Across
1
Particle of light
4
Blocking of light by a celestial body
5
Basic unit of life
8
Disturbance that transfers energy
9
Gas form of a liquid
Down
1
Tectonic landmass section
2
Ball of burning gas in space
3
Unit of heredity
6
Measure of matter in an object
7
Preserved remains of ancient life
10
Gas essential for breathing
11
Absolute temperature scale unit