Sunday, January 24, 2016

L- 5 THE SCIENCE OF CHANGE
Answer the following questions
Q1. ‘Things around us are changing continuously.’ Justify the given statement.
Q2. How will you identify a change?
Q3. What bring about changes? Give 2 – 2 examples for each.
Q4. Broadly classify changes into different categories.
Q5. Explain how physical and chemical changes are useful in your daily life.
Q6. Can physical and chemical change occur simultaneously? Give one example other then the example given in the textbook.
Q7. Give reason:
a)      Rusting of Iron is chemical change.
b)      When urea is added to water, the beaker becomes cool.
Q8. Fill in the blanks
a)      Gases such as Oxygen and nitrogen under_______________ and ______ conditions turn into liquids.
b)      Fossil fuels are formed by _________ change.
c)      When we add baking soda to vinegar, it results in release of _______________.
d)      ____________ are the changes where the original form cannot be restored.
Q9. Identify and write the type of change
a)      Blackening of silver ornaments. ____________________
b)      Melting of wax.__________________
c)      Rotation of Moon around the Earth.________________
d)      Breaking of glass bowl._______________
e)      Photosynthesis.____________
f)       Cooking of vegetables.________________
g)      Making car from blocks._______________.


Friday, January 22, 2016

Swiss family robinson chap10

Comprehension Questions:

1 What was the narrator’s first thought next morning?
Ans His first thought was to fetch the sledge from the wood
2 What was his motive for leaving it there?
Ans The narrator wanted to go a little further into the land and ascertain whether
 anything useful would present itself beyond the wall of rocks.
3 What did they find on their journey towards the sledge?
Ans They found a pretty grove whose branches were loaded with berries covered with
sticky wax.
4 How did the narrator find India rubber?
 Ans While they were busy picking berries another tree caught the narrator’s attention.
He noticed that the fruit it bore resembled the wild figs. The trunk of the tree oozed
gum which became immediately hardened by the air. Fritz collected some of it and as
they continued their journey, he pulled it like elastic. It quickly dawned upon the
narrator that it was in fact India rubber which would be very useful to them.
5 What made it almost impossible for them to proceed further?
Ans  The thick bushes of bamboo.
6 How did the narrator make candles?
Ans He put as many berries into the vessel as it would contain and set it on a moderate
 flame. His wife helped him make some wicks with the thread from the sail cloth.
 When they noticed the oily matter rise to the top, they skimmed it off and put it into a
Separate vessel. They continued this process till they had produced a considerable
quantity of wax. Then, they dipped the wicks one by one into it, and hung them on the
bushes to harden. They burnt one of the candles that evening and were very satisfied
with light it produced. 
7 What encouraged them to make butter?
Ans Their success making candles encouraged them to make butter
8 Why did the narrator want to construct a cart?
Ans As the sledge caused him much fatigue to load and draw.
9 Why did the narrator think of blowing up the wreck?
Ans The narrator think of blowing up the wreck so that the timbers themselves drifted

Ashore.

Wednesday, January 13, 2016

s.st notes-PASTORAL LIVING


1.       What are the other major occupations in the villages?
Animal husbandry, fishing and dairy development
2.       what is irrigated farming?
Crops are grown during the summer season with the Help of irrigation. This type of farming is known as irrigated farming.
3.       what is nabard? How does it help the farmers?
Nabard is the national bank for Agriculture and Rural Development. It grants monetary aid for agricultural activities.
4.      What are the other jobs except farming that people do in villages?
Poultry,rearing cows and goats, fishing, weaving, etc.
5.      What is animal husbandry?
Animal husbandry includes domestication of animals such as cows, buffaloes, goats, sheep, pigs, camels, horses, donkeys and yaks.
6.       Why are animals reared?
To obtain animal yields such as milk, meat, wool and skin.
7.      How do women play an important role in dairy development?
They care, feed and milk the animals. They work together with men and contribute to family earnings.
8.       What steps are taken by the government?
Steps are taken to boost women’s leadership skills, encourage savings and contribute to women’s empowerment. In some states, dairy cooperatives are formed with membership as well as the management entirely composed of women milk producers.
9.      Where is fishing carried out?
Fishing is carried on in rivers, lakes, seas, creeks and oceans
10.  How many marine fishing villages do we have in India?
3202
11.  What is the number of people involved in marine fishing?
There are 9 lakh people involved in active fishing
12.  List the fishing related occupations. (People are involved with
fishing related occupations such as net mending, marketing of fish, peeling, curing, and preservation and processing.
13. What is the number of people involved in fishing related activities?
14. 15 lakh
15. Where is Bastar situated ?
Bastar is situated in the state of Chhattisgarh
16. How many different tribes can we find in Bastar?
40 different tribes
17. What is Bastar known for?
I t is known for its vibrant tribal markets known as haats
18. What is Chapura?

