ENGLISH GARDE:VIII - Dauha Al-Uloom International …dauhaschool.ac.in/assignments/Class VIII-STD.pdfENGLISH GARDE:VIII Activity 1: POSTER MAKING - Collect information on 'Diversity

DAUHA AL-ULOOM INTERNATIONAL SCHOOL CBSE Affiliation No.: 5730024 (License No. 254/S, Ministry of Education, K.S.A)

Jeddah: 21415 Tel: 02-6700492/6700495

HOLIDAY HOMEWORK 2018-2019

Class : 8 Subject: English

1. Write an essay on a poet.

Your essay should include the following:

a. Introduction b. Childhood c. Achievements d. Contribution to the society

Make your essay presentable and use pictures.

2. A. Write the format of a notice. B. Write the format of a formal letter

C. You are Neha/Nikhil of APH School. Write a letter in about 80-100

words to the principal of your school requesting him/her to arrange extra classes

for maths and science.

3. Write the eightparts of speech with examples.


Jeddah: 21415 Tel: 02-6700492/6700495

Holiday Home Work

: VIII :

1. - ?

2. - I

3. - I

4. - , I

5. I

6. I

, , , , , , , , , , ,

7. I

, , , , , , , , , , ,

8. I

9. 50 I

10. , , 20-25 I

11. I

12.

I


Jeddah: 21415 Tel: 02-6700492/6700495

Holiday Home Work

Grade: 8 Sujbect: Urdu


Jeddah: 21415 Tel: 02-6700492/6700495

HOLIDAY HOMEWORK 2018-2019

Grade: 8 Subject:biology

As part of your subject enrichment--- Collect and stick the pictures of micro

organisms which are useful in your daily life on an A4 size paper.

Revision Questions

Crop Production and Management

1. Weeds compete with crop plants for_____.

2. Soil can be loosened with the help of a :

3. Growing different types of crops in pre-planned succession is known as :

4. Give two examples of Kharif and Rabi crops.

5. What is weeding?

6. Why can roots of plants breathe easily in loose soil?

7. Why do Paddy crops grow in rainy season?

8. Describe methods of irrigation which conserve water.

9. Explain how Fertilizers are different from Manures?

10. Write short notes on

Weeding Threshing Preparation of Soil Sowing Affects on soil due to continuous plantation of crops in a field 11. Give one example of each

Weed Plant pest Organism used in biological control method Crop that has the natural ability to make soil fertile Usable form of nitrogen for plant growth.

Microorganisms - Friend and Foe

1. What are food preservatives? Name some common food preservatives.

2. Draw a systematic diagram of nitrogen cycle and explain it.

3. Explain the process of Pasteurization in brief.

4. Explain in detail how vaccination works?

5. What are good microorganisms? Explain some of the uses of good microorganisms.

6. Explain various types of bacteria.

7. What are food poisoning and food preservation (short notes)?

8. Explain the discovery of Penicillin.

9. What are antibiotics? Explain with the help of examples.

10. What are harmful microorganisms? Explain by giving the example of two disease carrying microbes.

11. What are the indications required to detect spoilage in food?

Synthetic Fibres and Plastics-Notes

Note

I. There are two types of fibres One is natural fibres which are obtained from natural sources e.g. Cotton, silk, wool and other is synthetic fibres which are man-made for example rayon, nylon, acrylic etc. II. A Synthetic Fibre is a chain of small units of chemical substance joined together. Many such single units

combine to form single unit called Polymer. Polymer means made of many units joined together.

III. Types of Synthetic Fibre

Rayon- Rayon is synthesized from wood pulp. Rayon resembles silk, so it is also known as artificial silk.

Rayon can be dyed in different colours and is much cheaper than silk.

Nylon- Nylon was first commercially synthesized fibre. Nylon is synthesized from coal, water and air.

Nylon is very strong and its fabric is like silk.

Polyester- Polyester, one of the most popular man-made fibres. It is made of repeating unit of a chemical

called ester. It is widely used to make clothes.

Acrylic- Acrylic is a man-made fibre. Acrylic is known as artificial wool or synthetic wool because it

resembles wool. Acrylic is cheaper than natural wool and can be dyed in various colour. This makes acrylic

is very popular among other fabrics.

IV. Characteristics of Synthetic Fibres

Synthetic fibres are cheaper than natural fibre.

