Review Questions - Natural Resources - Notes | Study Science Class 9 - Class 9

Review Questions
Give answer of following questions

Q1. What are the basic needs of life to exists ?

Q2. How is our atmosphere different from the atmospheres on venus and mars ?

Q3. What is biosphere ?

Q4. What causes winds ?

Q5. How clouds are formed ?

Q6. Name any three human activities that causes air pollution.

Q7. What are the effects of air pollution on human health ?

Q8. Give the definition of Resources.

Q9. Give the definition of air pollution.

Review Questions

Very short answer type questions

Q1. What is weathering ?

Q2. Mention the components of soil.

Q3. What is water pollution ?

Q4. Mention the percentage of fresh water.

Q5. Define the term "Soil erosion".

Q6. Give the definition of "humus".

Q7. Mention the various factor that make soil.

Q8. How water play its role in weathering ?

Q9. How excessive use of fertilizers harmful to fertility of soil ?

Q10. Mention the other factors besides availability of water play significant role in deciding the sustainability of life in a region.

 Short answer type questions

Q1. Write importance of water to the living organisms.

Q2. Give importance of sustainable agriculture.

Q3. What is soil erosion ? Mention main causes of soil erosion.

Q4. Write significant role of living organisms in the formation of soil.

Q5. Give definition of water pollution. Mention the effects of water pollution.

Q6. What are the harmful effects of thermal pollution of water ?

Q7. Why use of polluted water irrigation decreases soil fertility ?

Q8. Write down the differences between exhaustible and inexhaustible resources.

Long Answer type questions

Q1. Write a note on water polluiton.

Q2. Write a note on soil, including following points :-

(a) weathering (b) component of soil (c) Importance of sustainable agriculture (d) Soil erosion

 Reasoning answer type question

Q1. Why terrestrial life forms require fresh water ?

Q2. How dissolved oxygen in water is very important factor ?

Q3. How humus affect soil quality ?

Q4. How lichens are important in succession on rock ?

Q5. Why we should not be use chemical pesticides ?