Unit 2 Vocabulary

3. the sun, its planets, and all other objects in orbit around the sun or planets.
6. one orbit of an object in space around another object in space.
7. relating to or determined by the sun.
9. each of the appearances of the moon or a planet according to the amount of its illumination.
10. stored energy an object has because of its position or shape.
12. determined by or resembling the moon.
13. spinning of a planet, moon, sun, or other object around its axis.
15. path an object in space follows as it revolves around another object.
16. regular changes in the moon's appearance, as seen from Earth.
18. force of attraction between any two objects.
19. occurs when the moon passes through the Earth's shadow.
20. when one solar object passes between the Sun and another object, casting a shadow.

1. a series of events that are regularly repeated in the same order.
2. an oval, the shape of the orbits of the planets.
4. occurs when the moon passes between the Earth and the Sun, blocking the Sun's light from Earth.
5. how things are arranged in space.
8. the energy possessed by an object due to its position relative to other objects.
11. to apply
14. a force that tends to move objects towards each other.
17. a group of related objects that function together as a whole.