Across
1
Compound containing oxygen
5
Solid with repeating atomic pattern
6
Push or pull on an object
11
Second lightest element
Down
2
Preserved remains of ancient life
3
Glass that splits light into spectrum
4
Unit of energy
7
Path of a planet around the sun
8
Group of similar cells
9
Smallest unit of an element
10
Tectonic landmass section
12
Our home planet