Across
1
Unit of energy
4
Naturally occurring inorganic solid
6
Natural satellite of Earth
7
Icy body with a tail near the sun
Down
2
Particle of light
3
Fourth state of matter
5
Biological catalyst
8
The Red Planet
9
Unit of electric potential
Unit of energy
Naturally occurring inorganic solid
Natural satellite of Earth
Icy body with a tail near the sun
Particle of light
Fourth state of matter
Biological catalyst
The Red Planet
Unit of electric potential