Across
1
Our home planet
4
Smallest unit of an element
6
Tissue that contracts for movement
7
The Red Planet
8
Gas essential for breathing
Down
2
Hottest planet in solar system
3
Naturally occurring inorganic solid
5
Mass per unit volume
Our home planet
Smallest unit of an element
Tissue that contracts for movement
The Red Planet
Gas essential for breathing
Hottest planet in solar system
Naturally occurring inorganic solid
Mass per unit volume