Across
1
Second lightest element
3
Path of a planet around the sun
7
Fourth state of matter
Down
2
Solid with repeating atomic pattern
4
Our home planet
5
Hottest planet in solar system
6
Unit of power
7
Tectonic landmass section
Second lightest element
Path of a planet around the sun
Fourth state of matter
Solid with repeating atomic pattern
Our home planet
Hottest planet in solar system
Unit of power
Tectonic landmass section