical | Some planets travel in an orbit shaped in this way. |
| primary | The larger object being orbited is called this. |
| secondary | The smaller object in an orbit is this. |
| moon | What is the name of the Earth's secondary orbiting object? |