Across
1
Path of a planet around the sun
3
Basic unit of life
6
Ball of burning gas in space
7
Biological catalyst
Down
2
Icy body with a tail near the sun
4
Smallest unit of an element
5
Amplified beam of light
8
Form of thermal energy
Path of a planet around the sun
Basic unit of life
Ball of burning gas in space
Biological catalyst
Icy body with a tail near the sun
Smallest unit of an element
Amplified beam of light
Form of thermal energy