MANAGEMENT OF NATURAL RESOURCES
Class : X
1. A poster suggests following lifestyle actions on the part of families/individuals:
(i) Use soaps made of vegetable oils instead of using synthetic detergents.
(ii) Use H2O for bleaching purpose instead of using chlorine based bleaching agents.
(iii) Use plastic cans for neatly storing substances.
(iv) Use bicycle for travelling small distances than petrol or diesel vehicles.
Answer the following questions based on above information:
(i) Which of the above lifestyle suggestion promote green chemistry?
(ii) Which environmental values are promoted through these lifestyles?
(iii) Suggest two additional lifestyles actions for promotion of green chemistry.
2. Saving for the rainy day is a popular proverb which means saving something for
the times when it may not be available. Examine the practice of Rain water
harvesting.
Answer the following questions based on the above situation:
i) What is rain water harvesting?
ii) Which values are promoted through the practice of rain water harvesting?
iii) Suggest two activities on the part of the school to promote this practice. How can these
activities promote environmental practices in the community?
iv) Suggest two actions on your part to follow these values.
3. You observe that the Gardner working in the park near your house collects the
dry leaves from the garden and burns it. He also uses synthetic fertilizers for
growth of plants.
i) How is such an act harmful?
ii) How can the gardener be convinced to change the practices?
iii) Which environmental value the gardener is disrespecting?
4. A group of five friends decide to go to a nearby bakery to celebrate Raja’s
Birthday .Each one decides to go on their own Scooter. Raju objects to this.
i) Why did Raju object? What could the consequences be?
ii) What value is Raju exhibiting?
5. Mrs. Kapil Collected books, toys warm clothes etc for redistribution to the needy
i) What is the objective fulfilled?
ii)Comment upon the values shown by Mrs. Kapil
OUR ENVIRONMENT
1.Manoj went to a tea stall to have a cup of tea. He objected when the shopkeeper gave the tea
in a plastic cup and advised him to serve the tea in paper cups hence forth.
i) How are plastics harmful to our environment
ii Why does Manoj feel that paper cups are a better substitute?
iii) What values does Manoj exhibit.
2. Ayush went to puri in Orissa on a holiday recently. There were lots of tourists in the beach
and the beach was very dirty with plastic, paper,Polythene bags with waste food, mineral water
bottle, etc. Ayush decided to do something to save the beach.
i) Discuss how plastics are harmful to the environment?
ii) What can Ayush do to save the beach from becoming a dumping ground?
iii) How can government help in keeping the beach clean?
3. Ajay observed Vishal using a variety of perfumes and shaving sprays. He advised him to
minimize the use of the same as it would destroy the ozone layer.
i) How does Ozone layer protects us?
ii) What are the causes of depletion of ozone layer?
iii) What values does Ajay exhibit by giving such an advise?
4. Raman lives in a coastal village. He is the son of a fisherman. Whenever any unwanted animal
comes in the net ,instead of killing it ,he puts back in the sea
a) What would have happened ,had he killed those animals?
b) Give one reason to justify that Raman’s action is environment friendly.
c) How can you contribute in the preservation of flora and fauna around you ?
Mention any two steps.
5.We need to increase food production to meet the needs of the growing population .In this
context do you support the use on fertilzers,pesticides and such chemicals in agriculture. Give
any three value points to support your answer.(3)
6. Shyam can never have a party without the use of disposable plastic plates,cups,spoons etc.
What is your opinion about this practice.Imagine a debate with Shyam on this matter What
would be the arguments put forth by the two of you?(5)
7. .Why do we need to save the Tiger . It does not help us in anyway? Ramu questioned the
teacher when they were discussing about the campaign they had seen on TV.
Can you provide reasons why Ramu’s questioning is justifiable or not?(2)
Why do you think that Corporate houses support this campaign?(1)
HOW DO ORGANISMS REPRODUCE
1. Menstruation is not a disease.
i)What is menstruation?
ii) Do you think females should be prevented from taking part in all regular
activities during this period .Justify your answer.(3)
2. Do you think it should be made mandatory for every married couple to have only one or two
children.
i) What is contraception
ii) What are the different methods of contraception?
iii) What values is the Government including
3. Mrs. Kumar is pregnant for the last three months and she goes for regular check-up to her
doctor. During her last visit, the doctor asked Mrs. Kumar to get an ultrasound done. Both Mr.
and Mrs. Kumar went to a radiologist and got the ultrasound done. Once the ultrasound is over,
Mr. Kumar asked the doctor whether the baby in the womb is a boy or a girl.
(a)
Should the doctor disclose the sex of the child to the couple?
(b)
Is it ethical to disclose the sex of a child?
( c)How is sex determined in Humans.
