Water causes refraction of light.
Water is a compound of hydrogen and oxygen.
A compound of hydrogen and oxygen causes refraction of light.
What causes a refraction of light?
[1] compound of hydrogen oxygen
[2] focusing a lens
[3] that material's properties
[4] photosynthetic pigments?
[5] oxidation reaction
[6] a hemisphere is tilted away from the sun
[7] sunlight beams
[8] solid, liquid, gas