Across
1
Curved glass that refracts light
3
Unit of power
6
Tectonic landmass section
7
Naturally occurring inorganic solid
9
Fourth state of matter
11
Glass that splits light into spectrum
Down
2
Group of similar cells
4
Path of a planet around the sun
5
Center of an atom or cell
8
Our home planet
10
Unit of heredity
12
Measure of matter in an object