Tuesday, April 30, 2013

8th Science Power -Conservation of Plants and animals [Questions with solution]

Formative and Summative assessments 8th Science Power
Topic For Group discussion:
Q. Saving paper helps to conserve our natural resources.
Organize a seminar on the topic: Flora and fauna and its diversity.
Prepare a project report on the wild life which has reached on the verged of extinct.
General Questions:
1. Define these terms:
a. Flora:
The plants found in a particular area is called flora of that area
b. Wild life sanctuary
Wildlife sanctuaries is protected area reserved for wild animals, birds and plants
c. Biosphere reserve
The protected area in which multiple use of land is permitted to conserve biodiversity.
d. Fauna
The animals found in a particular area are called fauna of that area.
2. Differentiate between the following:
a. Endangered and Extinct species
b. Endemic and exotic species
3. Answer these Questions:
a. What is red Data book?
Answer: Red data book contain a record of all those species of plants and animal which are under the threat of extinction or are rare and vulnerable for extinction.
b. Define deforestation and Afforestation and Give consequences of deforestation?
Answer: Deforestation is the practice of cutting down of trees whereas the practice of planting more trees is called Afforestation.
Following are the consequences of deforestation:
a. Global warming      b. Climatic change         c. Desertification    d. Drought and flood
e. Soil erosion and loss of wild life
c. Mention the effect of deforestation on environments, wild animal and soil?
Answer: The effect of deforestation on environments: Deforestation increases the temperature and wind speed which causes global warming.
d. Why is tiger an endangered species?
Answer: Tiger is an endangered species because tiger will soon became extinct if the same causative factors continue.
e. What are the major threats to wild life?
Answer: Following are the major threats to wild life:
(i) Habitat loss (ii) Indiscriminate killing and poaching (iii) pollution of air water and soil pollution
f. Why biosphere reserve the best way of wild life conservation?
Answer: This is because biosphere reserves not only help in maintaining the biodiversity but also create awareness to maintain culture of that area.  
g. Human population is a threat to biodiversity? Justify?
Answer: Human population is a threat to biodiversity because more and more land of forest is cleared to fulfill the needed of growing population.
h. List major steps taken by government to conserve biodiversity in India?
Answer: Following are the major steps taken by government to conserve biodiversity in India:
(i) Creation of protected area like park sanctuaries and biosphere reserve
(ii) Making strict low to prevent poaching
(iii) Making captivity for breading
(iv) Starting project to save endangered animals
i. Write notes on (i) project tiger (ii) Gir lion project
Answer:
 (i) Project Tiger: Project tiger is a program launched by government that saves tiger from poaching by making 23 tiger reserve.
(ii) Gir lion project :  Gir lion project started by Gujarat government in 1972 to protect Asian lion.
j. What does IUCN Stands for?
Answer: IUCN Stands for The international Union for Conserve of Nature and Natural Resources.
k. What do you know about Chipko movement?
Answer: Chipko movement is started by Sundar Lal Bahuguna in Uttarakhand to save tree.  The women of village embraced the tree and protest cutting of tree.

Hots Questions:

1. Why rainfall reduced in Cherrapunji which once had the highest rain fall?
Answer: Rainfall in Cherrapunji greatly reduced by loss of forest cover to create space for growing population and for cement industries.
 2. How does over grazing lead to desertification?
Answer: over grazing reduce the grass cover of land and expose the soil to the atmospheric air. The Soil dries up and its humus layer is lost which slowly changed grass land into desert.
Q. Give any two examples of the endemic flora of Pachmarhi Biosphere reserve.
Answer.  Sal and wild mango.
Q. Why is species of some animal become endangered?
Answer. Some species of animal become endangered, because of the disturbances in their natural habitat.
Q. Why migratory birds migrated from one place 'to another?
Answer. Migratory birds migrate to overcome climatic changes. For example, Surkhab migrated from Malaysia.
8th  Conservation of Plants and Animals 

Conservation of Plants and Animals Download File

Check point[Formative Assessment] Download File

8th Conservation of Plants and Animals[Questions with Solution]

8th Conservation of Plants and animals : Science power Book for class 8th

8th Conservation of Plants and animals -Formative Assessment- Oral Questions - Fill in the blanks - Match the Columns - Think Zone – Puzzle /Quiz –and many more Download/Read
8th Science Power Solution - Conservation of Plants and animals Download/Read

