Class-7 Social Science Geography Chapter-18 Natural Vegetation and Wild Life

 EVENTS CONVENT HIGH SCHOOL

20/01/2021                                    CLASS-7                                  SLOT-2

SOCIAL SCIENCE GEOGRAPHY

CHAPTER -18 NATURAL VEGETATION AND WILDLIFE

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D.      Answer the Following questions:-

Que-1 What are grasslands?

Ans-1 Area which have moderate to low rainfall support vegetation in the form of grass and not trees is called grasslands.

Que-2 Where are tropical grasslands found?

Ans-2 Tropical grass lands are dominant in northern Africa. They are also found in the Brazilian Plateau and Northern Australia.

Que-3 Why is commericla lumbering impossible in the tropical evergreen forest?

Ans-3 Commercial lumbering impossible in the tropical evergreen forest because in this forest mixed variety of hardwood and softwood trees are found on the plains while highlands have softwood coniferous trees.

 Que-4 Give a brief account of the tropical deciduous forests?

Ans-4 These forests are also known as mansoon forests.These are generally found in the monsoon regions of the world where rainfall is around 150cm and the range of temperature is around 20°-48°C. These forests are found widely spread over India.

       The trees are of medium height and shed their leaves in the dry season. There is a dense undergrowth of bushes and shrubs. Some of the important trees are teak, sal, sandalwood, shisham, bamboo, and eucalyptus.

Que-5 Explain in detail about the Mediterranean forests. Give example?

Ans-5 The Mediterranean type of forests are mostly found along the west and the southwest margins of the continents. The main area is around the Mediterranean sea in Europe, Africa and Asia.

DRAW A NATURAL VEGETATION CHART.

CLASS-8 SOCIAL STUDIES (CIVIC) Chapter-11 Economic Development

 EVENTS CONVENT HIGH SCHOOL

19/01/2021                         CLASS-8                                  SLOT-2

SOCIAL SCIENCE(CIVIC)

CHAPTER -11 ECONOMIC DEVELOPMENT

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A.Choose the most suitable alternative:

Question 1.In India the total percent of working people in agriculture is:
(a) 50 percent
(b) 60 percent
(c) 70 percent
(d) None of the above
Answer:
(b) 60 percent

Question 2.The total contribution of agriculture in. Indian G.D.P. is:
(a) 26 percent
(b) 36 percent
(c) 42 percent
(d) 100 percent
Answer:
(a) 26 percent

Question 3.The industrial development:
(a) lessens dependence on agriculture
(b) improves life style
(c) Both of the above
(d) None of the above
Answer:
(b) improves life style

B. Fill up the blanks:

1.      India, Nepal, China, Pakistan are developing countries and Japan, Singapore, Britain and U.S. are developed countries.

2.      The industrial development brings Prosperity for the country and citizens.

3.      The modern iron and steel plant was set up At Porto-nova in Tamil Nadu in 1830

4.      The cotton cloths from India are exported to prominent countries U.S., Britain, Russia, France, Eastern Countries of Europe

5.      The slow pace of economy increases Poverty.

 

C.Very Short Answer Type Questions

Question 1.What is poverty?
Answer:Poverty is the inability to secure minimum requirements of life, health and efficiency. One is unable to get minimum requirements for life such as food, clothing, housing, education and health due to poverty. Poverty leaves bad effect on the life and health of man.

Question 2.What is unemployment?
Answer:Unemployment is a situation in which people are willing to work for income but they are unable to find work.

Question 3.Which are mineral-based industries?
Answer:The industries based on raw material like iron, steel, cement, chemicals are called mineral-based industry.

 

D.Short Answer Type Questions

Question 1.How was our economy in ancient times?
Answer:In the ancient times Indian economy was rich and developed. India was independent in economy. The industry of pottery, metal, buildings were in advanced stage during the Indus Valley Civilization. In the medieval time Indian silk was in so high demand that Roman people were ready to give gold equal to the weight of Indian silk, Indian trade of cotton, silk, cotton clothes and spices was on the peak and our economy was rich in ancient times.

Question 2.What do you mean by small scale industry?
Answer:Cottage and small scale industries is the traditional industry as it needs little money and goods are made by the family members. The farmers when they have no work they earn money by this industry. These industries produce various traditional products like baskets, small toys, bides, ropes, envelopes, papad, mats, bade, spices and weaving items etc.

Question 3.What is sustainable agriculture?
Answer;Most of the farmers in India still use traditional tools for farming. They cannot make use of refined seeds, fertilizers and pesticides due to’poor economy and it also affects production. Their food production is consumed by their family members.

Question 4.Write the names of Cottage industries.
Answer:Some of the Cottage industries are:Small toys making,Carpet weaving,Papad making,Basket making,Bidi making,Rope making,Badi making,Mat weaving,Paper envelope making,Spices preparing etc.

Question 5.What is Gramin Rozgar Guarantee Programmer?
Answer:The Central Government has passed the “Gramin Rozgar Guarantee Yojna” Bill, 2005. Under this bill a provision has been made to provide to one adult person of every family a 100 days job in the periphery of 5 Km near his residence. This scheme will be in force in 600 districts of the country by 2010.

