Across
1
Push or pull on an object
4
Solid with repeating atomic pattern
6
Gas essential for breathing
8
Molten rock beneath Earth surface
10
Curved glass that refracts light
11
Natural satellite of Earth
Down
2
Basic unit of life
3
Unit of force
5
Biological catalyst
7
Unit of energy
9
Compound containing oxygen
12
Naturally occurring inorganic solid
13
Element found in all living things