Across
1
Biological catalyst
5
Substance with pH below 7
6
Ball of burning gas in space
7
Icy body with a tail near the sun
9
Form of thermal energy
10
Unit of heredity
11
Unit of energy
Down
2
Disturbance that transfers energy
3
Unit of force
4
Compound containing oxygen
8
Amplified beam of light
10
Precious yellow metallic element