Across
1
Disturbance that transfers energy
2
Amplified beam of light
3
Infectious microscopic agent
5
Path of a planet around the sun
6
Tectonic landmass section
Down
2
Curved glass that refracts light
4
Fourth state of matter
5
Compound containing oxygen
7
Magnetic metallic element
8
Chemical element in table salt
9
Ball of burning gas in space
10
Positive particle in nucleus
11
Gas essential for breathing