4. In a village the sex ratio is very low due to large number of cases of female infanticide. A
man from the same village takes his pregnant wife to the doctor to find out whether the foetus
is a girl or a boy. The doctor performs test and tells them it is a girl.
Answer the following question based on the above situation :
i) Which values are not promoted by the doctor?
ii) How can the malpractices be prevented in the given situation be stopped?
5. Recently the news carried an article about female foeticide and harassment of women.
i) What is female foeticide? What may be the reason for such a crime?
ii) What is your approach towards the problem?
6. Rosie wants to give a left over piece of bread which was two three days old to a beggar who
came to their home. Her mother scolded her and didn’t allow her to give that piece to that poor
hungry man. She showed the cottony white patch on the bread.
i) Name the cottony white patch on the bread.
ii) How is it formed on the piece of bread?
iii) What moral values were given by Rosie’s mother?
CARBON AND COMPOUNDS
1. Robin has a family of four and drinks alcohol daily. Jolly helped Robin to lose his habit.
i)Name the Chemical in alcohol
ii) How does it after our health ?
iii) What qualities are shown by Jolly?
2. Amit is an industrialist. His chemical factory needs ethanol as a solvent. He suggested
purchasing denatured alcohol for the above purpose.
i) Explain what the reason is and value behind it?
ii) What value is he trying to inculcate ?
3. Food clothes, medicines ,books and several things of daily use contain carbon as the
Basic constituents. The basic carbon compounds were extracted from natural substances.
In other words, all living structures are carbon based. The amount of carbon present in
The earth’s crust and in the atmosphere is quite meagre.Carbon forms the largest number
Of compounds, more than any other tetravalent element.
i)What property of carbon contributes to the formation of a large number of
compounds?
ii) Define the properties.
iii) What values can we imbibe from these properties of carbon?
(iii) Due to small amount of carbon available in nature, is it necessary to start a Drive
“Save carbon”.
4. Vijay saw his auto driver consuming alcohol in a liquor shop. He immediately cautioned him
& explained its ill effects also drawing his attention to the poster with a warning “ Consuming
alcohol is Bad for health”
i) Name the chemical in alcoholic drinks . Write its formula.
ii) How does it effect our health?
iii) What values do you think are depicted by Vijay.
5. Anu and Meenu are neighbours. Anu is studying in 10 th standard and Meenu is in 9 th
standard.Anu observed that while bathing Scum is formed and an insoluble substance
remains sticking to the body even after washing with water. She shared this problem
with Anu and Anu explained why it happened. Anu gave a solution to this problem and
Meenu now takes bath comfortably.
i)What is the reason for formation of Scum?
ii)What was the solution that Anu gave to Meenu ?
iii)What value was shown by Anu ?
6. Ethanol commonly called as alcohol is an excellent solvent and is used in the production
of medicines. However in spite of its benefits to man its impact on social behavior has
always been questioned. Alcoholism is a curse in the lives of so many people in the
society.Alcoholists is not only destroying their lives but also a threat to the lives of
others by getting involved in anti-social activities.
i)
Comment on the statement _ ‘ should production of alcohol be banned’, give
three reasons to justify
ii)
As a student what initiative would you take to create awareness against
alcoholism?
Give two suggestions.
7. Raju and Ramu are class mates. Ramu is staying in a hostel and eats food outside
whereas Raju’s house is near by. Slowly health of Ramu started deteriorating .He started
feeling ill and became irregular in classes. Friends started avoiding him since he was not
able to pay attention to his studies.Raju observed this and one day he went to take
lunch with Ramu and he found that the food served was cooked in animal fats .Raju
advised Ramu to change his place of eating and started sharing his lunch full of
vegetables cooked in vegetable oils with Ramu.Slowly Ramu recovered and started
concentrating in studies.
i)What difference in the food of Ramu which improved his health ?
ii)What was the value shown by Raju ?
Iii)How are animal fats harmful?
Iv) What is hydrogenation?
PERIODIC CLASSIFICATION OF ELEMENTS.
1.Reshma has neatly arranged books of various subjects in her bookshelf.
i)
ii)
How can you relate the above fact to the classification of elements?
What qualities are exhibited by Reshma?
2. Dobereiner arranged the elements in the order of increasing atomic masses in a triad. The
arrangement was later modified by Mendeleev and finally other scientists accepted his ideas.
Many other similar examples can be observed where original contribution happily accepts
modification in their ideas.
Answer the following questions:
i) What scientific values can be associated with the above anecdotes?
ii) Give an example from your life experiences so far that reflects display at such values
by you.
3. In a department store we see soaps are kept at one place while biscuits are kept together
elsewhere. Similarly scientists made several attempts to classify elements according to their
properties and obtained an orderly arrangement our of Chaos’
i) Why do we need to classify elements?
ii) Mention two values depicted by the scientists while making an attempt to classify
elements?
