Across
1
Form of thermal energy
4
Disturbance that transfers energy
5
Tectonic landmass section
7
Force that attracts objects together
9
Natural satellite of Earth
10
Absolute temperature scale unit
11
Group of similar cells
12
Gas form of a liquid
Down
2
Molten rock beneath Earth surface
3
Our home planet
5
Glass that splits light into spectrum
6
Solid with repeating atomic pattern
8
Second lightest element
13
Particle of light
14
Gas essential for breathing