Across
1
Molten rock beneath Earth surface
2
Reddish electrical conductor
4
Amplified beam of light
5
Measure of matter in an object
7
Force that attracts objects together
8
Hottest planet in solar system
10
Particle of light
Down
2
Solid with repeating atomic pattern
3
Smallest unit of an element
6
Naturally occurring inorganic solid
7
Precious yellow metallic element
9
Gas essential for breathing