Across
1
Ball of burning gas in space
4
Amplified beam of light
5
Hottest planet in solar system
8
Molten rock beneath Earth surface
Down
1
Chemical element in table salt
2
Path of a planet around the sun
3
Push or pull on an object
5
Unit of electric potential
6
Tissue that contracts for movement
7
Curved glass that refracts light
9
Gas form of a liquid