Across
1
Force that attracts objects together
4
Amplified beam of light
5
Disturbance that transfers energy
7
Second lightest element
8
Smallest unit of an element
Down
2
Nerve cell in the brain
3
Naturally occurring inorganic solid
6
Unit of energy
Force that attracts objects together
Amplified beam of light
Disturbance that transfers energy
Second lightest element
Smallest unit of an element
Nerve cell in the brain
Naturally occurring inorganic solid
Unit of energy