Across
1
Unit of heredity
3
Path of a planet around the sun
6
Icy body with a tail near the sun
7
Form of thermal energy
Down
2
Reddish electrical conductor
4
Glass that splits light into spectrum
5
Our home planet
8
Gas essential for breathing
Unit of heredity
Path of a planet around the sun
Icy body with a tail near the sun
Form of thermal energy
Reddish electrical conductor
Glass that splits light into spectrum
Our home planet
Gas essential for breathing