Across
1
Tectonic landmass section
4
Unit of electric potential
5
Our home planet
7
The Red Planet
9
Curved glass that refracts light
11
Unit of force
12
Smallest unit of an element
Down
1
Glass that splits light into spectrum
2
Push or pull on an object
3
Form of thermal energy
5
Biological catalyst
6
Positive particle in nucleus
8
Substance with pH below 7
10
Fourth state of matter