Across
1
Reddish electrical conductor
3
Hottest planet in solar system
4
Force that attracts objects together
5
Mass per unit volume
9
Unit of heredity
Down
2
Magnetic metallic element
3
Infectious microscopic agent
4
Precious yellow metallic element
6
Disturbance that transfers energy
7
Tissue that contracts for movement
8
Blocking of light by a celestial body