Sunday, April 28, 2013

CBSE PHYSICS IX Motion And Rest Formative Check Points for FA-01

CBSE PHYSICS: IX Motion And Rest Formative Check Points For FA-01..:
Q. Define terms (i) One radian (ii)  Angular displacement (iii) Angular velocity

Answer: One radian is defined as the angle subtended at the centre of the circle by an arc equal in length to its radius.
Angular displacement : In a circular motion, the angular displacement of a body is the angle subtended by the body at the centre in a given interval of time. It is represented by the symbol q (theta).                              
Angular velocity : The angular displacement per unit time is called the angular velocity. it is represented by the symbol w(omega).
Angular velocity w = q/t
In figure, the arc AB of the circle has length  and subtends an angle q at the centre C
Click on given link to read full post: Check Points For FA-01

Sunday, April 21, 2013

CBSE Introduces "OPEN BOOK EXAM"



The Central Board of Secondary Education (CBSE) is set to introduce an 'open book' section in the final exams for classes IX, X and XI from the current academic year and for class 12 boards from next year (2014-15).  By Open Book it is not meant that the books can be taken inside the examination hall and answers can be copied from it.
For the open book section, students will be given case studies in each subject four months in advance. All questions will be from the given material. This section will carry 20% weightage.
The proposed change, aimed at enhancing the quality of education, is likely to come into effect for the 2014 board exams. The pattern would be applicable for all subjects in Class 10 and for selected subjects for Class 12.
The open book section will begin for all subjects in classes IX and X but at the plus two level, CBSE has identified four subjects: Biology, Economics, Geography and a language.
The open book exam will be part of the Summative Assessment II for class IX and also for those students who opt for school-based class X exams under the Continuous and Comprehensive Evaluation ( CCE) scheme instead of the board exams. The modifed version is called ‘Pre Announced Test’ (PAT).
Cortesy: The Times of India

Friday, April 19, 2013

Formative Assessment - CBSE Class 7th Nutrition in plants and animals



 CBSE Class 7th Nutrition in plants and animals : Formative Assessment 

Q. What is food?


Answer: Food is fuel for living things.


Q.  Why we need to eat food?


Answer: Food is a basic need for all living things to live fit and active. It is because food provides energy to all living body to do their life activities. Food also helps to grow and build their bodies.


Q. What are nutrients?


Answer: Chemicals present in food that nourish body are called nutrients. They are Carbohydrates, Fats, protein, Vitamin, minerals, Water and roughage.


Q. What is nutrition?


Answer: The process of taking and utilization of food by the body is called nutrition.


Q. What are the different modes of nutrition?


Answer: Autotrophic, Heterotrophic, parasitic and Saprophytic nutrition.


Q. What are Autotrophic and Heterotrophic nutrition?


Answer: The mode of nutrition by which green plants utilize their own prepared food is called autotrophic nutrition.

The mode of nutrition by which non green plants and animals utilize food is called Heterotrophic nutrition.


Q. What is the name given to green substance present in leaves of plants?


Answer: Chlorophyll.


Q. What is the name given to small pores present in leaves?


Answer: Stomata through which air comes into the leaf.


Q. What is photosynthesis?


Answer: The process by which green plant prepare food using sunlight, CO2, Water mineral and nitrates is called  photosynthesis.

           6CO2 + 6H2 --->  C6H12O6   + 6O2

Q. Why is the sun called the ultimate source of energy for all forms of life?


Answer: Most living organism get the food prepared by plant using sunlight. In the absence of food, life would be impossible on earth. So, the sun is the ultimate source of energy for all forms of life.


Q. What are Saprophytes? How do they get their nutrients?


Answer: Non green plants that feed on dead and decay matter to get their nutrients is called Saprophytes and their mode of nutrition is called saprophytic nutrition. e. g. Mushroom, Bread mould.


Q. What are Insectivorous Plants? How do they get their nutrients?


Answer: Green plants that feed on insect to fulfill need of nitrogen are called Insectivorous Plants. For example venues fly trap and pitcher plant.


Q. Name a plant that has both autotrophic as well as heterotrophic mode of nutrition?


Answer: Pitcher plant


Q. Name the bacterium that converts atmospheric nitrogen into a soluble nitrate?


Answer: Rizobium.


