Across
1
Tissue that contracts for movement
2
Preserved remains of ancient life
5
Biological catalyst
8
Ball of burning gas in space
9
Reddish electrical conductor
11
Magnetic metallic element
12
The Red Planet
Down
2
Push or pull on an object
3
Curved glass that refracts light
4
Hottest planet in solar system
6
Absolute temperature scale unit
7
Particle of light
10
Molten rock beneath Earth surface
13
Chemical element in table salt