Across
1
Gas form of a liquid
4
Blocking of light by a celestial body
6
Magnetic metallic element
7
Natural satellite of Earth
8
Chemical element in table salt
Down
2
Smallest unit of an element
3
Push or pull on an object
5
Particle of light
9
Preserved remains of ancient life
10
Absolute temperature scale unit
11
Icy body with a tail near the sun
12
Infectious microscopic agent