In this post, you will learn about NCERT class 10 science activity solutions chapter 16. You will find all the activities of the chapter Management of Natural Resources.
Chapter 16- Management of Natural Resources Activity solutions
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Activity 16.1 Class 10 Science Explanation
Activity - Find out about the international norms to regulate the emission of carbon dioxide. Have a discussion in class about how we can contribute towards meeting those norms.
Discussion-Carbon dioxide is a major greenhouse gas. This is mainly released into the atmosphere by burning fossil fuels like coal and petroleum. All the countries of the world are trying to reduce its emission as much as possible. In different countries of the world, the following norms are there to regulate CO2 emission.
According to
Kyoto Protocol India is to reduce CO2 emission by 5% of 1990 level,
during 2008-12.
ü In
Europe. Euro 4, Euro 5 (Jan. 10) and Euro – 6
will be effective January 11 2014. India.
ü In
US the CO2 emission is given in pounds of carbon dioxide per
Megawatt hour (ibs. CO2/MWHr). These are known as Tier 1 and Tier 2.
ü Bharat
Stage emission norms standards are emission standards instituted by the government
of India.
Bharat Stage III norms have been enforced
across the country.
Bharat Stage IV emission norms are in place since 2010.
We can contribute towards meeting those norms by.
i. reducing the use of vehicles as far as possible.
ii. increasing engine efficiency,
iii. by increasing vehicle efficiency,
iv. increasing driving efficiency,
v. by controlling traffic jams,
vi. by spreading this awareness and knowledge to others.
vii. by improving quality of road.
Activity 16.2 Class 10 Science Explanation
Activity - There are a number of organizations that seek to spread awareness about our environment and promote activities and attitudes that lead to the conservation of our environment and natural resources. Find out about the organisation (s) active in your neighbourhood/village/town/city.
Find out how you can contribute to the same cause.
Discussion-International / National organisations have their branches/volunteer in many cities of our country. These organisations are –
WWF(World Wide Fund for Nature) – This organization is active in the conservation
of wildlife.
PETA(People for Ethical Treatment of Animals) - Cruelty
against animals, has branches in many cities.
BNHS (Bombay Natural History Society) – Wildlife
conservation.
CSE(Centre for Science and Environment)- It publishes a magazine 'Down to Earth' for environmental awareness.
RAJENVIS
(Rajasthan Environmental Information System)- a governmental organisation for
spreading environmental awareness
These are some examples of organisations, but students are advised to find organisations in their locality.
· We
can contribute towards the same cause by making an Eco club or Nature club for
spreading awareness about the conservation of natural resources.
· We
should start saving energy and resources at our home immediately.
· We
should arrange programs in school to
make aware the students about conservation of natural resources, saving energy
etc.
Activity 16.3 Class 10 Science Explanation
Activity- Check the pH of the water supplied to your house using a universal indicator or litmus paper.
Also check the pH of the water in the local water body (pond, river, lake, stream).
Can you say whether the waste is polluted or not on the basis of your observations?
Discussion-
PH – Power of hydrogen ion concentration, it is a scale to measure the concentration of hydrogen ions.
The pH of the water gives us an idea
about its acidity or alkalinity. pH can be easily checked with the help of a universal indicator or litmus paper. A universal indicator is a pH indicator. It
shows colour changes over a pH value range from 1-14.
Blue litmus paper turns red in acidic pH
and red litmus paper turns blue if the pH is basic (alkaline).
Red and orange colour show acidity, green
colour shows neutral stage and blue / violet colour show alkalinity.
The water supplied to the house is generally
neutral i.e., its pH is 7, but it may be acidic or alkaline due to the presence of
other substances in it.
The PH of water bodies may also vary
because of salts present in it.
The pH of water of the local body may be
neutral/acidic or alkaline. If the water is acidic or alkaline it means it is
polluted.
Acidity indicates pollution. Hard water
is generally alkaline.
Activity 16.4 Class 10 Science Explanation
Activity - Have you ever visited a town or village after a few years of absence? If so, have you noticed new roads and houses that have come up since you were there last? Where do you think the materials for making these roads and buildings have come from?
· Try
and make a list of the material and their probable source.
· Discuss
the list you have prepared with your classmates. Can you think of ways in which
the use of these materials be reduced?
Discussion-
When we go to our town or village after a
period of time we find New constructions – roads, houses, hospitals etc. different
materials are used to make these roads, houses etc some of the materials are given in
the list below -
List of materials and their probable source.
Material Source
Bitumen (Coal tar) Petroleum
product
Cement Lime
Stone
Sand From
a river bank
Bricks Clay
Wood Felling
of tree, cutting of tress
Metals – Iron, aluminium Metallurgy
Water ponds
,River, lakes etc.
The production of cement and bricks uses lots of coal as a source of energy.
Stones can be used in place of bricks to reduce the raw material like clay. The use of clay for making bricks is turning the field unproductive
because the fertile layer of soil is collected to do so.
