Across
1
Disturbance that transfers energy
3
Smallest unit of an element
6
Naturally occurring inorganic solid
7
Force that attracts objects together
Down
2
Unit of force
4
Unit of power
5
Amplified beam of light
8
Path of a planet around the sun
9
Molten rock beneath Earth surface
10
Substance with pH above 7
11
Hottest planet in solar system