LIGHTS – REFLECTION AND REFRACTION
1. Some students went on excursion to a water theme park. They wanted to bathe in the
swimming pool. The teacher warned them about the depth of the pool. The students replied
that the pool appeared shallow. The teacher told them that due to refraction it appeared that
the pool bed is raised (All that glitters are not gold).
I)What is refraction of light?
ii) What values is the teacher exhibiting?
2. Mohit was watching a program on the topic MOON on the Discovery channel. He came to
know from the observations recorded from the surface of Moon that the sky appears dark from
there. He got surprised and wanted to know the reason behind it. He discussed it with his
friends, and they had the reasons as 1. Phenomenon of refraction of light 2.Phenomenon of
scattering of light and explained the topic to him in detail.
i) What is atmospheric refraction?
ii) Why does the sky appear dark?
iii)
What values were displayed by his friends.
3.A detective is tracking some criminals. He finds a clue to their whereabouts on a piece of
paper. On the paper is written
He tries to decode it but is unsuccessful. Suddenly it strikes him and he takes a mirror . He
places the mirror in front of the paper and voila he decodes the clue – “meet me at midnight”.
i)
ii)
iii)
What value are being promoted by the detective?
Mention some places where such mirror images are used on a daily basis? Why is it
done so?
Write STOP as it should be written on the front of a police car.
4. Deepika carried out an experiment to study a glass prism that splits colour of white light
passing through it and does not produce any colour by itself. She obtained absurd results. She
reported the result as such and discussed the matter with the teacher to find out the reasons
for wrong observation .
i)
ii)
iii)
What values are being promoted by Deepika?
Deepika obtained seven colours when she passed light through a prism. Where
can this phenomenon seen in the environment? How does this happen in the
absence of a prism?
What is this phenomenon of splitting of light called.
HUMAN EYE AND COLOURFUL WORLD
1.Sania and Shreya are best friends and study in class X. Recently Sania has been facing
difficulty in reading the black board text from the last desk. Shreya is little uncomfortable
and wonders why Sania avoids sitting on the last desk. On observation she found that Sania
often carries junk food in her lunch. Shreya has started sharing her lunch –full of green
vegetables and fruits with her. Sania is now better and also stated taking a balanced diet.
i) Name the eye defect Sania is suffering from?.
ii) What are the two possible deformities related to her eye defect?.
iii)What value is shown by Shreya?
2. A teacher observed that more number of children are using spectacles in a class. She advised
them about their dietary habits and some correct practices to be followed
i)Name the eye defect commonly found in children
ii)What are the major causes for their defect?
iii) What values are exhibited by the teacher?
3. A person looking at a person wearing a shirt with a pattern comprising Vertical and
Horizontal lines is able to see vertical lines more distinctly than the horizontal ones. He shares
his problem with his Friend who suggests him to go to a doctor immediately.
(i) Name the defect?
(ii) What is this defect due to?
(iii) How is such a defect of be corrected?
iv)What value does his friend display.
4. Aditya participated in a group discussion in his school on “Human eye and its defects” in the
evening he noticed that his father is reading a book by placing it at a distance of 50 cm or
more from his eye. He advised him for his eye check-up.
i)Suggest the focal length/power of the reading spectacle for him, so that he may easily
read the
book +placed at 25 cm from eye.
ii)Name the value displayed by Aditya
5. A boy was found to be reading in the running bus. Ram advised him not do so.
i) What defect is be likely to develop
ii)Write two of its causes .
iii)What values is Ram exhibiting
HEREDITY AND EVOLUTION
1. Aditya participated in a group discussion in his school on “Human eye and its defects” in
the evening he noticed that his father is reading a book by placing it at a distance of 50
cm or more from his eye. He advised him for his eye check-up.
i)Suggest the focal length/power of the reading spectacle for him, so that he may
easily read thebook +placed at 25 cm from eye.
ii)Name the value displayed by Aditya
2. In a quarry of sandstone,a digger found some bones below the rocks.He took them out
and was about to throw them away when his fellow digger told him that this could be a
fossil and they should hand it over to the museum.
i)Which values are promoted by the fellow digger?
ii)What contribution are the digger making to the scientific world?
iii)What is a fossil?
3. Aliya and Sarita are working in the same firm. One day during a casual talk Aliya told
that her sister is tortured by her in-laws for giving birth to a girl baby. They are telling
that Aliyas sister is responsible for the birth of a baby girl and abuses her now .
I)
With your knowledge of genetics ,do you think Aliya’s sister is responsible for the
birth of a girl ?
II)
As a student how will you able to create an awareness that girls are equally
important in the society like boys .
4. Adithya saw a poster in the school : survival of the fittest”.
i)
Who put forward this theory?
ii)
What values can you imbibe from this theory in your life ?