Activity
16.5 Class 10 Science Explanation
Activity-
Make a list of forest produce that you
use.
· What
do you think a person living near a forest would use?
· What
do you think a person living in a forest would use?
· Discuss
with your classmates how these needs differ or do not differ and the reasons
for the same.
Discussion -
(a) A person living near a forest uses – Wood, bamboo, thatch (for making the roof of a hut), and herbs such as medicine, firewood.
(b) A person living in a forest would use wild fruits and vegetables as food. He will get fodder for his cattle from the forest. He may collect honey, gums, resin etc.
( c) A person living in a city – Wood for making furniture, doors, paper.
Forests are the main sources of raw
materials we use. Forest fulfils almost all the basic necessities of man. A
person living nearby forest or in the forest is directly dependent on the forests for their needs but in a city, we arrange some
items made in factories and arrange food from agricultural fields but we indirectly
depend on the forests.
Activity 16.6 Class 10 Science Explanation
Activity - Find out about my two forests produce that are the basis for industry. Discuss whether this industry is sustainable in the long run. Or do we need to control our consumption of these products?
Discussion- Wood is required for timber and pulp/paper industry – Tendu leaves are required for making bidis. No, timber and paper industries are not sustainable in long run. The population of the world is increasing day by day and the pressure on the raw material for these industries is also increasing. Industries consider the forests as a source of raw materials and they are not interested in the sustainability of the forests.
We should control our consumption of
these products, secondly, we should develop alternate options for these
materials.
Activity 16.7 Class 10 Science Explanation
Activity - Debate the damage caused to forests by the following:(a) Building rest houses for tourists in national parks.
(b) Grazing domestic animals in national parks.
(c) Tourists throwing plastic bottles/covers and other litter in national parks.
Discussion-
(a) Construction of houses in national parks damages forests because it requires the construction of roads also to their house. For this trees are cut and the habitat of wildlife is destroyed.
Cement or synthetic material used in the construction of houses pollute the environment. The light and sound of the house make many shy birds and animals annoyed and stressed. It disturbs the ecological balance of the area.
(b) Grazing of domestic animals reduces the amount of folder/grass available to wild herbivores animals. It also leads to soil erosion. These domestic cattle may spread diseases in the forest.
(c)Plastics and other material thrown by tourists pollutes the environment. These may contain some toxic substance injurious to the health of wild animals. Polythene eaten by an animal may cause pain and disease. Non-biodegradable materials pollute the environment more severely.
Activity 16.8 Class 10 Science Explanation
Activity - Village suffering from chronic water shortage surround a water theme park in Maharashtra. Debate whether this is the optimum use of the available water.
Discussion- Water is needed by all organisms and is one of the most important natural resources. It should be managed in a sustainable manner and its availability is assured to all. Water is needed by all. Local people have the first right to local sources of water. They should be allowed to use the water.
Water parks are built only for amusement or entertainment. The water theme park owner arranges water from some other sources through pipelines after paying some amount but this is not fair when there is water shortage prevalent in the surrounding area. In the areas of acute water shortage water theme parks should not be allowed.
Activity- Study the rainfall patterns in India from an atlas. Identify the regions where water is abundant and the regions of water scarcity.
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Discussion-The
rainfall pattern is given in the above picture. Most of the parts of our
country receive good rainfall. Only the western part of the country i.e.,
Rajasthan and Gujarat receive less rainfall. Rainfall distribution is unequal.
Abundant water is available in Kerala region
of western ghats, North-East States etc. There is an acute shortage of water in
Rajasthan. Sometimes due, to unpredictable rain even the areas of abundant
water suffer from drought-like conditions.
Activity 16.10 Class 10 Science Explanation
Activity - Coal is used thermal power stations and petroleum products like petrol and diesel are used in means of transport like motor vehicles, ships and aeroplanes. We cannot really imagine life without a number of electrical appliances and constant use of transportation. So can you think of ways in which our consumption of coal and petroleum products be reduced.
Discussion -
Coal, petroleum products are used to generate energy
which we use in day to day to life but these resources are limited so we will
have to reduce consumption of these fossil fuels. We can follow activities –
1. We
can use public transport instead of using a personal motor car or scooter.
2 . We
can use fluorescent bulbs or CFL
3. We
can use stairs instead of using of lifts
4. Wear
extra woolen clothes instead of using heating devices
5. We
should keep our appliances and machines in good conditions.
Activity 16.11 Class 10 Science Explanation
Activity - You must have heard of the Euro I and Euro II norms for emission from vehicles. Find out how these norms work towards reducing air pollution.
Discussion
Major pollutants from vehicles are carbon
monoxide, Hydrocarbons, Oxides of nitrogen, and hydrocarbon. In these norms, the
pollution generated by vehicles is reduced in different stages. When the first target
is achieved then-new norms are set.
Also useful contents for you
2. Extra questions of chapter 16
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