Across
1
Tissue that contracts for movement
5
Tectonic landmass section
6
Path of a planet around the sun
7
Hottest planet in solar system
10
Reddish electrical conductor
11
The Red Planet
13
Form of thermal energy
Down
2
Preserved remains of ancient life
3
Glass that splits light into spectrum
4
Icy body with a tail near the sun
8
Naturally occurring inorganic solid
9
Unit of heredity
12
Gas form of a liquid