Across
1
Glass that splits light into spectrum
5
Mass per unit volume
6
Gas essential for breathing
7
Substance with pH above 7
8
Unit of energy
9
Disturbance that transfers energy
10
Center of an atom or cell
Down
2
Smallest unit of an element
3
Infectious microscopic agent
4
Chemical element in table salt
11
Naturally occurring inorganic solid
12
Tectonic landmass section
13
Blocking of light by a celestial body