Across
1
Molten rock beneath Earth surface
3
Curved glass that refracts light
4
Element found in all living things
6
Natural satellite of Earth
8
Ball of burning gas in space
Down
1
The Red Planet
2
Gas essential for breathing
3
Amplified beam of light
4
Solid with repeating atomic pattern
5
Compound containing oxygen
7
Positive particle in nucleus
9
Fourth state of matter