Chapter 14

āĻ…āϧ্āϝাāϝ় ā§§ā§Ē

Natural Resources

āĻĒ্ā§°াāĻ•ৃāϤিāĻ• āωāϤ্āϏāĻŦোā§°

Page-193

(āĻĒৃāώ্āĻ া-ā§§ā§¯ā§Š)

Questions-

(āĻĒ্ā§°āĻļ্āύ-)

1. How is our atmosphere different from the atmosphere on venus and Mars?

(āĻļুāĻ•্ā§° āφ⧰ু āĻŽংāĻ—āϞ āĻ—্ā§°āĻšā§° āĻŦাāϝ়ুāĻŽāĻŖ্āĻĄāϞ⧰ āĻĒā§°া āφāĻŽাā§° āĻŦাāϝ়ুāĻŽāĻŖ্āĻĄāϞ āĻ•েāύেāĻ•ৈ āĻĒৃāĻĨāĻ•?)

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2. How does the atmosphere act as a blanket?

( āĻŦাāϝ়ুāĻŽāĻŖ্āĻĄāϞে āĻ•েāύেāĻ•ৈ āĻ•āĻŽ্āĻŦāϞ⧰ āĻĻā§°ে āĻ•াāĻŽ āϕ⧰ে?)

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3. What causes winds?

(āĻŦāϤাāĻšā§° āĻ•াā§°āĻŖ āĻ•ি?)

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4How are clouds formed?

( āĻĄাā§ąā§° āĻ•েāύেāĻ•ৈ āĻ—āĻ āύ āĻšāϝ়?)

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5. List any three human activities that you think would lead to air pollution.

( āφāĻĒুāύি āĻŦাāϝ়ু āĻĒ্ā§°āĻĻূāώāĻŖā§° āϏৃāώ্āϟি āϕ⧰িāĻŦ āĻŦুāϞি āĻ­āĻŦা āϝিāĻ•োāύো āϤিāύিāϟা āĻŽাāĻ¨ā§ą āĻ•াā§°্āϝ্āϝāĻ•āϞাāĻĒā§° āϤাāϞিāĻ•া āĻĒ্ā§°āϏ্āϤুāϤ āϕ⧰āĻ•।)

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Page-194

(āĻĒৃāώ্āĻ া-⧧⧝ā§Ē)

Questions-

(āĻĒ্ā§°āĻļ্āύ-)

1. Why do organisms need water?

( āϜীā§ąāĻ• āĻĒাāύীā§° āĻĒ্ā§°āϝ়োāϜāύ āĻ•িāϝ়?)

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2. What is the major source of fresh water in the city/town/village where you live?

( āφāĻĒুāύি āĻŦাāϏ āϕ⧰া āϚāĻšā§°/āύāĻ—ā§°/āĻ—াāĻ“ঁāĻ–āύ⧰ āĻŽিāĻ া āĻĒাāύীā§° āĻĒ্ā§°āϧাāύ āĻ‰ā§ŽāϏ āĻ•ি?)

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3. Do you know of any activity which may be polluting this water source?

( āφāĻĒুāύি āĻāύেāĻ•ুā§ąা āĻ•োāύো āĻ•াā§°্āϝ্āϝāĻ•āϞাāĻĒ āϜাāύেāύে āϝিāϝ়ে āĻāχ āĻĒাāύীā§° āĻ‰ā§ŽāϏ āĻĒ্ā§°āĻĻূāώিāϤ āϕ⧰িāĻŦ āĻĒাā§°ে?)

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Page-196

(āĻĒৃāώ্āĻ া-⧧⧝ā§Ŧ)

Questions-

(āĻĒ্ā§°āĻļ্āύ-)

1. How is soil formed?

( āĻŽাāϟি āĻ•েāύেāĻ•ৈ āĻ—āĻ āύ āĻšāϝ় ?)

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2. What is soil erosion?

( āĻŽাāϟি āĻ–āĻšāύীāϝ়া āĻ•ি?)

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3. What are the methods of preventing or reducing soil erosion?

( āĻŽাāϟিā§° āĻ–āĻšāύীāϝ়া āĻĒ্ā§°āϤিā§°োāϧ āĻŦা āĻš্ā§°াāϏ āϕ⧰াā§° āωāĻĒাāϝ় āĻ•ি āĻ•ি?)

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Page-201

(āĻĒৃāώ্āĻ া-⧍ā§Ļā§§)

Questions-

(āĻĒ্ā§°āĻļ্āύ-)

1. What are the different states in which water is found during the water cycle?

(āĻĒাāύী āϚāĻ•্ā§°ā§° āϏāĻŽāϝ়āϤ āĻĒাāύী āĻĒোā§ąা āĻŦিāĻ­িāύ্āύ āĻ…ā§ąāϏ্āĻĨা āĻ•ি āĻ•ি?)

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2. Name two biologically important compounds that contain both oxygen and nitrogen.

(āϜৈā§ąিāĻ•āĻ­াā§ąে āĻ—ুā§°ুāϤ্āĻŦāĻĒূā§°্āĻŖ āĻĻুāϟা āϝৌāĻ— āωāϞ্āϞেāĻ– āϕ⧰া āϝ’āϤ āĻ…āĻ•্āϏিāϜেāύ āφ⧰ু āύাāχāϟ্ā§°’āϜেāύ āĻĻুāϝ়োāϟা āĻĨাāĻ•ে।)

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3. List any three human activities which would lead to an increase in the carbon dioxide content of air.

