Across
1
Molten rock beneath Earth surface
4
Infectious microscopic agent
5
Amplified beam of light
6
Particle of light
9
Tissue that contracts for movement
11
Gas essential for breathing
Down
2
Chemical element in table salt
3
Gas form of a liquid
7
Push or pull on an object
8
Unit of power
9
Measure of matter in an object
10
Icy body with a tail near the sun
12
Unit of force