Across
1
Compound containing oxygen
2
Precious yellow metallic element
4
Natural satellite of Earth
5
Smallest unit of an element
6
Measure of matter in an object
8
Amplified beam of light
9
Form of thermal energy
10
Nerve cell in the brain
Down
2
Force that attracts objects together
3
Chemical element in table salt
6
Molten rock beneath Earth surface
7
Unit of force