Across
1
Solid with repeating atomic pattern
4
Natural satellite of Earth
5
Measure of matter in an object
6
Force that attracts objects together
7
Second lightest element
8
Precious yellow metallic element
9
Reddish electrical conductor
Down
1
Icy body with a tail near the sun
2
Amplified beam of light
3
Unit of electric potential
4
Tissue that contracts for movement