Across
1
Second lightest element
5
Tectonic landmass section
6
The Red Planet
7
Element found in all living things
9
Ball of burning gas in space
Down
2
Magnetic metallic element
3
Measure of matter in an object
4
Solid with repeating atomic pattern
8
Unit of power
10
Molten rock beneath Earth surface
11
Path of a planet around the sun
12
Infectious microscopic agent