Across
1
Amplified beam of light
2
Molten rock beneath Earth surface
4
Icy body with a tail near the sun
6
Unit of force
7
Biological catalyst
8
Particle of light
Down
2
Tissue that contracts for movement
3
Group of similar cells
4
Solid with repeating atomic pattern
5
Smallest unit of an element
6
Nerve cell in the brain