Across
1
Basic unit of life
3
Form of thermal energy
4
Hottest planet in solar system
5
Force that attracts objects together
6
Disturbance that transfers energy
7
Glass that splits light into spectrum
9
Chemical element in table salt
10
Biological catalyst
11
Solid with repeating atomic pattern
Down
1
Reddish electrical conductor
2
Group of similar cells
4
Infectious microscopic agent
5
Unit of heredity
7
Positive particle in nucleus
8
Absolute temperature scale unit