Cyclical Events

2. In this moon phase, all of the moon is illuminated by the sun.
4. The constellations that we can see in the Northern Hemisphere change depending on the _____.
11. Although the sun is not orbiting the Earth, it looks like it is because of apparent _____.
12. The Earth is tilted 23.4 degrees on its ____.
13. A group of stars that forms a recognizable pattern.
15. The act of orbiting around an object, such as the sun.
16. The force that keeps objects in space moving in orbits.

1. The point in Earth's orbit in which a hemisphere is tilted most towards or away from the sun.
3. The act of spinning, like a basketball might do on your finger.
5. This planet has the greatest tilt on its axis.
6. At times Earth experiences this when the moon is blocking our view of the sun.
7. This cycle, which you may enjoy when visiting the beach, is created by the gravity of the moon.
8. This means that the part of the moon that can be viewed from Earth is growing larger.
9. The number of hours it takes Earth to rotate, giving us day and night.
10. In combination with the Earth's revolution around the sun, this causes us to have seasons.
11. This is about the length of time it takes for the moon to go through all of its phases.
14. The length of time it takes a planet to complete its orbit depends on its distance from the _____.