Question 2:

Soil is classified on the basis of its nature and composition. In India we find six main types of soils: 1. _______ , which is rich in loam and clay; 2. _______ , which has predominantly clay; 3. ______, which is sandy to loam; 4. ______, which is stony sandy soil; 5. ______, which is sandy and poor in organic carbon; and 6. ________, which has porous clay rich in iron and aluminium hydroxides.

Question 3:

Soil contents like ______, ______, sand, etc. are widely used for construction of homes, buildings, roads etc.

Question 4:

______ minerals include iron, aluminium, copper, tin, nickel, silver, gold and platinum etc.

Question 5:

Air gets polluted due to presence of pollutants in the _______ and it can result from both human and natural occurrences.

Question 6:

The word ____ is derived from a latin word ‘solum’ meaning earthly material in which plants grow.

Question 7:

__ % of earth’s surface is covered with water.

Question 8:

________  are also crucial for economic development of a country as they contribute to urbanisation, industrialisation, transportation and communication systems, and it becomes important that ______ are sustainably used.

Question 9:

Burning of ________, wood and rubber also release harmful gases and pollutes the air.

Question 10:

__________ and agricultural activities are responsible for emission of greenhouse gases into the air. Trees clean the air by storing carbon dioxide, but due to heavy deforestation air pollution is on the rise.