Across
1
Biological catalyst
4
Chemical element in table salt
6
Element found in all living things
9
Compound containing oxygen
11
Disturbance that transfers energy
Down
2
Gas essential for breathing
3
Push or pull on an object
5
Glass that splits light into spectrum
7
Infectious microscopic agent
8
Naturally occurring inorganic solid
10
Blocking of light by a celestial body