Q. If the pitcher plant is green and carries out photosynthesis then why does it feed on insects?


Answer: Insectivorous Plants need to eat insects because their soil does not have certain nutrients like nitrogen for them to grow.



Q. What is symbiotic relationship?


Answer:   When two different types of organisms live together and mutually help each other for nutrition. They are said to live in symbiotic relationship.


Q. How fungus and alga fulfill their nourishment?


Answer: The algae are green enough to prepare food but cannot absorb water and minerals. So algae supply food and shelter to fungi and fungi absorb water and minerals.


Q. Name the organisms that consist of a fungus and alga.


Answer: Lichens


Q. How can you justify that humans and animals are directly or indirectly dependent on plants?


Answer: Plants can prepare their food themselves but animals including humans cannot. They get it from plants or animals that eat plants. Thus, humans and animals are directly or indirectly dependent on plants.


Q. why our body cannot make food from carbon dioxide, water and minerals like plants do?


Answer: It is so because we do not have chloroplasts that contain the green pigment called chlorophyll.


Q. Why are leaves called the food factories of plants?


Answer: This is because the synthesis of food in plants occurs in leaves.


Q. Why all living organisms require food?


Answer: All living organisms require food to keep healthy and fit and active.


Q. What is the stored form of carbohydrates in plants?


Answer: Starch


Q. .Why in the rainy season does a loaf of bread turn blue, brown or greenish?


Answer: Due to growth of fungi


Q. Proteins are nitrogenous substances which contain nitrogen. (T/F)


Answer: True


Q. How are nutrients replenished in the soil?


Answer: Nutrients are replenished in the soil by growing leguminous plant which shelter Rizobium bacteria that convert atmospheric nitrogen into nitrate and make soil fertile.


Q. Why Cuscuta is called total parasite?


Answer: Cuscuta is called total parasite as it fully depends on green plants for food. It sucks food through haustoria (parasitic roots).


Q. Why mistletoe is called partial parasite?


Answer: Mistletoe is called partial parasite as it depends on host plant only to get mineral and water but prepare own food.


Q. Name the components of food other than carbohydrates synthesized by Plants?


Answer: proteins and fats by using nitrogen.


Q. How water and minerals absorbed by roots reach the leaves.


Answer: In plants water and minerals absorbed by roots hair and reach to leaves through transporting tissue xylem.


Q. What is osmosis?


Answer: The movement of water from high concentration to low concentration through semi permeable membrane is called osmosis.


Q. What is ascent of sap?


Answer: The force by which water forced upward to ward leaves is called ascent of sap.


Q. Leaves of certain variety of cabbage are purple in colour. Are they able to do photosynthesis? Give a suitable reason?


Answer: This is because the large amount of red, brown and other pigments color contain the green colour


Q. Why do we get instant energy from glucose?


Answer: This is because Glucose is the simplest carbohydrate which is instantly absorbed in the blood stream and supplies energy.

For more click links given below:

Obtaining and Utilization Food Class 7 Science Solved question (Basic Science Questions answers)

Sunday, April 7, 2013

8th Crops Production and Management Check point [Formative]

Book Reading Science Power class 8th SRIJAN publications

Check point -01[Formative]
Q. Why cotton or rice cannot be grown in winter or wheat in rainy seasons?

Answer:  Cotton or rice cannot be grown in winter as they require lot of water where as  wheat cannot be grown in rainy seasons as they need much less rain and low temperature.
Q. Name the main cereal crops grown in India?

Answer: Rice, wheat, maize etc. are the main cereal crops grown in India.

Q. Name the crops seasons in India .Why do we have different crops seasons?

Answer: Rainy season(Kharif crops) and winter season (Rabi crops)are two main crops seasons in India. We have different crops seasons as different crops required different climatic conditions like temperature, humidity and rainfall.

Q. Give reason why Kharif crops cannot be grown in Rabi season?

Answer: Kharif crops cannot be grown in Rabi season because they need lot of water.

Q. Name three crops plants grown in Kharif seasons.

Answer: Paddy, maize, bajra.

