Across
1
Positive particle in nucleus
2
Tissue that contracts for movement
4
Solid with repeating atomic pattern
8
Molten rock beneath Earth surface
10
Push or pull on an object
11
Unit of heredity
12
Path of a planet around the sun
Down
2
Naturally occurring inorganic solid
3
Element found in all living things
5
Chemical element in table salt
6
Gas form of a liquid
7
Form of thermal energy
9
Hottest planet in solar system
13
Natural satellite of Earth