To what elements do the four houses Gryffindor, Ravenclaw, Hufflepuff and Slytherin correspond?

Gryffindor - Fire -
Can give warmth and protection, but can kill swiftly and painfully

Ravenclaw - Air -
Is cold/warm, but can take away your oxygen fast

Hufflepuff - Earth -
Gives you reason to live, but it can change into disasters as well, if not carefull

Slytherin - Water -
Soothing and tender, warm or cold, can quench thirst, but can easily let you drown

Xxx

Slytherin = water
Ravenclaw = air
Hufflepuff = earth
Gryffindor = fire

Hope the above replies your question.