Across
1
Substance with pH above 7
3
Chemical element in table salt
4
Positive particle in nucleus
5
Measure of matter in an object
7
Magnetic metallic element
8
Biological catalyst
9
Hottest planet in solar system
10
Substance with pH below 7
11
Molten rock beneath Earth surface
12
Unit of heredity
13
Disturbance that transfers energy
Down
2
Naturally occurring inorganic solid
4
Tectonic landmass section
5
The Red Planet
6
Blocking of light by a celestial body