Across
1
Tectonic landmass section
3
Precious yellow metallic element
4
Smallest unit of an element
5
Gas form of a liquid
8
Measure of matter in an object
9
Form of thermal energy
10
Natural satellite of Earth
Down
2
Second lightest element
3
Force that attracts objects together
6
Absolute temperature scale unit
7
Amplified beam of light
11
Gas essential for breathing