Across
1
Precious yellow metallic element
4
Element found in all living things
5
Natural satellite of Earth
9
Naturally occurring inorganic solid
10
Force that attracts objects together
11
Compound containing oxygen
Down
2
Absolute temperature scale unit
3
Gas essential for breathing
4
Icy body with a tail near the sun
6
Particle of light
7
Amplified beam of light
8
Chemical element in table salt
12
Disturbance that transfers energy