Across
1
Disturbance that transfers energy
3
Positive particle in nucleus
5
Unit of energy
8
Reddish electrical conductor
9
Force that attracts objects together
10
The Red Planet
Down
2
Unit of electric potential
4
Biological catalyst
6
Gas form of a liquid
7
Unit of heredity
8
Icy body with a tail near the sun
11
Amplified beam of light