Across
1
Element found in all living things
3
Glass that splits light into spectrum
6
Compound containing oxygen
7
Our home planet
8
Ball of burning gas in space
9
Biological catalyst
11
Preserved remains of ancient life
Down
2
Measure of matter in an object
4
Hottest planet in solar system
5
Force that attracts objects together
10
Curved glass that refracts light
12
Molten rock beneath Earth surface