Across
1
Biological catalyst
3
Gas form of a liquid
5
Chemical element in table salt
6
Precious yellow metallic element
7
Push or pull on an object
12
Magnetic metallic element
13
Basic unit of life
Down
2
Naturally occurring inorganic solid
3
Infectious microscopic agent
4
Unit of force
8
Path of a planet around the sun
9
Positive particle in nucleus
10
Icy body with a tail near the sun
11
Compound containing oxygen