Synthetic fibres are stronger than natural fibre.

Synthetic fibres are more durable than natural fibre.

Synthetic fabrics are dried up in less time.

Synthetic fibres are easy to maintain and wash.

V. Plastics

Plastic is a polymer that can be recycled, coloured, reused, mould or drawn into wires or various other

shapes. Units of some plastics have linear arrangement while some plastics are formed by the cross linked

arrangement of their units. Thus, plastic is used in making toys, suitcase, bags, cabinets, brush, chairs,

tables, and many other countless items. Polythene is one of the most famous types of plastic, which is used

in manufacturing of carry bags.

Types of Plastics

1. Thermoplastic: Plastics which can be easily bent or deform on heating are known as thermoplastic.

PVC and Polythene are the examples of thermoplastics.

2. Thermosetting plastic: Plastics which do not get deformed or softened on heating when mold once, are

called thermosetting plastics. Bakelite and melamine are the examples of thermosetting plastics.

Characteristics of Plastics Plastic is a poor conductor of heat and electricity.

Plastic does not react with air and water and with many of the chemicals.

Plastics are light weight, durable, cheap and very strong.

Plastics are non- biodegradable substances. It takes many years to get decomposed and sometimes does

not get decomposed at all. Thus plastic is not environment friendly.

Plastic does not rust.

Conservation of Plants and Animals

Facts that Matter

National parks, sanctuaries and biospheres reserves are maintained to conserve forests and wildlife. Deforestation and its causes: The variety of plants and animals existing on earth are essential for the well being and survival of mankind. Today a

major threat to survival of mankind is deforestation.

Deforestation means clearing of forests and using that land for other purposes, i.e. for industries set up or making

building for rehabitation. The causes of deforestation may be:

- Procuring land for cultivation. - Building houses and factories.

- Making furniture, using wood as fuel and

- Natural causes such forest fires and draughts.

Effects of deforestation: Deforestation causes increase of atmospheric temperature due to increase in concentration of carbon dioxide leading

to global warming.

Severe draughts and floods.

Deforestation changes the nature of soil, water holding capacity and soil erosion. Gradually, the fertile land gets

converted into deserts. It is called desertification.

Deforestation causes the destruction of habitat of wildlife, its survival becomes difficult.

Biosphere: The part of the earth in which living organisms exist or that supports life is known as biosphere. Biodiversity or Biological diversity: It refers to the variety or organisms existing on the earth. Their interrelationships and their relationship with the environment. It includes variety of plants, animals and microorganisms.

Flora and Fauna: The plants found in a particular area are termed as flora area. The animals found in a particular area are tamed as fauna of that area.

Endemic Species: Those species of plants arid animals which are found exclusively in a particular area are called endemic species to a zone, a state or a country. For example, sal and wild mango endemic flora of the Pachmarhi Biosphere

Reserve. Animals such as Bison, Indian giant squirrel and fly squirrel are endemic fauna of this area.

Species: A group of population or populations whose members have common characteristics and are capable of interbreeding among themselves to produce fertile off-springs. Normally, members of a species breed amongst themselves

and not with members of other species.

Biosphere Reserve:A larger protected area meant for conservation of biodiversity and culture of that area is called Biosphere Reserve. A biosphere may consists of other protected areas such as National Parks and Sanctuaries. For example,

Pachmarhi Biosphere Reserve consists of one National Park called Satpura and two Wildlife Sanctuaries known as Bori and

Ault marhi.

Wildlife Sanctuaries: These are the protected areas which provide protection and suitable living conditions to wild animals. Sanctuaries are places where killing (poaching) or capturing of animals is strictly prohibited.

A sanctuary may be a reserved natural area meant for the preservation and development of threatened/endangered

species. For example, there is the Kaziranga Wildlife Sanctuary for Rhinoceros in Assam.

National Park: A national park reserve is large and diverse enough to protect whole set of ecosystem. National Parks preserve flora, fauna, landscape and historic objects of an area. For example. In the Satpura National Park, Rock shelters

and Rock paintings are also preserved along with flora and fauna.

Comparison of a Sanctuary and a National Park:

Endangered Animals: Animals whose numbers are diminishing to a level that they might face extinction are known as the endangered animals. For example, dinosaurs became extinct a long time ago.

