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CBSE Class 10 Biology - Management Of Natural Resources
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Q1)What are three R’s which will help in conservation of environment?explain
Q2)give one difference between afforestation and reforestation.
Q3)Name two elements other than carbon which can lead to formation of acid rain?
Q4)Why is “Amrita Devi National award” instituted by government of India?
Q5)What is ganga action plan and when was it launched?
Q6)What is ‘reuse’ strategy? Give some example which prove that this strategy is better than recycling?
Q7)Mega projects like dams always create some problems if they are ill planned? Explain giving example.
Q8)How did ChipkoAndolan help in forest conservation?
Q9)there are various stake holders who are interested in the maintenance of forests.Categorise them into 4 categories.
Q10)Mr.A.K.Banerjee has also made a name as a conservationist.Expalin how did he achieve this?
Q11)Giveatleast 3 examples where enthusiasts have taken strict steps to conserve forests and wildlife.(hint-chipkoandolan, Amrita Devi Bishnoi, A.K.Banerjee)
a)mining leads to pollution
b)fossils fuel on burning create air pollution.
c)dams do not always have positive effects.
Q13)What are merits and demerits of constructing a dam?
Q14)How are forests useful to us? which industries are totally dependent upon the products of forests? what steps should be taken which will help in sustaining the forests as well help in providing resources to industries?
Q15)Do all stake holders have same interests and goals in forests management? If not how does it differ? Explain by means of ne example.
Question. Why should we conserve forests and wildlife?
Ans. Conservation of forest is important as forest is useful to us in many ways:
(i) Provides raw material for timber industry.
(ii) Prevents soil erosion and flood.
(iii) Provides medicines, herbs, gum, resin.
(iv) Provides habitat to many animals.
(v) Maintain water-cycle by bringing rain fall.
Wildlife conservation is important because:
(i) It maintains ecological balance in nature.
(ii) It also maintains the forests by facilitating growth of plants in different places by dispersing seeds.
(iii) By grazing grass, it also maintains the soil fertility.
(iv) It also helps in cleaning of forest.
Question. What would be the advantages of exploiting resources with short-term areas?
Ans. Exploitation of resources with short-term aims means misuse of the resource and harm to the earth.
Question. Which one of the following gases is the major constituent of biogas?
Ans. (c) CH4
Question. From the list given below pick the item that is not a natural resource-
Ans. (c) Electricity
Question. The pH range most conducive for life of fresh water plants and animals is
(a) 6.5 – 7.5
(b) 2.0 – 3.5
(c) 3.5 – 5.0
(d) 9.0 – 10.5
Ans. (a) 6.5 – 7.5
Question. Find out about the traditional systems of water harvesting/management in your region.
Ans. The traditional systems of water harvesting management:
• Bandharas and talc in Maharashtra
• Bundhis in Madhya Pradesh and Uttar Pradesh
• Kulhs in Himachal Pradesh
• Khadins, tanks and nadir in Rajasthan.
• Ahars and pynes in Bihar.
Read the following section of an article about the ozone layer.
The atmosphere is an ocean of air and a precious natural resource for sustaining life on the Earth. Unfortunately, human activities based on national/personal interests are causing harm to this common resource, notably by depleting the fragile ozone layer, which acts as a protective shield for life on the Earth. Ozone molecules consist of three oxygen atoms, as opposed to oxygen molecules which consist of two oxygen atoms. Ozone molecules are exceedingly rare: fewer than ten in every million molecules of air. However, for nearly a billion years, their presence in the atmosphere has played a vital role in safeguarding life on Earth. Depending on where it is located, ozone can either protect or harm life on Earth. The ozone in the troposphere (up to 10 kilometers above the Earth’s surface) is “bad” ozone which can damage lung tissues and plants. But about 90 percent of ozone found in the stratosphere (between 10 and 40 kilometers above the Earth’s surface) is “good” ozone which plays a beneficial role by absorbing dangerous ultraviolet (UV-B) radiation from the Sun.
Without this beneficial ozone layer, humans would be more susceptible to certain diseases due to the increased incidence of ultra-violet rays from the Sun. In the last decades the amount of ozone has decreased. In 1974 it was hypothesized that chlorofluorocarbons (CFCs) could be a cause for this. Until 1987, scientific assessment of the cause-effect relationship was not convincing enough to implicate CFCs. However, in September 1987, diplomats from around the world met in Montreal (Canada) and agreed to set sharp limits to the use of CFCs.
1. Ozone is also formed during thunderstorms. It causes the typical smell after such a storm. the author of the text distinguishes between “bad ozone” and “good ozone”.
In terms of the article, is the ozone that is formed during thunderstorms “bad ozone” or “good ozone”?
Choose the answer and the explanation that is supported by the text
Ans. Full credit: B. Bad. It is formed in the troposphere.
2. “Without this beneficial ozone layer, humans would be more susceptible to certain diseases due to the increased incidence of ultra-violet rays from the Sun.”
Name one of these specific diseases.
Ans. Full credit: Answers which refer to skin cancer.
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