Across
1
Blocking of light by a celestial body
4
Ball of burning gas in space
5
Biological catalyst
10
Fourth state of matter
11
Element found in all living things
Down
2
Amplified beam of light
3
Unit of force
5
Our home planet
6
Magnetic metallic element
7
Curved glass that refracts light
8
Measure of matter in an object
9
Tissue that contracts for movement