Across
1
Gas essential for breathing
5
Unit of force
7
Precious yellow metallic element
Down
2
Unit of electric potential
3
Curved glass that refracts light
4
Biological catalyst
6
Particle of light
8
Natural satellite of Earth
Gas essential for breathing
Unit of force
Precious yellow metallic element
Unit of electric potential
Curved glass that refracts light
Biological catalyst
Particle of light
Natural satellite of Earth