Across
1
Preserved remains of ancient life
3
Biological catalyst
5
Unit of force
8
Basic unit of life
9
Our home planet
13
Blocking of light by a celestial body
Down
2
Measure of matter in an object
4
Disturbance that transfers energy
6
Smallest unit of an element
7
Group of similar cells
10
Naturally occurring inorganic solid
11
Unit of electric potential
12
Ball of burning gas in space