Across
1
Unit of force
4
Element found in all living things
6
Molten rock beneath Earth surface
10
Hottest planet in solar system
Down
1
Nerve cell in the brain
2
Compound containing oxygen
3
Biological catalyst
4
Reddish electrical conductor
5
Form of thermal energy
7
Substance with pH below 7
8
Gas essential for breathing
9
Precious yellow metallic element
11
Disturbance that transfers energy