Across
1
Unit of energy
4
Chemical element in table salt
6
Particle of light
7
Tectonic landmass section
8
Naturally occurring inorganic solid
9
The Red Planet
Down
2
Smallest unit of an element
3
Preserved remains of ancient life
5
Blocking of light by a celestial body
10
Measure of matter in an object
11
Icy body with a tail near the sun