Across
1
Compound containing oxygen
5
Gas essential for breathing
6
Naturally occurring inorganic solid
7
Group of similar cells
11
Gas form of a liquid
13
Blocking of light by a celestial body
Down
2
Unit of electric potential
3
Precious yellow metallic element
4
Our home planet
6
The Red Planet
8
Amplified beam of light
9
Solid with repeating atomic pattern
10
Absolute temperature scale unit
12
Disturbance that transfers energy