Across
1
Smallest unit of an element
3
Substance with pH above 7
5
Absolute temperature scale unit
6
Amplified beam of light
7
Infectious microscopic agent
8
Precious yellow metallic element
10
The Red Planet
Down
2
Path of a planet around the sun
4
Naturally occurring inorganic solid
7
Hottest planet in solar system
9
Fourth state of matter
11
Preserved remains of ancient life
12
Curved glass that refracts light
13
Unit of energy