Across
1
Form of thermal energy
3
Preserved remains of ancient life
5
Unit of heredity
7
The Red Planet
8
Path of a planet around the sun
Down
1
Second lightest element
2
Gas form of a liquid
4
Mass per unit volume
6
Group of similar cells
Form of thermal energy
Preserved remains of ancient life
Unit of heredity
The Red Planet
Path of a planet around the sun
Second lightest element
Gas form of a liquid
Mass per unit volume
Group of similar cells