| Universal Law of Gravitation No. 1 | All objects with mass are attracted to one another by the gravitational force. |
| Universal Law of Gravitation No. 2 | The gravitational force between two masses is directly proportional to the mass of each object. |
| Universal Law of Gravitation No. 3 | The gravitational force between two masses is inversely proportional to the square of the distance between those two objects. |
| Centripetal force | The force necessary to make an object move in a circle. It is directed perpendicular to the velocity of the object, which means it points toward the centre of the circle. |
| Centripetal force No. 1 | Circular motion requires centripetal force. |
| Centripetal force No. 2 | The larger the centripetal force, the faster an object travels in a circle of a given size. |
| Centripetal force No. 3 | At a given speed, the larger the centripetal force, the smaller the circle. |
| The Four Forces | Gravitational Force, Electromagnetic Force, Weak Force, and Strong Force. |
| List the Eight Planets in order | Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. |
| List the Four Inner Planets in order | Mercury, Venus, Earth, and Mars. |
| List the Four Outer Planets in order | Jupiter, Saturn, Uranus, and Neptune. |
| Which of the Planets are/have Satellites? | Mars, Jupiter, Saturn, Uranus, and Neptune. |
| What Planet has the Galilean Satellites? | Jupiter |
| List the Four Planets with Rings and how many. | Jupiter, Saturn, Uranus 13, Neptune 9. |
| Between which two Planets do you find the Asteroid Belt? | Between Mars and Jupiter. |
| What is uncommon about Saturn, Uranus, and Neptune. | They are all outer planets, they all have similar compositions, they all have rings, and they all are quite cold! |
| Perturbations | Are small gravitational variations in the Planets motion. |
| Meteoroids | Are asteroids flung to earth. When they intersect earth's orbit they are called Meteoroids. |
| Meteors | When Meteoroids receive enormous amounts of friction, they become white hot, at this point they are called Meteors. |
| Meteorites | Are fragments of Meteors that fall to the earth. |