Q. What are the important aspects of getting a bumper crops?

Answer: Following are the important aspects of getting a bumper crops:
 (i) Preparation of soil                 
 (ii) selection and sowing seeds    (iii) Adding manure and fertilizers
(iv) Irrigation                               (v) Protecting from weeds, pets and diseases 
(VI) Harvesting                          (vii) Storage

Q. Give two advantage of plowing field?

Answer: The two advantage of plowing field are:
 (i) to allow the roots to penetrate deep into the soil
(ii) To increase the growth of earthworms and microbes in soil

Q. Why is leveling essential?

Answer: leveling essential 
(i) to prevent the loss of moisture from ploughed field   
(ii) to prevent water logging in field (iii) to prevent loss of the upper layer of soil

Check point -02[Formative]

Q. Why we need to keep proper distance between seeds?

Answer: This help to get enough sunlight, water and nutrients by preventing overcrowding in field.

Q. Name the three steps involve in soil preparation.

Answer: The three steps involve in soil preparation are ploughing, levelling and manuring.

Q. Name the medium in which plants grow.

Answer: Soil is the medium in which plants grow.

Q. Why is ploughing is essential. Give two reasons?

Answer: Ploughing is essential for turning and loosening the soil and increase water holding capacity.

Q. Sowing with seed drill is better. Give two reasons?

Answer: Seed drill sows the seeds uniformly at proper distances and depths. It ensures that seeds get covered by the soil after sowing. A seed drill also saves time and labor.

Q. What is transplantation?

Answer: The practice of transferring seedling from nursery to main field is called transplantation.

Check point -03[Formative]

Q. Name the two fertilizers containing nitrogen and other containing phosphorous?

Answer: The two fertilizers containing nitrogen are urea(CH4N2O) and ammonium sulphate [(NH4)2SO4] and The two fertilizers containing phosphorous are ammonium hydrogen  Phosphate  and ammonium Phosphate [(NH4)2HPO4]

Q. How is compost prepared?

Answer: compost is prepared from the decomposition of vegetable waste, farm and kitchen waste by the action of soil bacteria.

Q. What are bio fertilizers?

Answer: A biofertilizer is a substance which contains living microorganisms like Azobacter and micorrhiza.

Q. What is the use of field fallowing?

Answer: fallowing means leaving field to rest for a season this helps to improve soil fertility.

Q. Explain the significance of crop rotation or mixed cropping?

Answer: The practice of growing different crops alternately in a field is called crop rotation like pulses that are grown between two cereals. The practice of growing two or more types of crops in the field is called mixed cropping. These help in the replenishment of the soil with nutrients.

Check point -04[Formative]

Q. Why fields need to be irrigated before sowing seeds?

Answer: To maintain moisture in soil for seed germination

Q. Why should seeds be shown in moist soil?

Answer: Moist soil helps in proper germination and growth of seeds.

Q. Why drip irrigation is better than other method of irrigation?

Answer: This is because, in drip system, the water falls drop by drop just at the position of the roots and there is no wastage of water. It is a boon in the regions where availability of water is poor.

Q. Why excessive irrigation harmful to the crops?

Answer: Excessive irrigation cuts off oxygen supply to roots of plants that prevent proper growth of plants. Excessive irrigation also increase amount of salt in soil that reduces fertility of soil.

Check point -05[Formative]

Q. What are weeds? How do they effect crops?

Answer: The undesirable plants that grown naturally along with the crop in a field are called weeds. For example: Amaranthus, Wild Oat (javi), Chenopodium (bathua). Weeds compete with the crop plants for water, nutrients, space and light. Thus, they affect the growth of the crop.

Q. Give one difference and one similarity between weedicides and insecticides?

Answer: weedicides kill weeds where as insecticides kill insects. Both weedicides and insecticides are sprayed standing crops before flowering and fruiting.

Q. Differentiate between insecticides and pesticides?

Answer: insecticides kill insects where as pesticides kill pests and their eggs.

Q. Name the methods used for pest eradication.

Answer: By chemical control and by biological control

Q. What are the harmful effects of using insecticides or pesticides?

Answer: Insecticides and pesticides contain very harmful chemicals which cause harmful effect on human health, pollute soil and water and also kill useful insects.

Q. What is organic farming? Why should we opt for it?

Answer: The method of farming in which organic manure and biological methods for controlling pets are used is called organic farming.  We opt for it to reduce effect of chemical fertilizer on the soil.

