Across
1
Curved glass that refracts light
4
The Red Planet
6
Icy body with a tail near the sun
8
Unit of force
12
Force that attracts objects together
Down
2
Tectonic landmass section
3
Fourth state of matter
5
Ball of burning gas in space
7
Push or pull on an object
9
Our home planet
10
Molten rock beneath Earth surface
11
Natural satellite of Earth