Across
1
Compound containing oxygen
4
Amplified beam of light
5
Basic unit of life
7
Glass that splits light into spectrum
9
Unit of heredity
11
Substance with pH below 7
Down
2
Substance with pH above 7
3
Precious yellow metallic element
5
Reddish electrical conductor
6
Ball of burning gas in space
8
Tissue that contracts for movement
10
Chemical element in table salt