Across
1
The Red Planet
2
Biological catalyst
4
Natural satellite of Earth
5
Amplified beam of light
6
Nerve cell in the brain
9
Curved glass that refracts light
10
Measure of matter in an object
Down
1
Molten rock beneath Earth surface
3
Unit of heredity
4
Naturally occurring inorganic solid
7
Unit of electric potential
8
Chemical element in table salt