( āĻŽাāύুāĻšā§° āϝিāĻ•োāύো āϤিāύিāϟা āĻ•াā§°্āϝ্āϝāĻ•āϞাāĻĒā§° āϤাāϞিāĻ•া āĻĒ্ā§°āϏ্āϤুāϤ āϕ⧰āĻ• āϝিāϝ়ে āĻŦাāϝ়ুāϤ āĻ•াā§°্āĻŦāύ āĻĄাāχ āĻ…āĻ•্āϏাāχāĻĄā§° āĻĒā§°িāĻŽাāĻŖ āĻŦৃāĻĻ্āϧি āϕ⧰িāĻŦ।)

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4. What is the greenhouse effect?

(āϏেāωāϜ āĻ—ৃāĻš āĻĒ্ā§°āĻ­াā§ą āĻ•ি?)

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5. What are the two forms of oxygen found in the atmosphere?

( āĻŦাāϝ়ুāĻŽāĻŖ্āĻĄāϞāϤ āĻĒোā§ąা āĻ…āĻ•্āϏিāϜেāύ⧰ āĻĻুāϟা āĻĒ্ā§°āĻ•াā§° āĻ•ি āĻ•ি?)

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Exercises-

(āĻŦ্āϝাāϝ়াāĻŽ-)

1. Why is the atmosphere essential for life?

( āϜীā§ąāύ⧰ āĻŦাāĻŦে āĻĒā§°িā§ąেāĻļāϟো āĻ•িāϝ় āĻ…āĻĒā§°িāĻšাā§°্āϝ?)

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2. Why is water essential for life?

( āϜীā§ąāύ⧰ āĻŦাāĻŦে āĻĒাāύী āĻ•িāϝ় āĻ…āĻĒā§°িāĻšাā§°্āϝ?)

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3. How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?

( āϜীā§ąিāϤ āϜীā§ąāĻŦোā§° āĻŽাāϟিā§° āĻ“āĻĒā§°āϤ āĻ•েāύেāĻ•ৈ āύিā§°্āĻ­ā§°āĻļীāϞ? āĻĒাāύীāϤ āĻŦাāϏ āϕ⧰া āϜীā§ąāĻŦোā§° āϏāĻŽ্āĻĒāĻĻ āĻšিāϚাāĻĒে āĻŽাāϟিā§° āĻĒā§°া āϏāĻŽ্āĻĒূā§°্āĻŖ āϏ্āĻŦাāϧীāύ āύেāĻ•ি?)

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4. You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather?

( āφāĻĒুāύি āϟেāϞিāĻ­িāĻ›āύāϤ āφ⧰ু āĻŦাāϤ⧰ি āĻ•াāĻ•āϤāϤ āĻŦāϤ⧰⧰ āĻŦাāϤ⧰ি āĻĻেāĻ–িāĻ›ে। āφāĻĒুāύি āĻ•েāύেāĻ•ৈ āĻ­াāĻŦে āφāĻŽি āĻŦāϤ⧰⧰ āĻŦিāώāϝ়ে āĻ­ā§ąিāώ্āϝāĻĻ্āĻŦাāĻŖী āϕ⧰িāĻŦāϞৈ āϏāĻ•্āώāĻŽ āĻšৈāĻ›ো?)

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5. We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?

( āφāĻŽি āϜাāύো āϝে āĻŽাāύুāĻšā§° āĻŦāĻšুāϤো āĻ•াā§°্āϝ্āϝāĻ•āϞাāĻĒā§° āĻĢāϞāϤ āĻŦাāϝ়ু, āϜāϞ-āĻĒাāύী āφ⧰ু āĻŽাāϟিā§° āĻĒ্ā§°āĻĻূāώāĻŖā§° āĻŽাāϤ্ā§°া āĻŦৃāĻĻ্āϧি āĻĒাāϝ়। āĻāχ āĻ•াā§°্āϝ্āϝāĻ•āϞাāĻĒāϏāĻŽূāĻšāĻ• āύিā§°্āĻĻিāώ্āϟ āφ⧰ু āϏীāĻŽিāϤ āĻ…āĻž্āϚāϞāϞৈ āĻĒৃāĻĨāĻ• āϕ⧰িāϞে āĻĒ্ā§°āĻĻূāώāĻŖ āĻš্ā§°াāϏ āϕ⧰াāϤ āϏāĻšাāϝ়āĻ• āĻš’āĻŦ āĻŦুāϞি āφāĻĒুāύি āĻ­াāĻŦেāύে?)

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6. Write a note on how forests influence the quality of our air, soil and water resources.

 ( āĻŦāύাāĻž্āϚāϞে āφāĻŽাā§° āĻŦাāϝ়ু, āĻŽাāϟি āφ⧰ু āϜāϞāϏāĻŽ্āĻĒāĻĻā§° āĻŽাāύāĻĻāĻŖ্āĻĄāϤ āĻ•েāύেāĻĻā§°ে āĻĒ্ā§°āĻ­াā§ą āĻĒেāϞাāϝ় āϤাā§° āĻ“āĻĒā§°āϤ āĻāϟা āϟোāĻ•া āϞিāĻ–া।)

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Question Type By - Punya Hazarika

Post ID: DABP001891