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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.
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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 Home Work
: VIII :
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2. - I
3. - I
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, , , , , , , , , , ,
7. I
, , , , , , , , , , ,
8. I
9. 50 I
10. , , 20-25 I
11. I
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12.
I
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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 Home Work
Grade: 8 Sujbect: Urdu
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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
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
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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.
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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
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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
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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
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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.
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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.
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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 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.
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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 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.
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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 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?
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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
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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?