Across
1
Icy body with a tail near the sun
3
Our home planet
5
Amplified beam of light
7
Precious yellow metallic element
10
The Red Planet
11
Infectious microscopic agent
12
Substance with pH above 7
Down
1
Reddish electrical conductor
2
Unit of power
4
Chemical element in table salt
6
Glass that splits light into spectrum
8
Tissue that contracts for movement
9
Measure of matter in an object
13
Form of thermal energy