Across
1
Hottest planet in solar system
3
Positive particle in nucleus
6
Unit of energy
7
Measure of matter in an object
8
Preserved remains of ancient life
10
Icy body with a tail near the sun
11
Path of a planet around the sun
Down
1
Unit of electric potential
2
Tectonic landmass section
3
Fourth state of matter
4
Chemical element in table salt
5
Biological catalyst
9
Compound containing oxygen