Very Short Answer Type Questions
Q.1. On what factors do the mineral nutrients that are found in a particular soil depends upon ?
Ans. The mineral nutrients that are found in a particular soil depends on the rocks it was formed from.
Q.2. What causes movement of air?
Ans. Movement of air is caused by the uneven heating of the atmosphere in different regions of the Earth.
Q.3. What are biodegradable pollutants?
Ans. Pollutants which can be decomposed by organisms.
Q.4. We are lucky that ozone is not stable near to the Earth’s surface. Why? Give appropriate answer.
Ans. Ozone is poisonous in nature and thus harmful for the living beings.
Q.5. List out any two factors that determine the soil type.
Ans. Size of the particles, amount of humus, microorganisms present in the soil.
Q.6. Name the winds which bring rain in India.
Ans. (i) South-west monsoon.
(ii) North-east monsoon.
Q.7. What compounds of nitrogen cause air pollution and how are they released in air ?
Ans. Oxides of nitrogen cause air pollution. They are released by the combustion of fossil fuels.
Q.8. Why step farming is common in hills ?
Ans. It is done to prevent soil erosion.
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