Across
1
Biological catalyst
5
Infectious microscopic agent
7
Compound containing oxygen
8
Basic unit of life
9
Absolute temperature scale unit
10
Precious yellow metallic element
11
Unit of electric potential
12
Glass that splits light into spectrum
13
The Red Planet
Down
2
Force that attracts objects together
3
Molten rock beneath Earth surface
4
Form of thermal energy
6
Blocking of light by a celestial body