Across
1
Glass that splits light into spectrum
4
Blocking of light by a celestial body
5
Fourth state of matter
7
Our home planet
10
Particle of light
11
Gas essential for breathing
12
Magnetic metallic element
Down
2
Path of a planet around the sun
3
Naturally occurring inorganic solid
5
Positive particle in nucleus
6
Tissue that contracts for movement
8
Infectious microscopic agent
9
Tectonic landmass section