There are _______ spheres of earth.

Which of the following is a biotic factor?

_____ contains all the gases that cover the earth.

Name the sphere that contains all life.

Observe the following image. It belongs to ________.

Carbon dioxide belongs to________.

Which of the following sphere consists of all living things?

______________ is the main home of human being.

______ consists of oxygen.

Select the correct order of A, B, C and D in the given image.

Mountains found on the _________surface of earth.

Which of the following sphere contains air?

What is A and B in the given image?

The hydrosphere is the total amount of water on a planet. 
The rigid outer part of the earth consists of the crust and upper mantle.

What is the percentage of water present in the ocean?

Which of the following is present in large amounts in the mist?

Lava from volcano belongs to_________.

When the magma's released, it becomes known as lava.