Across
1
Tissue that contracts for movement
4
Fourth state of matter
6
Our home planet
7
Center of an atom or cell
9
Path of a planet around the sun
Down
2
Infectious microscopic agent
3
Disturbance that transfers energy
5
Second lightest element
8
Icy body with a tail near the sun
10
Glass that splits light into spectrum
11
Unit of electric potential
12
Unit of energy