Across
1
Ball of burning gas in space
4
Element found in all living things
5
Glass that splits light into spectrum
10
Group of similar cells
11
Unit of power
Down
2
Particle of light
3
Reddish electrical conductor
4
Solid with repeating atomic pattern
6
Infectious microscopic agent
7
Chemical element in table salt
8
Natural satellite of Earth
9
Path of a planet around the sun