Across
1
Our home planet
4
Form of thermal energy
5
Unit of force
6
Solid with repeating atomic pattern
10
Smallest unit of an element
Down
2
Second lightest element
3
Particle of light
7
Compound containing oxygen
8
Blocking of light by a celestial body
9
Path of a planet around the sun
11
Glass that splits light into spectrum
12
Infectious microscopic agent