Across
1
Biological catalyst
3
Infectious microscopic agent
5
Gas essential for breathing
6
Absolute temperature scale unit
8
Unit of power
9
Unit of energy
10
Icy body with a tail near the sun
Down
1
Our home planet
2
Naturally occurring inorganic solid
3
Hottest planet in solar system
4
Positive particle in nucleus
7
Natural satellite of Earth