Blob was in a _________ form.

Which  term  is often used to refer  the densest parts of the earth?

Algae spread over coral reefs that have undergone_______________ and they cause destruction of the reefs.

____________ is formed by numerous biomes .

____________ includes all the water found on the surface of the earth.

The phenomenon which maintains a balance in the amount of the atmospheric carbon dioxide is called

Important fishing centr of the world

The item that is not an effect of tides

___________ is a combination of all ecosystems.

The inorganic part of the earth is called