Across
1
Glass that splits light into spectrum
2
Measure of matter in an object
3
Curved glass that refracts light
4
Disturbance that transfers energy
7
Push or pull on an object
9
Chemical element in table salt
10
Basic unit of life
Down
2
Tissue that contracts for movement
5
Unit of electric potential
6
Hottest planet in solar system
8
Nerve cell in the brain
11
The Red Planet