| A | B |
|---|
| Gravity | is a force of attraction, or pull between any two objects. It is affected by the total mass of the two objects and the distances between. |
| Orbit | is the path one object takes around another object. |
| Inertia | is the tendency of a moving object to keep moving in a straight line. |
| Revolution | is one complete trip around the Sun. Earth makes this trip in one year, or in 365 1/4 days. |
| Rotation | this is a complete spin that an object makes on it's axis. |
| Phase | means to introduce gradually like when the shape of the moon changes in relation to it's location to the Earth and Sun. |
| Solar Eclipse | is when the Moon casts a shadow on the Earth. It can only occur during a new moon phase. |
| Lunar Eclipse | When the Earth is between the Sun and the Moon and it only happens during a full moon phase. |
| Tide | the rise or fall of the oceans' surface caused by the pull of gravity. |
| Solar System | made up of a star and the objects that orbit around it. |
| Planet | is a large object that orbits around a star. |
| Moon | is a natural object that orbits around a planet. |
| Asteroid | is a rock that revolves around the Sun. |
| Satelite | an object in space that circles around another object. |
| Gravity and inertia keep Earth moving around the Sun in its | orbit |
| When the Moon moves into Earth's shadow | lunar eclipse |
| A large object that orbits a star is called a | planet |
| The appearance of the shape of the moon at a particular time is called a | phase |
| Every 24 hours, Earth makes a complete one of these on it's axis | revolution |
| One of these occur when the Earth moves into the Moon's shadow | solar eclipse |
| The tendency of a moving object to keep moving in a straight line is called | inertia |
| The rise and fall of the ocean's surface is called the | tides |
| Earth makes one of these in 365 days | revolution |
| A natural object that orbits a planet is called a | moon |
| A manmade object that orbits a planet is called a | satelite |
