Across
1
Absolute temperature scale unit
3
Icy body with a tail near the sun
5
The Red Planet
7
Basic unit of life
9
Center of an atom or cell
11
Substance with pH below 7
12
Measure of matter in an object
Down
2
Compound containing oxygen
4
Glass that splits light into spectrum
6
Solid with repeating atomic pattern
8
Chemical element in table salt
10
Unit of power