Across
1
Natural satellite of Earth
4
Mass per unit volume
6
Infectious microscopic agent
9
Basic unit of life
10
Chemical element in table salt
12
Substance with pH above 7
Down
1
The Red Planet
2
Path of a planet around the sun
3
Magnetic metallic element
5
Precious yellow metallic element
7
Glass that splits light into spectrum
8
Particle of light
11
Element found in all living things