EVERYDAY SCIENCE

Detailed explanation-1: -Total amount of water on earth is almost constant. It can occur in different states of matter i.e. ice, water and vapor. But, the total amount of water does not change appreciably.

Detailed explanation-2: -The amount of water on Earth is a constant.

Detailed explanation-3: -Thanks to the water cycle, our planet’s water supply is constantly moving from one place to another and from one form to another. Things would get pretty stale without the water cycle!

Detailed explanation-4: -The overall amount of water on our planet has remained the same for centuries and as far back as scientists can calculate. However, the human population on our planet grows exponentially.