Explain why life on earth depends on water.

answer: all life on earth uses a membrane that separates the organism from its environment. to stay alive, the organism takes in important materials for making energy, while shuttling out toxic substances such as waste products. in this regard, water is essential simply because it's a liquid at earth-like temperatures.

-nfforlfe

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."