| A | B |
|---|
| Gravity | a pull or force of attraction between two objects. |
| Orbit | The elliptical (oval) path of the planets as they travel around the sun |
| Inertia | the tendency of all objects to keep moving in a straight line. |
| ellipse | a round shape and may have a longer width than height |
| Planets in the solar system | Mercury, Venus, Earth,Mars, Jupiter, Saturn, Uranus,Neptune, and Pluto. |
| What is a year? | The amount of time required for a planet to completely orbit around the Sun. |
| What is a Day? | The amount of time required for a complete day/night cycle. |
| Rotate | refers to one complete turn on a planet’s axis |
| Revolve or Translation | refers to one complete orbital path around the Sun |
| seasons | Summer, winter, autumn, and |
| Tilt | the inclination of the earth’s axis. |
