Across
1
Curved glass that refracts light
3
Precious yellow metallic element
5
Form of thermal energy
8
Biological catalyst
Down
2
Gas essential for breathing
4
Basic unit of life
6
Ball of burning gas in space
7
Unit of power
Curved glass that refracts light
Precious yellow metallic element
Form of thermal energy
Biological catalyst
Gas essential for breathing
Basic unit of life
Ball of burning gas in space
Unit of power