Across
1
Group of similar cells
3
Magnetic metallic element
5
Molten rock beneath Earth surface
6
Form of thermal energy
8
Curved glass that refracts light
10
Amplified beam of light
Down
2
Particle of light
4
Center of an atom or cell
5
Naturally occurring inorganic solid
7
Reddish electrical conductor
9
Push or pull on an object
11
Unit of heredity