Across
1
Naturally occurring inorganic solid
2
Molten rock beneath Earth surface
4
Group of similar cells
5
Substance with pH below 7
7
Blocking of light by a celestial body
8
Preserved remains of ancient life
Down
1
Measure of matter in an object
2
Tissue that contracts for movement
3
Basic unit of life
6
Tectonic landmass section
9
Gas essential for breathing
10
Push or pull on an object
11
Chemical element in table salt
12
Amplified beam of light