Across
1
Tectonic landmass section
4
Push or pull on an object
6
Magnetic metallic element
7
Particle of light
8
Smallest unit of an element
9
Molten rock beneath Earth surface
Down
2
Icy body with a tail near the sun
3
Second lightest element
5
Our home planet
7
Glass that splits light into spectrum
10
Blocking of light by a celestial body
11
Group of similar cells
12
Unit of power
13
Element found in all living things