Delhi Public School, Mahendragarh
Summer Holidays Homework 2017
Class-VIII
ENGLISH
General Instruction:
You have three tasks for your summer assignments. Read an English novel and write its
Review. You may include the following items. Write at least 100 words for each sub
titles.
(a)
Introduction of the author
(b)
The significance of the title
(c)
The Protagonist of the story
(d)
Language & style
(e)
Synopsis of the story
1. Write diary entries (daily basis) in a DIARY book from the first day of
your summer vacation till the last day in about 80 words each day.
2. Find four synonyms of each words given below from your thesaurus
1. Slender
2. Prohibit
3. Pathetic
4. Offend
5. Obstinate
6. Melancholy
7. Loathe
8. Abandon
9. Abundant
10.Amiable
11.Abrupt
12.Conceal
13.Cautious
14.Comprehend
15.Demonstrate
16.Disperse
17.Enormous
18.Fortunate
19.Intrinsic
20.Prejudice
21.Gloomy
22.Obscure
23.Scold
24.Intensive
25.Accept
26.Ascend
27.Assign
28.Conquer
29.Develop
30.Interfere
31.Receipt
32.Select
33.Anxious
34.Curious
35.Honest
36.Punctual
37.Adventure
38.Caution
39.Fame
40.Humor
41.Mystery
42.Science
43.Victory
44.Virtue
45.Memory
46.Haste
47.Etiquette
48.Bouquet
49.Weigh
50.Opportunity
PHYSICS
I Answer the following
1. Sound is produced by ________________ bodies.
2. In humans, the sound is produced by the ____________.
3. Sound always travels through a ___________. It cannot travel in a
____________.
4. The thin membrane called _____________ present in our ears, senses the
vibrations and sends them as signals to the _____________.
5. The no. of vibrations per second is called ______________. It is expressed in
_____________.
6. Loudness of sound is proportional to the square of the ____________
7. Larger is the amplitude of vibration, the __________ is the sound.
8. Higher the frequency of vibration, the higher is the ____________.
9. A bird makes ____________ sound whereas a lion makes ___________ sound.
(low pitched/high pitched)
10. For human ears, the range of audible frequency is from _____________Hz. to
______________ Hz.
11. Why are women advised not to wear high heeled shoes?
12. It is more difficult to pull boat on the beach than on the water?
13. How are you able to drink juice using a straw?
14. Why is the tip of sewing needle sharp?
15. Why are powder sprinkled on the carom board before playing?
16. Why does a woman apply soap solution on their hand to put on bangles?
17. Does the shoes having spikes on their sole help in making better grip on ice?
18. Will a match stick catch fire when it is rubbed against cemented wall?
19. What would happen if there is no friction?
20. Machine parts are oiled occasionally. Why?
II. Prepare a working model of your choice.
CHEMISTRY
1. Chapter : Synthetic Fibres and Plastics
1.
2.
3.
Give some examples of Natural and Synthetic fibres.
What are monomers and polymers? Give examples.
What is polymerisation? Show with a diagram.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
What is Rayon? Why is it not truly an artificial fibre? Why Rayon is also called
semisynthetic polymer?
Give some features and uses of Terylene and acrylic fibres which makes them
useful for us.
What are the advantages of synthetic fibres?
Write some disadvantages of synthetic fibres.
What are plastics? What are its different types?
Differentiate between Thermoplastics and Thermosetting plastics.
What are the characteristics of synthetic plastics?
Differentiate between biodegradable and non-biodegradable.
Give some measures to control the damage caused by plastic waste.
Name the first fully synthetic fibre. What are its different uses?
Should the handle and bristles of a tooth brush be made of the same
material? Explain your answer.
Explain why the following materials are made of thermosetting plastics –
(i) Saucepan handles (ii) Kitchenware (iii) protective coatings on wires.
(iv) bristles of combs (iv) Very strong ropes
(v) packaging material
Chapter: Metal and Non metal
2. Read the chapter Metals and non metals and answer the following questions.
1. Write differences between metals and non metals.
2. Define the following terms:
Sonorous, Malleable, Ductile
3. Why metals can act as good electron donors?
4. What do you means by Electronegativity?
5. Write the uses of metal in our lives.
6. What do you mean by Allotophes? Give example.
3. Make a model of MODERN PERIODIC TABLE. Highlight the metals non
metals and metalloids.
BIOLOGY
1)
Make a model/chart on various agricultural practices.
2)
Do a research and find out about kinds of crops grown on different soils, and
present them in the form of a beautiful chart with pictures.
3)
Using colourful clay/thermocol / charts etc. make a basic model of :
a)
Bacteria
b) Virus
4)
Practice and learn the definitions of all new words from chapters one and two.
5)
6)
Revise chapters: crop production and microorganisms thoroughly.
Complete the worksheet module [science; biology] : 12,13 and 14
SOCIAL SCIENCE
NOTE:- DO ALL THE WORK IN NOTEBOOK.
