problem 1: In brief describe the components which constitute our environment.

problem 2: How does the present day atmosphere distinct from the primitive atmosphere of earth?

problem 3: The lowest 100km of the atmosphere are instead uniform in composition. describe why?

problem 4: Describe the thermal profile of atmosphere with the help of an appropriate diagram.

problem 5: Fill up the blanks:

a) In early atmosphere on earth ………….. gas had maximum concentration.
b) Most of the water-vapor in the atmosphere is present in the layer ……………
c) Maximum ozone concentration is found in the layer ……….
d) Height of troposphere is maximum over ………….
e) The stable layer above troposphere is termed as …………….

problem 6: Illustrate the term soil? Describe its layered structure with the help of an appropriate diagram.

problem 7: Define the following:

a) Bulk Density
b) Particle Density
c) Pore space

problem 8: What do you mean by soil texture? How can the soils be categorized on the basis of soil texture?

problem 9: What are different types of soil water?

problem 10: How does the soil air distinct from atmosphere in its composition?

problem 11: What are the various types of soils?