Across
1
Compound containing oxygen
3
Disturbance that transfers energy
6
Unit of heredity
7
Amplified beam of light
9
Gas form of a liquid
10
Center of an atom or cell
12
Icy body with a tail near the sun
13
Form of thermal energy
Down
2
Tectonic landmass section
4
Naturally occurring inorganic solid
5
Absolute temperature scale unit
8
Unit of force
11
Force that attracts objects together