Across
1
Unit of force
3
Glass that splits light into spectrum
4
Compound containing oxygen
6
Group of similar cells
10
Positive particle in nucleus
Down
2
Our home planet
4
Gas essential for breathing
5
Unit of power
7
Blocking of light by a celestial body
8
Fourth state of matter
9
The Red Planet
11
Unit of electric potential
12
Precious yellow metallic element