Across
1
Mass per unit volume
3
The Red Planet
4
Gas form of a liquid
5
Reddish electrical conductor
7
Preserved remains of ancient life
8
Path of a planet around the sun
9
Blocking of light by a celestial body
Down
2
Push or pull on an object
3
Tissue that contracts for movement
4
Unit of electric potential
5
Element found in all living things
6
Hottest planet in solar system
10
Disturbance that transfers energy