Across
1
Tissue that contracts for movement
5
Natural satellite of Earth
6
Group of similar cells
8
The Red Planet
11
Fourth state of matter
12
Positive particle in nucleus
Down
2
Icy body with a tail near the sun
3
Chemical element in table salt
4
Second lightest element
7
Hottest planet in solar system
9
Magnetic metallic element
10
Preserved remains of ancient life
11
Glass that splits light into spectrum