ACADEMIC SESSION 2019 CLASS IX (IGCSE) HOLIDAY …...CLASS – IX (IGCSE ... experiences while doing the project. Page- 5 to Page- 12 Subject Matter: Chapters with relevant ... Pure

DRSIS/INTEGRATED HOLIDAY HOMEWORK / 2019-20 Page 1

ACADEMIC SESSION 2019 – 2020

CLASS – IX (IGCSE) HOLIDAY HOMEWORK

Student Name: Date :

INVESTIGATORY TOPIC Nutrition and Health

THEME “Nutrition in the life of millennial teenagers”

OBJECTIVE To research and analyze the role of nutrition in the life of millennials and the factors

contributing to the rise in consumption of harmful products aimed at this age group.

GUIDELINES

The total length of the Project should not be more than 15 pages of A-4 size paper.

The project will be handwritten and credit will be awarded to original drawings,

illustrations and creative use of materials.

The project will be presented in a neatly bound simple folder. Please avoid plastic

cover. Instead, use handmade paper file. Colours suggested are – Blue, Yellow and

Green.

The project report will be developed and presented in the following order:

Page- 1 Cover Page showing project title, student information, school and

year.

Page-2 Contents: List of contents with page numbers.

Page- 3 Acknowledgements: Acknowledging the institution,

offices and libraries visited and persons who have helped.

Page- 4 Project Overview: Purpose, Aim, Methodology and

experiences while doing the project.

Page- 5 to Page- 12 Subject Matter: Chapters with relevant

headings and illustrations.

Page- 13 Conclusions: Based on findings. (Summary and Suggestions)

Page- 14 New findings

Page -15 Suggestions and recommendations

Page-16 Bibliography: It should have the title, pages referred, author,

publisher, year of publication and if a website the name of the website with the

specific website link which has been used.

Page - 17 –Feedback form

All the photographs & sketches should be labelled and acknowledged.

SUBJECT TASK AND LINKAGES:

English Find two print advertisements of junk food aimed at your age group and

discuss the linguistic/stylistic features that make them appealing to you.

Hindi

आजकल छात्र जंकफूड की ओर अधिक आकधषित हो रहे है उसका क्या कारण है और

उससे होने वाले हाधन के बारे में धवस्तार से उदाहरण सधहत २५०-३०० शब्ो ंका A4

शीट में धलख कर आइए|


French

Are French teenagers addicted to fast food like their counterparts in other

countries? Justify your response with examples. Watch the report by TV5

Monde/ Le Monde.

Spanish

Choose any one of the Latin American countries that speaks Spanish. Research

on their negative food habits and the increase in diseases like obesity, high

blood pressure, osteoporosis etc that happen due to following an unhealthy

diet. Write a report on the researches and findings. Don’t forget to cite the

quotes, studies and statistics.

Use BBC Spanish - https://www.bbc.com/mundo/america_latina, google

Spanish of the country to search for articles.

Mathematics Research on body mass index (BMI) and plot 2 graphs relating BMI with age

and income group.

Combined Science

Research on 7 chemicals or adulterants present in our daily diet like MSG and

highlight its role on human health.

Also, write a method to separate/identify or test these chemicals from the food

products.

Pure Physics

Create a diet chart based on your daily food intake and calculate the calories

you are consuming. Also measure your body weight and the amount of calories

burnt due to activities (swimming, yoga, jogging etc.) you are doing each day.

Present your observations regarding the difference in calorie intake and calorie

loss.

Pure Chemistry

Compile your research findings using the following instructions

What are the taste-enhancing chemicals present in junk food?

Discuss the short-term and long-term effects of consuming junk food.

Self reflection - State your habits of consuming healthy vs. junk food.

Introduction

Evaluation and Analysis

Conclusion

Presentation - TNR-12 , Title, Images, Data Collection and References

Refer following links for better understanding-

https://www.youtube.com/watch?v=guxledYcXcE

https://www.buzzfeed.com/deenashanker/ways-fast-food-companies-trick-

you-into-eating-more-junk

Pure Biology

“Deficiency diseases are those which are caused by lack of certain essential nutrients,

especially vitamins and minerals in one’s diet over a prolonged period of time.”

