Across
1
Preserved remains of ancient life
4
Disturbance that transfers energy
6
Blocking of light by a celestial body
8
Push or pull on an object
Down
2
Compound containing oxygen
3
Tectonic landmass section
5
Chemical element in table salt
7
Nerve cell in the brain
9
Naturally occurring inorganic solid
10
Force that attracts objects together
11
Biological catalyst
12
The Red Planet