 Check point -06[Formative]

Q. How is cross breading carried out in plants?

Answer: At first anthers are removed [Emasculation] from one plant and pollen grain of another flower are transferred to stigma of first flower and covered with plastic bag till seeds formed.

Q. What is harvesting?

Answer:  The cutting and gathering of crops after it is matured is called harvesting.

Q. Give the name of two crops harvested manually.

Answer: Rice and wheat

Q. Name the machine used for both harvesting and threshing.

Answer: combine

Q. Name the process of separating grain from harvested crops.

Answer: Thressing

Q. Why is threshing essential?

Answer: This is because threshing separates grain and husk from harvested crops.

Q. What do you mean by green revolution?

Answer: The combined efforts that result in increase in food production by using new techniques that made our country self sufficient in food grain production is called green revolution.

Q. Name the scientist whose efforts resulted in the success of green revolution.

Answer: M.S. Swaminathan

For more study material visit: http://jsuniltutorial.weebly.com/

Friday, April 5, 2013

Central public school,Samastipur

School Details By Jsunil[Maths and Science Teacher]
Visit:  http://www.centralpublicschool.net

School Motto:  "Excellence through Self-motivation"
We believe in hard work. This is a fast changing and highly competitive world and we reckon that only self-motivation can keep us focused and good education combined with hard work can help us achieve our goals.

School Name : CENTRAL PUBLIC SCHOOL
Principal: MR. MD. ARIF 
Day or Residential: DAY

Available Classes: 12

Medium: ENGLISH

Type: CO-ED

Board of Education: CBSE

Address : TAJPUR ROAD , SAMASTIPUR-848101

BIHAR ; Phone 6274 - 222970

For study material prepare by Jsunil you may Visit: http://jsuniltutorial.weebly.com/

