Across
1
The Red Planet
3
Biological catalyst
5
Absolute temperature scale unit
6
Tectonic landmass section
7
Substance with pH above 7
8
Glass that splits light into spectrum
10
Icy body with a tail near the sun
Down
1
Measure of matter in an object
2
Hottest planet in solar system
4
Second lightest element
9
Group of similar cells