Management of Natural Resources Science - Management of Natural Resources

Incomplete combustion of coal and petroleum:

1. Increases air pollution.
2. Increases efficiency of machines.
3. Reduces global warming.
4. Produce poisonous gases.

The correct option is :

Which one of the following is responsible for the sustenance of underground water?

Sustainable development means planned growth with minimum damage to the environment :

Which of the following is a natural resource?

The problems for criticism about large dams are that they :

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Forests are the hotspots of biodiversity.
Reason : They provide habitat to numerous species of plants and animals.

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Wild animals have increased greatly in number.
Reason : These wild animals are killed by poaching.

In the following questions, a statement of Assertion is given by the corresponding statement of Reason. Of the statements, mark the correct answer as :
Assertion : Coal is used for household purposes like cooking.
Reason : Petroleum is used in thermal power plants.

One of the main aim of management of forests and wildlife is to conserve the _________ which we haveinherited.

________ of water can be tested by using universal indicators.

Khadin is a traditional _________ harvesting system in Rajasthan.

________ store large quantity water for irrigation and electricity.

Chipko Andolan originated in ________.

The Chipko Andolan was associated with saving of tigers.

Ground water is protected from the contamination by human and animal wastes.

National parks and sanctuaries have been made to preserve natural habitats of wild animals and birds.

All the energy needs are mostly met by coal and petroleum reserves of the earth.

The water stored in ground evaporated easily.

List two items which can be easily recycled, but we generally throw them in the dust-bins.

Give one example each from your daily life where the household waste can be effectively reused and recycled respectively.

Give an example to illustrate that indiscriminate use of pesticides may result in the degradation of the environment.

What is meant by biological magnification?

"We need to manage our resources." List two reasons to justify this statement.

You being an environmentalist are interested in contributing towards the conservation of natural resources. List four activities that you can do on your own.

Why are coal and petroleum categorised as natural resources? Give a reason as to why they should be used judiciously.

The construction of large dams leads to social and environmental problems. List two problems of each category.

List four stakeholders which may be helpful in the conservation of forests.

What is meant by biodiversity? List two advantages of conserving forests and wild life.

1. Water is an elixir of life, a very important natural resource. Your Science teacher wants you to prepare a plan for a formative assessment activity, ‘‘How to save water, the vital natural resource’’. Write any two ways that you will suggest to bring awareness in your neighbourhood, on ‘how to save water’.
2. Name and explain any one way by which the underground water table does not go down further.

State in brief two ways in which non-biodegradable substances would affect the environment. List two methods of safe disposal of the non-biodegradable waste.

"Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues." State the reason to explain how and why it happens?

You have been selected to talk on “ozone layer and its protection” in the school assembly on ‘Environment Day’.

1. Why should ozone layer be protected to save the environment?
2. List any two ways that you would stress in your talk to bring in awareness amongst your fellow friends that would also help in protection of ozone layer as well as the environment.

Explain the following:

1. Sodium chloride is an ionic compound which does not conduct electricity in soild state where as it does conduct electricity in molten state as well as in aqueous solution.
2. Reactivity of aluminium decrease if it is dipped in nitric acid.
3. Metals like calcium and magnesium are never found in their free state in nature.

Explain why carbon forms compounds mainly by covalent bond. Explain in brief two main reasons for carbon forming a large number of compounds. Why does carbon form strong bonds with most other elements?

What are the various advantages of water stored in ground?

Why do we need to manage our natural resources?

What are the different techniques of water harvesting?

A man bought a device X which could cook pulses, vegetables and rice without using any fuel like wood, coal, kerosene or LPG, etc. This device did not work at night. It also took a lot of time for cooking.

1. Name the device X.
2. What is the source of energy which cooks food in this device?
3. What is the name of the process which traps energy in this device?
4. State one advantage (other than saving on fuel) or using such a device for cooking food.

After the examinations Rakesh with his friends went on a picnic to a nearby park. All friends carried cooked food packed in plastic bags or plastic cans. After eating the food some friends collected the leftover food and plastic bags etc and planned to dispose them off by burning. Rakesh immediately checked them and suggested to segregate the leftover food and peels of fruits from the plastic materials and respectively dispose them off separately in the green and red dustbins placed in the corner of the park.

1. In your opinion, is burning plastic an eco-friendly method of waste disposal? Why? State the advantage of the method suggested by Rakesh.
2. How can we contribute in maintaining the parks and roads neat and clean?

Coliform bacteria are mainly present in human faeces.
Drinking water should not contain more than 1 coliform per 100 mL.
The graph shows the amount of coliforms found in four water samples collected for a study.

1. What can be concluded from the graph?
A. Sample 1 is safe for drinking.
B. Sample 3 is least contaminated with human faeces.
C. Sample 2 and sample 4 are collected from the same water source.
D. Sample 1 and sample 2 contain the same concentration of coliforms.
2. Bathing water should not contain more than 1000 coliforms per 100 mL.
Which water sample is safe for bathing?
A. Sample 1
B. Sample 2
C. Sample 3
D. Sample 4
3. The same study was repeated over a period of ive years.
Which questions can be answered by comparing the results of the study?
Circle ‘Yes’ or ‘No’ for the correct response.

Can this question be answered by the study?	Yes or No
Is the pollution in the water sources increasing over time?	Yes/No
Which water source is the most polluted?	Yes/No
What are the chemical wastes present in the water sources?	Yes/No

4. Industrial wastes entering rivers often make the river water acidic.
How can this lead to a decrease in the population of many aquatic organisms?
5. Which of these activities should be prohibited in water bodies to control water pollution?
A. Fishing
B. Swimming
C. Rowing boats
D. Washing Clothes
The table lists the number of species of plants and animals in four forests over a time period

	Year - 1980		Year - 2000
	Plants	Animals	Plants	Animals
Forest 1	780	205	705	180
Forest 2	1255	410	1240	400
Forest 3	1740	685	1080	395
Forest 4	685	210	650	205

6. Which forest was the most biodiverse in the year 2000?
A. Forest 1
B. Forest 2
C. Forest 3
D. Forest 4
7. Which forest had the greatest loss of biodiversity between 1980 and 2000?
A. Forest 1
B. Forest 2
C. Forest 3
D. Forest 4
8. Which of these areas has the greatest biodiversity?
A. Desert
B. Rainforest
C. Grassland
D. Mountain
9. Which of these is a bad effect of burning fossil fuels?
A. Depletion of ozone layer
B. Increase in global warming
C. Increase in atmospheric nitrogen
D. Decrease in atmospheric oxygen
10. Which of these is an effect of construction of dams?
Circle ‘Yes’ or ‘No’ for the correct response.

Is this an effect of construction of dams?	Yes or No
Loss of biodiversity	Yes/No
Displacement of people	Yes/No
Increase in the frequency of floods	Yes/No