Across
1
Glass that splits light into spectrum
3
Gas essential for breathing
7
Absolute temperature scale unit
8
Smallest unit of an element
10
Molten rock beneath Earth surface
11
Unit of energy
13
Disturbance that transfers energy
Down
2
Force that attracts objects together
4
Group of similar cells
5
Chemical element in table salt
6
Our home planet
9
Tectonic landmass section
12
Gas form of a liquid