" Q.3.Why oceans do not freeze? Give reason."

Sea water does not freeze at 0^(@)C .Give reason.

Out of the following solutions which has the lowest freezing point ? Give reasons

Explain why : Rivers and lakes do not freeze easily?

Why do most carnivores live in forests? Give reason.

Why do animals not graze upon ferns ? Give reason.

Why arteries are rigid? Give reasons

Water in lakes and ponds do not freeze at once in cold countries. Give a reason in support of your answer.