Question

The earth is only planet that has life. give two natural conditions that favour life on earthdifference between grwat circle and small circle

Answer 1

The biggest reason for existence of human life on earth is the abundance of oxygen in earth's atmosphere.   Oxygen used by us is returned by plants who inhale carbon-dioxide and release oxygen.  Presence of water is the second factor contributing to life on earth.  Plants, animals and human beings use water for survival.  Great circle is an imaginary circular line which is of same size as earth whereas small circle is smaller in size than planet earth.

Answer 2

Answer:

the unique planet as it has an atmosphere which is rich on Oxygen about 21% and nitrogen about 78% throughout other planet have the atmosphere to the do not contain much oxygen the presence of oxygen has made life possible on the earth is evidences of water on it about 71% of Earth's surface is covered by ocean and sea throughout the earth is known as what we and blue planet also