Night blindness, Beri-beri, Xeropthalmia, Scurvy, Rickets, pernicious anaemia, etc are

some of the vitamin deficiency diseases.

Choose any 3 vitamin deficiency diseases and carry out a detailed study on 3

Nutrition related health concerns, Dietary Intakes and Eating Behaviours of

teenagers.

Also figure out how to prevent vitamin deficiency diseases?

What are the most important vitamin related nutritional concerns with the

onset of puberty?

https://www.bbc.com/mundo/america_latina

https://www.youtube.com/watch?v=guxledYcXcE

https://www.buzzfeed.com/deenashanker/ways-fast-food-companies-trick-%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20you-into-eating-more-junk

https://www.buzzfeed.com/deenashanker/ways-fast-food-companies-trick-%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20you-into-eating-more-junk


Economics

One of the primary objectives of an economy is economic development.

Economic development can be referred to as well being of all the citizens in an

economy and this is measured by comparing education, health care and access

to basic amenities.

However, this year, the economic wing of United Nations is focusing on food

and nutrition for age group below 20.

Compare and contrast between different countries on accessibility for basic

food amongst teenagers.

How will an economy affect if the growing ups lack basic food and nutrition?

Business Studies

Students should collect five competitive products targeted at consumers below

15 years of age and prepare a chart showing the information about Nutritional

ingredients used in the product packaging by different competitors.

ICT

Make a video on Nutrition and Health using any video making software(like

Biteable)

Also make a three folded brochure using Publisher.

P.E.

Topic: Nutrition in the life of teenage athletes.

Objective:

To analyze the role of sports nutrition in the life of aspiring athletes and

the factors contributing to the rise in consumption of PEDs during this

phase of learning and growth.

Sports Nutrition is different from regular nutrition and the diet chart for an athlete

has to be designed keeping in mind the specific needs and requirements of an

athlete with regard to the nature of his/her training method which focuses on

specific components of fitness i.e. endurance, strength and so on.

Design a nutrition plan (2-week) for yourself, keeping your training method

and nutritional requirements in mind.

Analyse the importance of carbohydrates, fats and proteins along with their

appropriate/recommended proportions in your meal plan.

Mention the various PEDs that are easily accessible to you in your everyday

life.

Would you choose to consume them on a regular basis in order to enhance

your performance? Yes/No? And why?

Art and Design Make 4-6 portraits of your choice using different media like watercolor, Acrylic or

charcoal on A3 size art sheet.

Criteria for Assessment -

20M

Content - 5

Originality - 5

Quality of presentation – 5

Visual Appeal – 5

__________________ _______________________ _________________________

Ms Pranaya Pradip Ms Abha Hanspal Mr Rudolf Noronha

(Class Teacher) (IBDP Coordinator) (Principal)


ACADEMIC SESSION 2019-20

GRADE IX IGCSE

ENGLISH HOLIDAY HOMEWORK

WORKSHEET 2

Student Name: Date: _ December 2019

Write a book report of around two pages on any ONE of the books mentioned below. The book

review must contain the following details

the title of the book

the author of the book

the time when the story takes place

the location where the story takes place

descriptive details that you liked

many quotations and examples from the book to support your opinions

Your thoughts about the plot, characterization and theme

Book List

1. Dead Poet’s Society- N.H. Kleinbaum

2. The House on Mango Street- Sandra Cisneros

3. The Curious Incident of the Dog in the Night-Time- Mark Haddon

4. The Women of Brewster Place- Gloria Naylor

5. Chasing Redbird- Sharon Creech

6. The Palace of Illusions- Chitra Banerjee Divakaruni

Please remember that the book report must tell me what YOU thought about the book. Submitting

plagiarized information is not only a dishonest act but also a criminal waste of time.



GRADE IX IGCSE

ENGLISH HOLIDAY HOMEWORK

WORKSHEET 1

Student Name: Date: _ December 2019

In this passage, the narrator returns to an old house in which he hid something several years before. He

thinks that the house is empty and deserted.