CBSE _NCERT Class X Unit 1, THE TRIBUTE Textbook Exercise Questions

CBSE - Class X, Literature Reader for English (Communicative)
Unit 1, THE TRIBUTE
Textbook Exercise Questions
Q.3: The narrator of the story is a man called Babuli. Answer these questions briefly:
(a) Why did Babuli have to visit his family village?
(b) Why had he not been to his village for a long time?
(c) When Babuli told his wife that the family land had to be divided, how did she react?
(d) When Babuli arrived at the family home, what changes did he notice? What was the 
reason for these changes?  
(e) Who wanted to buy Babuli’s share of family lands?
(f) What did Babuli do with his share?
Ans:
(a) There was a quarrel between Babuli’s two sisters-in-law. His elder brother had written a letter, asking him to come home, because all movable and unmovable ancestral property was to be divided up among Babuli and his two brothers. Because of this Babuli had to visit his village as his presence on this occasion was indispensable.
(b) Babuli had not been to his village for a long time because he was too busy with his life and work in the city.
(c) When Babuli told his wife that the family land had to be divided she was totally unperturbed. She just asked him “When?” as if she was all prepared and waiting for this event to take place. Then she became greedy as she wanted Babuli to sell the land and hand over the entire money to her.
(d) When Babuli arrived at the family home, he was not welcomed as he used to be. In the entire house there was an unusual quietness. It was as if the entire house was preparing for a collapse.
The reason for these changes was the demand for partition by the second brother and his wife. This resulted into the quarrels between the two sisters-in-law of Babuli and disagreements within the family.
(e) Babuli’s second brother wanted to buy his share of the family lands.
(f) Babuli gave his share to his elder brother. 
Q.4: Do the following extracts contain a metaphor or a simile? For each, explain its meaning.
(a) A lot of cobwebs have settled around me. (paragraph 2)
(b) I listened to all this like an innocent lamb looking into the darkness. (10)
(c) The past was sprouting up in me. The childhood days and the days now! Time has coagulated for me. (20)
(d) We moved from boundary to boundary. Everywhere I could feel the imprints of his feet, his palm and his fingers. On the bosom of the paddy fields sparkled the pearls of my elder brother’s sweat. (34)
Ans:
(a) This extract contains a metaphor. The comparison is between cobwebs and Babuli’s neglect of his family. It is just like the neglected portion of a house which gets covered by dust and cobwebs, Babuli’s ties with his family had become covered with the dust and cobwebs of neglect. His preoccupation with his life in the city caused him to overlook his mother, his elder brother, and his past.
(b) This extract contains a simile. The sadness and the fear at the impending division of his home and ancestral properties as well as his wife’s plan to use the money gained from this division made Babuli feel as if he were a helpless lamb about to be killed and torn into pieces by the butcher.
(c) This extract contains two metaphors. Babuli compares his memories to sprouting seeds. The memories of his life in his village rise up within him just like seedlings that rise up from the ground during germination. He feels that time has become standstill. The overall change shows two contrasting views of time: ‘time’ that is in motion and ‘time’ that has become standstill.
(d) This extract contains two metaphors. Babuli compares the paddy fields with a human figure. The fields are adorned by the results of his elder brother’s hard work. He compares the sweat drops of his elder brother with pearls. The implication is that the sweat drops are as precious as pearls. The overall image is that of a human figure wearing a necklace.
Q.6: (a) Babuli’s elder brother used to say to his wife:
“You must make the dish as delicious as possible, using mustard paste for Babuli.”
What are Babuli’s feelings for his brother, as he remembers these words?
(b) “I shivered with the cold, and my own ingratitude,” says Babuli. 
     Quote two instances from the story which shows his ingratitude.
(c) “Brother …you are my land from where I could harvest everything in life,” says Babuli.
What are land and harvest compared to by Babuli? What does he wish to convey to his elder brother, through these words?
Ans:
(a) Babuli feels love, gratitude and affection.
(b) The instances that shows Babuli’s ingratitude are -
(i) When Babuli got down from the bus, he forgot to touch his elder brother’s feet.
(ii) For the last two years in Bhubaneswar, Babuli never thought of home nor even tried to know the well-being of his family by writing a letter.
(iii) After he started a comfortable income, it never occurred to him that he should buy some winter clothes for his elder brother.      
(c) Babuli means that his elder brother’s love is the “land” from which he has “harvested” his success. Babuli wishes to say how grateful he is to his elder brother.
Q.8: Write an additional paragraph at the end of the story, starting:
When at last I reached home, my wife was waiting for me. Her hand was outstretched, and her eyes were gleaming with anticipation.   
Ans: When at last I reached home, my wife was waiting for me. Her hand was outstretched, and her eyes were gleaming with anticipation. On seeing her, once the feeling of satisfaction which had been there in my heart since I left the village, vanished. For the first time I questioned my decision. But then the memories of my childhood, elder brother’s image, his toiling in the fields, the sacrifices which the elder brother and his wife made for me etc. came to my mind and I felt I had done what was right.
After I went inside, sitting on the sofa I narrated the proceedings of the partition to my wife. When she heard of the second brother’s offer, she said, “So, what did you do?” I said her, “I did not sell my share. I have given it to my elder brother as a small tribute.” 
She was silent for a minute and I could see a hint of irritation in her eyes too. But very soon she could reconcile with me as she told, “Ok, you have done the right thing. The fridge and the scooter etc. can be purchased later also.” Saying this she went into the kitchen.      
Sample Questions on this Chapter[The Tribute]
Q.1: Give two incidents from the lesson ‘The Tribute’ to show that Babuli regretted being ungrateful to his brother.
Q.2: “I shivered with cold, and my own ingratitude” says Babuli. Quote two instances from the story which reveals his ingratitude.
Q.3: “He stopped for a moment near the pile of things and unfastened the strap of his wrist-watch and placed it on the heap with the other things.”
(a) Why did the elder brother do so? How did he feel?
(b) Mention any four traits of the elder brother that you get to know from the story.
Q.4: Do you think the title of the story “The Tribute” is appropriate? Why or why not?
Q.5: What impression do you get about the elder brother after reading the story ‘The Tribute’?
Q.6: “I can’t understand how a stranger could all of a sudden become so intimate, only sharing a little warmth by giving a silent promise of keeping close.” Who is Babuli referring to here and why so?
Q.7: Imagine you are Babuli’s elder brother. The partition has taken place and you received Babuli’s note that reads:
Brother,
What shall I do with the lands? You are my land from where I could harvest everything in life. I need nothing save you. Accept this please. If you deny, I shall never show my face to you again.
Babuli.
Overwhelmed with emotions answer here as you write a letter to Babuli.