Unit 3 Review- Space

1. A spiral galaxy that contains billions of stars and over 500 solar systems.
5. A natural body that revolves around or orbits a planet.
8. If distance increases then the force of gravity _____________.
12. Phase of the moon when it is dark and it's the reflective side that is not visible from earth.
13. Phase of the moon when it is moving from full to new.
14. Small, irregular, rocky bodies in orbit around the Sun between Mars and Jupiter.
17. The earth’s shadow blocks the sunlight that is reflecting off the moon.
18. Orbit the Sun in long, narrow trails and come from cold, outer regions of the solar system.

2. Anything referring to the moon.
3. Phase of the moon when it is at its brightest and the entire illuminated side is visible from earth.
4. An object in space that revolves or orbits around a star.
6. If mass increases then the force of gravity ______________.
7. Phase of the moon when it is moving from new to full.
9. When an object to block the light from shining on another object or surface.
10. Mass of glowing gas; held together by its own gravity; gives off lots of energy.
11. An invisible force that pulls objects toward each other; due to mass and distance.
15. Anything referring to the sun.
16. The moon passes between the sun and the earth, blocking light from the sun getting to earth.