History
1.Prepare 8 multiple choice questions from lesson- 1
Geography
1.Prepare 5 multiple choice questions from lesson 1,2 ,3
2. Map Work do practice of Map River and dams and collect the picture of
some Indian national parks and wild life sanctuaries and paste them on
your scrap book.
Civics :-
1.Prepare 10 multiple choice questions from with answer lesson 1,2 a
2.Prepare the list of “THE FUNDAMENTAL RIGHTS in the Indian
constitution included”
3. Learn all the chapters covered upto May 2017.
SANSKRIT
प्रश्न-1
सॊधध के भेदों के 20-20 उदाहरण लऱखेंजैसे- विद्या + आऱय = विद्याऱय:
1. स्िर सॊधध
(दीघघ,गण
ु ,िवृ ि,यण ्,अयादद)
2. व्यॊजन सॊधध
3. विसगघ सॊधध
प्रश्न-2 उदाहरण दे खते हुए अन्य ककसी धातु से ऩाॉचों ऱकारों से (10-10)िाक्य रचना
करें - उदाहरण- ऩठ् - धातु के रुऩ
ऱट् ऱकार -- ितघमानकाऱ
स: ऩठतत।
ऱट्
ृ ऱकार -- भविष्यकाऱ
छात्र:ऩदठष्यतत ।
ऱङ् ऱकार -- भत
ू काऱ
छात्र: अऩठत ्।
ऱोट् ऱकार -- आऻाथघकाऱ
बाऱक:ऩठतु ।
विधधलऱङ् ऱकार--चादहए.इच्छा
ते ऩठे य:ु ।
प्रश्न-3.ऩस्
ु तकाधाररत(ऩाठ-1से5) तनम्न प्रत्यय यक्
ु त शब्द छाॉटकर लऱखें1.क्त्िा(करके)..........................
2.ल्यऩ ्(करके)...........................
3.शत(ृ करते हुए)........................
4.तुमन
ु ्(के लऱए)..........................
प्रश्न-4 ऩाठ्यक्रमाधाररत तीस अव्यय ऩद लऱखेंप्रश्न-5 सॊस्कृत के लशऺाप्रद श्ऱोकों को लऱखते हुए सधचत्र चाटघ बनाएॉप्रश्न-6 ऩाठ्यक्रमाधाररत 20 उऩसगघ यक्
ु त ऩद सोदाहरण लऱखेंप्रश्न-7 रूधचरा-ऩाठ 1 से 4तक के सभी प्रश्नोत्तर याद करें -
Do all the work in Sanskrit notebook.
HINDI
MATHEMATICS
1. Solve
a)
b)
c)
2. Use associative properties of rational numbers to solve
a)
b)
c)
c)
3. Solve the following using distributive property
a)
b)
c)
d)
4. Find multiplicative inverse of the followings
a) -12
5. Multiply
b) 44
c)-
with multiplicative inverse of
d)-77
.
6. Convert the following rational number into decimals
a)
b)
c)
d)
e) -9
7. Find 5 rational numbers between
and
8. Find multiplicative inverse of the followings
a)
14 -3
b) 194
)3
c)
d) -2—6
9. Simplify the following and write the answer in exponents form
a) 4-3 x 4-7
b) a-2 x t-2
c) 9-8 x c-8
d) 34x 38
10. Simplify :
a) ( 62 x 6 -4)3 6 -8 b) (30 x 4-1 ) x 2-3
c) (2-2)3 x ( 4-1 x 22)
d) 44 2-6
11. Find the value of m in the followings
a) 5-5 x 52m-1 ÷ 5 -3 = 25
b) 24 x 4 -3m = 1
c) 32 ÷ 27 3 = 81
d) 7m – 3 = 49 ÷ 7-3
12. Express the following into standard form :
a) 0.0000000012
b) 0.12122122
c) 0.0002324567
d) 10110101111111
e) 450045000450000
f) 1012121211000000
13. Add the followings :
a) 2.24242 x1015 + 42223.12 x 1015
b) 35.12 x 1017 + 35.12 x1015
c) 32222.12312 102 + 23.141 x 104
d) 45 x 10 -26 + 9 x 10 -25
14. Multiply the followings:
a) 2 x 1015 x 24 x 1012
b) 3 x 1013 x 7 x 1015
15. Write the unit place in the squares of the followings
a) 1223
b) 254876
c) 283467464
d) 1245
e) 34756567
16. Find the square roots of the followings by prime factorization method
a) 7921
b) 9801
c) 576
d) 6400
e) 729
17. Find the smallest number by which 125 should be multiply to get a perfect square.
Also find the square root of the number.
18. Find the smallest number by which 396 should be divided to get a perfect square.
Also find the square root of the number.
19. Find the smallest perfect Square that is exactly divisible by 25, 24 and 18