___________ layer contains electrically charged irons that help in communication.

The atmosphere is divided into ________ concentric layers.

__________ is the most important gas.

__________ is the coldest layer in the atmosphere.

Atmospheric ________ is used to make chemical fertilizers.

________ is an unique planet.

The two main gases present in the atmosphere are ____________.

During photosynthesis green plants absorb ________.

Our knowledge about the atmosphere is based on the information received through ___________.

Life exists on the Earth primarily due to the _________ main realms.