Across
1
Amplified beam of light
2
Hottest planet in solar system
4
Particle of light
7
Force that attracts objects together
10
Curved glass that refracts light
Down
2
Infectious microscopic agent
3
Smallest unit of an element
5
Preserved remains of ancient life
6
Ball of burning gas in space
8
Substance with pH below 7
9
Push or pull on an object