Chapura, a chutney made from red ants and chilies, is the peculiar delicacy here. One can see people eating hundreds of live red ants given on a leaf

S.ST NOTES-INDIA AND THE WORLD

INDIA AND THE WORLD

EXTRA QUESTION/ANSWERS:

Q1. What do you know about Milinda?
Ans. The important ruler of the Bactrians was Menander, also known as Milinda. He extended his rule up to Mathura and made Sakala, present day Sialkot, his capital. He converted to Buddhism and his dialogues with the Buddhist monk Nagasena were recorded in the book, Milinda Panho or (Questions of Milinda).

Q2. Name the five different groups of Shakas.
Ans. There were five different groups of Shakas – one from Taxila; second in Punjab, third in Mathura, fourth in Western India and fifth in the Deccan.

Q3. Who was the famous Parthian king?
Ans. Gondophernes was the famous Parthian king.

Q4. Who were the first to use the term Hindustan?
Ans. The Sassanians, were the first to use the term Hindustan in their inscription in 226 CE.

Q5. How did Kanishka support Buddhism?
Ans. Mahayana Buddhism became popular during the reign of Kanishka.
-       He sent missionaries to Central Asia and China for propagation of Buddhism and built chaityas and viharas in different places.
-       He supported Buddhist scholars such as Vasumitra and Asvagosha.
-       The Fourth Buddhist Council in Kashmir was organized by Kanishka.

Q6. What was the Silk Road?
Ans. The Silk Road was a trade route that connected East Asia to the Mediterranean.

Q7. What goods were transported with the help of the Silk Road?
Ans. Silk, porcelain, furs, perfumes, spices, medicine, jewels, glassware, slaves, and horses

Q8. Which goods were imported to China?
Ans. Goods such as dates, saffron powder, pistachio nuts, frankincense, and myrrh, gold, silver and ivory were imported to China.

Q9. Name the Chinese pilgrims who came to India? Why did they come to India?
Ans. The Chinese pilgrims such as Hsuan Tsang, Fa-hsein and It-sing travelled from
China to India in search of Buddhist scriptures.

Q10. What does the book Kautilya informs us through his book Arthashastra?
Ans. Kautilya, in his book the Arthashastra informs us of the Board of Shipping and the
Commissioner of Port who supervised sea traffic. The Arthashastra has an entire
chapter on the state department of waterways under navadhyaksha. Shoreline
trade was carried out not only between different parts of India but also with
Eastern and Western world.

Q11. What information does Harivamsa gives us?
Ans. The Harivamsa informs that the first geographical survey of the world was performed during the period of Vaivasvata.

Q12. The Indians played a major part as middlemen between the Chinese and the
Romans. Explain.
Ans. The Chinese traded their silk with the Indians for precious stones, gold and silver and then the Indians would trade silk with the Romans.

Q13. What is the term “Greater India’ used to denote?
Ans. The term ‘Greater India’ is used to denote the historical spread of the culture of India beyond the Indian subcontinent.

Q14. How the cultural relationship between South East Asia and India can be
established?
Ans. The cultural relationship between South East Asia and India can be established through the transmission of ancient Vedic and Buddhist culture and philosophy into Myanmar, Thailand, Malaya, Laos and Cambodia. Indian scripts were found in South East Asian islands such as Sumatra, Java, Bali, South Sulawesi and parts of the Philippines.

Q15. What subjects were taught in the Nalanda University?
Ans. Various subjects such as theology, grammar, logic, astronomy, metaphysics and philosophy were taught here.

Q16. Name the Buddhist monk with whom Milinda discussed about Buddhism.
Ans. The Buddhist monk is Nagasena.

Q17. Name the book which shows a record of their dialogues.
Ans. Milinda Panho or (Questions of Milinda)

Q18. Who was the most important ruler of the Shakas? What did he issue in
Sanskrit?
Ans. The important ruler of the Shakas was Rudradaman I. He was a great patron of Sanskrit and issued the fi rst ever long inscription in Sanskrit.

Q19. Who visited during the reign of Gondophernes to propagate Christianity?
Ans. St. Thomas visited India to propagate Christianity.

Q20. Describe the empire of Kanishka.
Ans. The empire of Kanishka was a vast one extending from Gandhara in the west to Benares in the East and from Kashmir in the North to Malwa in the South. His capital was Purushapura or modern day Peshawar. Mathura was another important city in his empire.

Q21. State two reasons why the Silk Road was important.
Ans. It served as the primary path of commerce for the states from 200 BCE till the 14th century. It enabled people to transport goods such as silk, porcelain, furs, perfumes, spices, medicine, jewels, glassware, slaves, and horses.

Q22. Between whom was the Shoreline trade carried out?
Ans. Shoreline trade was carried out not only between different parts of India but also with Eastern and Western world.