E.Long Answer Type Questions

Question 1.How agriculture is helpful in economic growth?
Answer:The whole country depends on agriculture for its food requirements. Through agriculture, we get cereals, vegetables and fruit; it also supplies raw materials to various industries. Many industries, in India, depend on agriculture for their raw material for example, jute, sugar, cotton, cotton textile. Good crops raise the farmer’s income. With increase of income, the farmers purchase various items of daily life manufactured in industry. Agriculture is the backbone of our economic growth.

Question 2.Describe the mineral-based industry.
Answer:Such industries based on raw material like iron, steel, cement, chemicals are called mineral-based industries. The first iron and steel plant was set up at Porto nova in Tamil Nadu in 1830. Modern Iron and Steel plant was set up in Jamshedpur in 1907. India has chemical industries under which fertilizers, artificial fibers, rubber, plastic goods, paints and medicines are made. Transport equipment like rail engine, motor cars, bus, truck, motorcycle, aeroplane and ships industries have been set up in India. These industries provide employments in large number to our people.

Class-9 Science Chapter-3 Atoms & Molecules

EVENTS CONVENT HIGH SCHOOL

19/01/2021                          CLASS-9                                  SLOT-2

SCIENCE

CHAPTER -3 (ATOMS & MOLECULES)

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Question 1. Hydrogen and oxygen combine in the ratio of 1 : 8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

Answer: Ratio of H : O by mass in water is:
Hydrogen : Oxygen —> H₂O
∴ 1 : 8 = 3 : x
x = 8 x 3
x = 24 g
∴ 24 g of oxygen gas would be required to react completely with 3 g of hydrogen gas.

Question 2. Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?
Answer: The postulate of Dalton’s atomic theory that is the result of the law of conservation of mass is—the relative number and kinds of atoms are constant in a given compound. Atoms cannot be created nor destroyed in a chemical reaction.

Question 3. Which postulate of Dalton’s atomic theory can explain the law of definite proportions?
Answer: The relative number and kinds of atoms are constant in a given compound.

Question 1. Define the atomic mass unit.
Answer: One atomic mass unit is equal to exactly one-twelfth (1/12th) the mass of one atom of carbon-12. The relative atomic masses of all elements have been found with respect to an atom of carbon-12.

Question 2. Why is it not possible to see an atom with naked eyes?
Answer: Atom is too small to be seen with naked eyes. It is measured in nanometres.
1 m = 109 nm

Question 1. Write down the formulae of
(i) Sodium oxide
(ii) Aluminium chloride
(iii) Sodium sulphide
(iv) Magnesium hydroxide
Answer: The formulae are

Question 2. What is meant by the term chemical formula?

Answer: The chemical formula of the compound is a symbolic representation of its composition, e.g., chemical formula of sodium chloride is NaCl.

Question 3. How many atoms are present in a
(i) H₂S molecule and
(ii) P0₄^3- ion?
Answer: (i) H₂S —> 3 atoms are present
(ii) P0₄^3- —> 5 atoms are present

Question 1. If one mole of carbon atoms weigh 12 grams, what is the mass (in grams) of 1 atom of carbon?
Answer:

Question 2. When 3.0 g of carbon is burnt in 8.00 g oxygen, 11.00 g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combination will govern your answer?

Answer: The reaction of burning of carbon in oxygen may be written as:

Question 3. What are poly atomic ions? Give examples.

Answer: The ions which contain more than one atoms (same kind or may be of different kind) and behave as a single unit are called polyatomic ions e.g., OH^–, SO₄^2-, CO₃^2-.

Question 4. Write the chemical formulae of the following:
(a) Magnesium chloride
(b) Calcium oxide
(c) Copper nitrate
(d) Aluminium chloride
(e) Calcium carbonate.
Answer: (a) Magnesium chloride
Symbol —> Mg Cl
Change —> +2 -1
Formula —> MgCl₂
(b) Calcium oxide
Symbol —> Ca O
Charge —> +2 -2
Formula —> CaO
(c) Copper nitrate
Symbol —> Cu NO
Change +2 -1
Formula -4 CU(N0₃)₂
(d) Aluminium chloride
Symbol —> Al Cl
Change —> +3 -1
Formula —> AlCl₃
(d) Calcium carbonate
Symbol —> Ca CO₃
Change —> +2 -2
Formula —> CaC0₃

Question 5. Give the names of the elements present in the following compounds:
(a) Quick lime
(b) Hydrogen bromide
(c) Baking powder
(d) Potassium sulphate.
Answer: (a) Quick lime —> Calcium oxide
Elements —> Calcium and oxygen
(b) Hydrogen bromide
Elements —> Hydrogen and bromine
(c) Baking powder —> Sodium hydrogen carbonate
Elements —> Sodium, hydrogen, carbon and oxygen
(d) Potassium sulphate
Elements —> Potassium, sulphur and oxygen

