Across
1
Form of thermal energy
2
Natural satellite of Earth
3
Curved glass that refracts light
7
Basic unit of life
8
Disturbance that transfers energy
9
Push or pull on an object
10
Unit of energy
Down
2
Tissue that contracts for movement
4
Compound containing oxygen
5
Gas essential for breathing
6
Group of similar cells
11
Smallest unit of an element