Across
1
Basic unit of life
2
Ball of burning gas in space
3
Magnetic metallic element
4
Tissue that contracts for movement
6
Blocking of light by a celestial body
8
Unit of force
9
Fourth state of matter
Down
1
Element found in all living things
4
Naturally occurring inorganic solid
5
The Red Planet
7
Curved glass that refracts light
10
Group of similar cells