Across
1
Compound containing oxygen
4
Hottest planet in solar system
5
Amplified beam of light
9
Natural satellite of Earth
10
Positive particle in nucleus
12
Force that attracts objects together
Down
2
Nerve cell in the brain
3
Our home planet
6
Disturbance that transfers energy
7
Magnetic metallic element
8
Substance with pH above 7
10
Glass that splits light into spectrum
11
Tissue that contracts for movement