Physics crossword

Across

3. A unit which is normally used to describe gravitational pull.
5. A red planet, 4th planet from sun.
6. An object blocks another from getting light.
9. It allows heat or electricity to go through it easily.
10. What is the thing what flows in electricity?
11. What answer has g/cm3 as a unit?
13. What makes you slow down when your speeding?

Down

1. A rock what has been developed from the big bang.
2. What measurement has cm3 as a unit?
4. What measures the power of electricity?
6. What makes light bulbs work?
7. What would you group gravity with?
8. It has 365 ¼ days.
11. It has 23 hours 56 minutes.
12. A rocky place with no gravity and thin atmosphere.