Across
1
Blocking of light by a celestial body
5
Preserved remains of ancient life
6
Our home planet
7
Infectious microscopic agent
8
Natural satellite of Earth
11
Precious yellow metallic element
12
Path of a planet around the sun
Down
2
Unit of energy
3
Group of similar cells
4
Push or pull on an object
8
Measure of matter in an object
9
Nerve cell in the brain
10
Particle of light