Across
1
Glass that splits light into spectrum
3
Unit of electric potential
5
Blocking of light by a celestial body
6
Gas essential for breathing
7
Path of a planet around the sun
9
Element found in all living things
Down
1
Positive particle in nucleus
2
Ball of burning gas in space
4
Naturally occurring inorganic solid
8
Particle of light
10
Natural satellite of Earth
11
Push or pull on an object