Across
1
Fourth state of matter
4
Unit of force
7
Basic unit of life
9
Tissue that contracts for movement
11
Ball of burning gas in space
13
Second lightest element
14
Absolute temperature scale unit
Down
2
Amplified beam of light
3
Element found in all living things
5
Unit of electric potential
6
Blocking of light by a celestial body
8
Our home planet
10
Compound containing oxygen
12
Gas essential for breathing