Across
1
Natural satellite of Earth
4
Group of similar cells
5
Mass per unit volume
6
Hottest planet in solar system
9
Molten rock beneath Earth surface
10
Push or pull on an object
11
Path of a planet around the sun
Down
2
Absolute temperature scale unit
3
Precious yellow metallic element
7
Second lightest element
8
Element found in all living things
11
Compound containing oxygen
12
Unit of electric potential