Across
1
Path of a planet around the sun
3
Hottest planet in solar system
4
Fourth state of matter
6
Ball of burning gas in space
9
Nerve cell in the brain
10
Tissue that contracts for movement
Down
2
Preserved remains of ancient life
3
Infectious microscopic agent
4
Particle of light
5
Positive particle in nucleus
7
Measure of matter in an object
8
Substance with pH above 7
11
Chemical element in table salt