Across
1
Path of a planet around the sun
3
Hottest planet in solar system
5
Unit of power
7
Element found in all living things
10
Magnetic metallic element
12
Preserved remains of ancient life
13
Solid with repeating atomic pattern
Down
2
Natural satellite of Earth
4
Unit of force
6
Form of thermal energy
8
Fourth state of matter
9
Ball of burning gas in space
11
Absolute temperature scale unit