Across
1
Gas form of a liquid
2
Unit of power
4
Icy body with a tail near the sun
5
Mass per unit volume
7
Path of a planet around the sun
8
Tectonic landmass section
9
Basic unit of life
Down
2
Disturbance that transfers energy
3
Glass that splits light into spectrum
4
Solid with repeating atomic pattern
6
Smallest unit of an element
8
Positive particle in nucleus