Across
1
Unit of energy
3
Infectious microscopic agent
4
Group of similar cells
7
Amplified beam of light
8
Chemical element in table salt
Down
2
Icy body with a tail near the sun
3
Hottest planet in solar system
5
Substance with pH above 7
6
Force that attracts objects together
9
Naturally occurring inorganic solid
10
Curved glass that refracts light