Across
1
Particle of light
4
Molten rock beneath Earth surface
5
Group of similar cells
8
Substance with pH below 7
9
Push or pull on an object
10
Solid with repeating atomic pattern
Down
1
Glass that splits light into spectrum
2
Unit of heredity
3
Icy body with a tail near the sun
6
Amplified beam of light
7
Blocking of light by a celestial body
11
Tissue that contracts for movement