Question 6. Calculate the molar mass of the following substances.
(a) Ethyne, C₂H₂
(b) Sulphur molecule, S₈
(c) Phosphorus molecule, P₄ (Atomic mass of phosphorus = 31)
(d) Hydrochloric acid, HCl
(e) Nitric acid, HNO₃
Answer: The molar mass of the following: [Unit is ‘g’]
(a) Ethyne, C₂H₂ = 2 x 12 + 2 x 1 = 24 + 2 = 26 g
(b) Sulphur molecule, S₈ = 8 x 32 = 256 g
(c) Phosphorus molecule, P₄=4 x 31 = i24g
(d) Hydrochloric acid, HCl = 1 x 1 + 1 x 35.5 = 1 + 35.5 = 36.5 g
(e) Nitric acid, HN0₃ = 1 x 1 + 1 x 14 + 3 x 16 = 1 + 14 + 48 = 63 g

Question 7. What is the mass of
(a) 1 mole of nitrogen atoms?
(b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
(c) 10 moles of sodium sulphite (Na₂S0₃)?
Answer: (a) Mass of 1 mole of nitrogen atoms = 14 g
(b) 4 moles of aluminium atoms
Mass of 1 mole of aluminium atoms = 27 g
∴ Mass of 4 moles of aluminium atoms = 27 x 4 = 108 g
(c) 10 moles of sodium sulphite (Na₂SO₃)
Mass of 1 mole of Na₂SO₃ = 2 x 23 + 32 + 3 x 16 = 46 + 32 + 48 = 126 g
∴ Mass of 10 moles of Na₂SO₃ = 126 x 10 = 1260 g

Question 8. Convert into mole.
(a) 12 g of oxygen gas
(b) 20 g of water
(c) 22 g of Carbon dioxide.
Answer: (a) Given mass of oxygen gas = 12 g
Molar mass of oxygen gas (O₂) = 32 g
Mole of oxygen gas 12/32 = 0.375 mole
(b) Given mass of water = 20 g
Molar mass of water (H₂O) = (2 x 1) + 16 = 18 g
Mole of water = 20/18 = 1.12 mole
(c) Given mass of Carbon dioxide = 22 g
Molar mass of carbon dioxide (CO₂) = (1 x 12) + (2 x 16)
= 12 + 32 = 44 g
∴ Mole of carbon dioxide = 22/44 = 0.5 mole

Question 9. What is the mass of:
(a) 0.2 mole of oxygen atoms?
(b) 0.5 mole of water molecules?
Answer: (a) Mole of Oxygen atoms = 0.2 mole
Molar mass of oxygen atoms = 16 g
Mass of oxygen atoms = 16 x 0.2 = 3.2 g
(b) Mole of water molecule = 0.5 mole
Molar mass of water molecules = 2 x 1 + 16= 18 g .
Mass of H₂O = 18 x 0.5 = 9 g

Question 10. Calculate the number of molecules of sulphur (S₈) present in 16 g of solid sulphur.
Answer: Molar mass of S₈ sulphur = 256 g = 6.022 x 10²³ molecule
Given mass of sulphur = 16 g

Class-5 English Chapter-10 Fairest Of All

 

    19/01/2021                       CLASS-5                                  SLOT-2

ENGLISH

CHAPTER -10 FAIREST OF ALL

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New Words

1.     Princesss

2.    Fairest

3.    Ordered

4.    Gracious

5.    Afraid

6.    Returned

7.    Poisoned

8.    Hesitated

9.    Basket

10.  Laughed

11.    Married

12.  Stumbled

13.  Carrying

14.  Senseless

15.  Dwarfs

 

1.     Answer the questions:-

Que-1 Who was Snow-White?

Ans-1 Snow white was a princess.her skin was as white as snow. So her paerents named her snow white.

Que-2 What id the Queen order her servants to do?

Ans-2 Queen ordered one of her servants to take snow-white to the forest and kill her. But the servant couldn’t kill the innocent girl.

Que-3 Where did Snow white reach?

Ans-3 In the evening snow white found a small house on a hill side. The door was not locked as she entered the house.

Que-4 Who told the queen that snow white was alive?

Ans-4 Magic Mirror told the queen that snow white was alive.

Que-5 Who took the coffin?

Ans-5 King took the coffin.

Class-3 English Chapter-3 Could Not Stop Dancing

 EVENTS CONVENT HIGH SCHOOL

19/01/2021                            CLASS-3                                  SLOT-2

ENGLISH

CHAPTER -3 COULD NOT STOP DANCING
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New Words

1.     Matter

2.    Fiddlers

3.    Drummers

4.    Invited

5.    Ragged

6.    Passing

7.    Noise

8.    Music

9.    Minute

10.  Holding

11.   Burning

12.  High street

13.  Certainly

14.  Gradually

15.  Procession

 

A.  Answer the questions:-

Que-1 Who was Tom?

Ans-1 Tom was Fiddler.

Que-2 What did tom play on?

Ans-2 Tom play on Piper.

Que-3 What eatables were to be served at the Mayor’s party?

Ans-3 Ice-cream in buckets and a pink cake were served at the mayor’s party.

Que-4  Who was dancing when mayor came?

Ans-4 Policeman was dancing when mayor came.

Que-5 Why did the mayor invite tom to his party?

Ans-5 The mayor invite tom to his party because they play a piper.