Across
1
Gas essential for breathing
4
Gas form of a liquid
6
Path of a planet around the sun
7
Push or pull on an object
8
Hottest planet in solar system
11
Molten rock beneath Earth surface
Down
2
Chemical element in table salt
3
Particle of light
5
Disturbance that transfers energy
9
Unit of electric potential
10
Our home planet
11
Measure of matter in an object