Across
1
Absolute temperature scale unit
2
Push or pull on an object
3
Ball of burning gas in space
6
Gas essential for breathing
9
Path of a planet around the sun
11
Smallest unit of an element
Down
2
Preserved remains of ancient life
4
Unit of force
5
Amplified beam of light
7
Biological catalyst
8
Unit of energy
10
Hottest planet in solar system