Across
1
Positive particle in nucleus
2
Precious yellow metallic element
5
Mass per unit volume
6
Biological catalyst
10
Hottest planet in solar system
11
The Red Planet
12
Form of thermal energy
Down
2
Unit of heredity
3
Unit of power
4
Path of a planet around the sun
7
Unit of force
8
Solid with repeating atomic pattern
9
Absolute temperature scale unit