Across
1
Tissue that contracts for movement
5
Molten rock beneath Earth surface
6
Hottest planet in solar system
7
Positive particle in nucleus
8
Push or pull on an object
Down
2
Nerve cell in the brain
3
Substance with pH below 7
4
Second lightest element
6
Gas form of a liquid
9
Disturbance that transfers energy
10
Smallest unit of an element
11
Infectious microscopic agent