Q23. Describe the Nalanda University
Ans. Nalanda University, the ancient seat of learning, was founded in the middle of fifth century CE. According to one account, there were 2,000 teachers and 10,000 students at Nalanda. Various subjects such as theology, grammar, logic, astronomy, metaphysics and philosophy were taught here.

The University was maintained by the revenue collected from the villages granted by the rulers of that period. Emperor Harshavardhana was one of its most famous patrons. Nalanda attracted many foreign students including Hsuan Tsang and It-sing from China. Hsuan Tsang had studied here and described the excellence of education system,
ascetic life practised as well as the ambiance and architecture of the university.



Monday, January 11, 2016

Grouping Materials

Q1. Define Material. and give few example.
Ans - Material is any thing made of matter, constituting one or more substances. Wood, cement, air, water and any other matter are all examples of materials.

Q2. Give reason - Grouping of material is important.
Ans - Organising or grouping things together makes our life simpler. It is easy to find things when they are properly arranged. Grouping various materials makes it easy to study them. Grouping help us to understand similarities and differences between various materials, hence grouping is important for us.

Q3. Describe properties of materials with examples, on basis of which they are classified.
Ans.

Properties of material
Description of properties
Example
1
State
a)Solid -  definite volume and shape
b)Liquid - definite volume but no shape
c)Gas - don't have definite volume and shape
a)    Wood, Glass, Metal, etc
b)    Water, Oil, Petrol, Milk, etc
c)    oxygen, air, CNG, Carbondioxide, etc
2
Appearance
i) Texture
ii) Lustre
Texture -
a) Smooth - plain and even surface
b) Rough - bumpy and uneven surface
Lusture -
a) Shiny - material with shiny surface
b) Dull - materials with rough or dull surface
Texture -
a)    Paper, glass, flower petals etc
b)    Wood, soil, rock, etc
Lustre -
a)    Metals, water, diamond, etc.
b)    Rubber, wood, etc.
3
Hardness
a)     Hard - materials which are not compressed easily.
b)    Soft - materials which are compressed easily
a)    Wood, Glass, Stone, Metals, etc
b) Sponge, cotton, wax, etc.
4
Solubilty
a)     Soluble - solid that dissolve in water
b)    Insoluble - solid that does not dissolve in water.
c)     Miscible - Liquid that dissolve in water
d)    Immiscible - Liquid that does not dissolve in water
a)    Salt, sugar, coffee powder, etc
b)    Soil, metals, wood, etc.
c)    Milk, vinegar, glycerine, etc
d)    oil, kerosene, petrol, etc.
5
Floatation
a)     Float - things lighter than the water.
b)    Sink - things heavier than the water
a)    Wood, wax, empty plastic bowl, etc
b)    metals, stone, rubber, etc
6
Transparency
a)     Opaque - things that does not allow light to pass through them
b)    Translucent - things that allow little light to pass through them
c)     Transparent - things that allow light to pass through them
a)    wood, metal, wall,  etc
b)    Paper, coloured glass, etc.
c)    air, glass, etc.

Q4. How do large ships made up of metal float on water?
Ans. Metal ship  has full of air filled in its walls, so the average density of the ship as a whole become less than the density of water. Therefore immersed portion of the ship displaces water to its equal weight. so the ship floats.

Q5. Why do we use metals such as iron and stainless steel to make locks?
Ans. It is because of properties of metals i.e strongness and durability, we use them to make locks.
Q 6. Fishes cannot come out of the water. How they survive without oxygen, which is present in gas form in the air? Give one more example to justify your answer.
Ans - Some gases such as oxygen and carbon dioxide can be dissolved in waster in small amounts. The oxygen dissolved in seawater is used by aquatic animals and plants for survival. The carbon dioxide gas dissolved in fizzy drinks is observed as bubbles.

Q7. Glass is a transparent substance. How can we see our reflection in the mirror, if the mirror is made up of glass?
Ans -Mirrors are manufactured by applying a reflective silver coating to glass, due to its transparency, ease of fabrication, rigidity, hardness, and ability to take a smooth finish. This silver coating make transparent glass reflective.

Q8. Give reason: CNG is portable and easy to use.
Ans - CNG ( Compressed Natural Gas) is compressed to 1% of its original volume and filled in cylinders in this compressed form making it easy to use and portable.

Q9.Materials show more than one property. here are some things given below, identify the original material from which they are made up of and write its properties. Write one thing of your choice.
Ans.

no.
Things
Materials used
Properties
1
Curtains
cloth (cotton, silk)
solid, soft, shiny, smooth, translucent
2
Boat
wood, iron nails
solid, float, rough, hard, opaque, dull
3
Cupboard
wood, metal
solid, hard, opaque, Shiny metal
4
Fanta (fizzy drink)
water, CO2, sugar
liquid, translucent, miscible
5
Mango shake
milk, mango pulp, sugar
liquid, opaque, smooth, miscible
6
?
?
?