Across
1
Absolute temperature scale unit
5
Preserved remains of ancient life
7
Molten rock beneath Earth surface
8
Nerve cell in the brain
Down
2
Positive particle in nucleus
3
Unit of force
4
Unit of electric potential
6
Precious yellow metallic element
9
Gas form of a liquid
10
Force that attracts objects together
11
Blocking of light by a celestial body
12
Glass that splits light into spectrum