Across
1
Basic unit of life
4
Glass that splits light into spectrum
6
Gas form of a liquid
7
Center of an atom or cell
11
Gas essential for breathing
12
Measure of matter in an object
Down
2
Push or pull on an object
3
Second lightest element
5
Magnetic metallic element
8
Disturbance that transfers energy
9
Biological catalyst
10
Element found in all living things
12
Tissue that contracts for movement