| Definition | Term |
| The force that attracts all objects toward each other | |
| The different shapes of the moon you see from Earth | |
| If the Northern Hemisphere is tilted towards the sun, what season is it experiencing? | |
| Type of eclipse that occurs at a full moon when Earth is directly between the moon and the sun | |
| The imaginary line that passes through Earth's center and the North and South poles | |
| The shape of Earth's orbit | |
| The rise and fall of ocean water that occurs every 12.5 hours or so | |
| Type of eclipse that occurs when the moon passes directly between Earth and the sun, blocking sunlight from Earth | |
| The spinning of Earth on its axis | |
| Are winter and summer equinoxes or solstices? | |
| Which is larger in size, the moon or Earth? | |
| The light-colored features of the moon | |
| If the distance between two objects increases, with the gravitational force between them increase or decrease? | |
| What two factors combine to keep Earth in orbit around the sun and the moon in orbit around Earth? | |
| Type of tide with the greatest difference between consecutive low and high tides | |
| Type of tide with the least difference between consecutive low and high tides | |
| Type of tide that occurs during a first-quarter moon and third-quarter moon, when the moon, sun, and Earth are at a right angle | |
| If the mass of an object increases, will it exert a stronger or weaker gravitational force? | |
| The larger part of the moon's shadow | |
| A measure of the force of gravity on an object | |
| Which has a higher mass, the moon or Earth? | |
| The dark, flat areas on the moon | |
| The two days of the year when the Earth is tilted the most towards or away from the sun | |