FIB : The whole mass of air surrounding the earth is called ____

Question

1. The whole mass of air surrounding the earth is called ____.
2. The water content of the earth is ____.
3. The parts of the earth i.e. the different strata of air, soil and water, where living organisms survive or live together with the abiotic component is called the ____.
4. The total number of organisms in a particular area is called ____. 
5. Any morphological, physiological, or behavioural attribute enabling an organism to survive and reproduce is its habitat is called ____.

Answer

1. atmosphere
2. hydrosphere
3. biosphere
4. population
5. adaptation