Ecosystem: All the living components, such as plants, animals and microorganisms and nonliving components such as climate, soil, river, deltas etc. constitute an ecosystem. An ecosystem can be as small as a pond or as big as an ocean or a

forest.

Red Data Book: The source book which keeps a record of all the endangered animals and plants. There are different Red Data Books.

Migration: The phenomenon of movement of a species from its own habitat to some other for a particular time period every year for a specific purpose like breeding is known as migration.

Reuse and recycling of paper save trees, energy and water. Reforestation is restocking of the destroyed forests by planting new trees.

A class test will be conducted on these topics after vacation.


Jeddah: 21415 Tel: 02-6700492/6700495

Holiday Home Work

Grade: 8 Subject : Physical Science

1. Tabulate the first 20 elements and their chemical symbols from the Periodic Table. Practice

and learn these 20 elements.

2. Write the list of all the chemical equations from Acids, Bases and Salts and Physical and

Chemical Changes . Also, specify the reactants and products for each of these equations.

3. In a table, record your body temperature for a week i.e. 7 days. Find the average of your

body temperature.


Jeddah: 21415 Tel: 02-6700492/6700495

Holiday Home Work

Grade : 8 Subject: Social

1.Write the information of about the Dams in India . ( At least 4

paragraph)

2. Project work on Constitution makers.

3. What are the changes that is taking place in the parliament Write information about it.


Jeddah: 21415 Tel: 02-6700492/6700495

Holiday Home Work

Grade: 8 Subject: Math

Rational Numbers

1. Find the multiplicative inverse of the following.

I. -11/12

II. -10/9

III.

IV.

V. 4 2. Solve the following

I.

II. + + 5 III. 10 IV. + 10 + +

3. The product of two rational number is 2 , if one of the rational number is 1/7 ,what is the

value of other?

4. To which number should ( ) be added to give ( )? 5. Verify the property XY = YX and compute it

X=7 and Y=1/2

Linear equations with one variable

6. Solve the equation and check your solution: x+x+ =5

7. Solve the equation and check your solution zz =

8. Meeras mother is four times as old as Meera.After five years,her mother will be three times as old as she will be then.What are their present ages?

9. The length of a rectangle exceeds its breadth by 4 cm. If length and breadth are each

increased by 3 cm, the area of the new rectangle will be 81 sq. cm more than that of the given

rectangle. Find the length and breadth of the given rectangle. Check your solution

10. A positive number is 5times another number.if 21 is added to both the numbers ,then one of

the new numbers becomes twice of another number.Find the original number

11. The sum of three consecutive multiples of 9 are 999.find the multiple

12. Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8.The final

result is 3times her original number.find the number

Understanding quadrilaterals

13. A quadrilateral has three acute angles,each measures 800 .what is the measure of the fourth

angle

14. The adjacent angles of parallelogram are (2x-4) and (3x-1),find the ,measure of all the angles

of parallelogram

15. In a quadrilateral ABCD, the measure of the two angles A= B and other two angles of the

quadrilateral are 110and 70 respectively. Find the measure of the angles A and B ?

16. Which of quadrilateral have their diagonals bisecting each other?

17. Which of quadrilateral have their diagonals perpendicular to each other?

18. Which of quadrilateral have equal diagonals?

Exponents And Powers

19. Solve the following equation and find the value of m in

I. 7m

= 343

II. 3m

=

20. Simplify

I.

II. (t0)

III. 6 = 2x-1

21. Simplify (a3

a

-2

a

4)-2

22. Evaluate (32)3

+ ( )0 + 3

5 (

)4 23. Find the value of

I. (243)2/5

II. (512)-2/9

24. Solve the following equation and find the value of m in 2m-3

=1

Data Handling

25. Make a circle graph to show the number of votes received in the election of class monitor

Mona -6 votes, Payal 10 votes ,Prasanth 20votes ,Rajen 15votes ,Subhash 3votes

26. A school bag has 3 science books,3social books ,1 maths book,2 language books. What is

the probability of getting a science book and social book?

Documents

ENGLISH GARDE:VIII - Dauha Al-Uloom International …dauhaschool.ac.in/assignments/Class VIII-STD.pdfENGLISH GARDE:VIII Activity 1: POSTER MAKING - Collect information on 'Diversity