Across
1
Natural satellite of Earth
2
Particle of light
4
Biological catalyst
5
Basic unit of life
8
Hottest planet in solar system
9
Solid with repeating atomic pattern
Down
2
Fourth state of matter
3
Reddish electrical conductor
6
Nerve cell in the brain
7
Naturally occurring inorganic solid
10
Second lightest element
11
Push or pull on an object