Across
1
Blocking of light by a celestial body
4
Measure of matter in an object
5
Tissue that contracts for movement
8
Infectious microscopic agent
9
Unit of heredity
10
Preserved remains of ancient life
11
Particle of light
Down
2
Gas form of a liquid
3
Second lightest element
5
Naturally occurring inorganic solid
6
Smallest unit of an element
7
Substance with pH above 7
12
Magnetic metallic element