THE HIDDEN BOX

I opened the iron gate and walked as softly as I could up the weed-tufted gravel drive. My mind was strangely

empty. I felt no glow of pleasure and was unexcited at the prospect of becoming rich. I was occupied only

with the mechanical task of finding a black box.

The front door was closed and set far back in a very deep porch. The wind and rain had whipped a coating of

gritty dust against the panels and deep into the crack where the door opened, showing that it had been shut

for years. Standing on a derelict flower-bed, I tried to push open the first window on the left. It yielded to my

strength, raspingly and stubbornly. I clambered through the opening and found myself, not at once in a room,

but crawling along the deepest window-ledge I had ever seen. After I had jumped noisily down upon the floor,

I looked up and the open window seemed very far away and much too small to have admitted me.

The room where I found myself was thick with dust, musty and empty of all furniture. Spiders had erected

great stretchings of their webs about the fireplace. I made my way quickly to the hall, threw open the door of

the room where the box was and paused on the threshold. It was a dark morning and the weather had stained

the windows with blears of grey wash which kept the brightest part of the weak light from coming in. The far

corner of the room was a blur of shadow. I had a sudden urge to have done with my task and be out of this

house forever. I walked across the bare boards, knelt down in the corner and passed my hands about the floor

in search of the loose board. To my surprise I found it easily. It was about two feet in length and rocked

hollowly under my hand. I lifted it up, laid it aside and struck a match. I saw a black metal cashbox nestling

dimly in the hole. I put my hand down and crooked a finger into the loose reclining handle, but the match

suddenly flickered and went out and the handle of the box, which I had lifted up about an inch, slid heavily

off my finger. Without stopping to light another match, I thrust my hand into the opening and, just when it

should be closing about the box, something happened.

http://www.studentbounty.com/





I cannot hope to describe what it was, but it had frightened me very much. It was some change which came

upon me or upon the room, indescribably subtle, yet momentous. It was as if the daylight had changed with

unnatural suddenness, as if the temperature had altered greatly in an instant or as if the air had become twice

as rare or twice as dense as it had been in the twinkling of an eye. Perhaps all of these, or other things, happened

together, for all my senses were bewildered all at once and could give me no explanation. The fingers of my

right hand, thrust in the opening in the floor, had closed mechanically, found nothing at all, and came up again

empty. The box had gone!

I heard a cough behind me, soft and natural, yet more disturbing than any sound that could ever come upon

the human ear. That I did not die of fright was due, I think, to two things: the fact that my senses were

already disarranged and able to interpret to me only gradually what they had perceived, and also the fact that

the utterance of the cough seemed to bring with it some more awful alteration in everything. It was as if the

universe stood still for an instant, suspending the planets in their courses. I collapsed weakly from my

kneeling backwards into a limp sitting-down position upon the floor. Sweat broke out on my brow and

my eyes remained open for a long time without a wink, glazed and almost sightless.

In the darkest corner of the room, near the window, a man was sitting in a chair, eyeing me with a mild but

unwavering interest.

Answer the following questions

1. Which word in the first sentence of the passage shows that the narrator did not want to be heard?

2. By referring to what the narrator says in paragraph 1, explain what might be found surprising about his

state of mind.

3. Give two words from the second paragraph which suggest that the window was difficult to open.

4. Where was the cash box hidden, and how did the writer find it?





5. Explain, using your own words, the change which the writer felt had come over the room and how this

affected his state of mind in paragraph 4.

6. Why do you think the writer uses the word ‘stretchings’ (line 11) to describe the spiders’ webs?

7. Re-read lines 8–21 (from ‘After I had jumped noisily down…’ to ‘…something happened’). Choose

three details which the writer uses to suggest a sense of uneasiness and fear. Explain how each of these

details suggests this sense.

8. Explain, using your own words, what the writer means by ‘my senses were already disarranged’ (lines

30-31).

9. Explain, using your own words, what the writer means by ‘with a mild but unwavering interest’ (line 36).


10. Re-read lines 1–21, and then write a summary of what you have learnt about the appearance of both the

outside and inside of the house. (Write a paragraph of about 50-70 words.)



CLASS –IGCSE, MATHS

TOPIC –HHW 1

Student’s Name: Roll No:-




CLASS –IGCSE, MATHS

TOPIC –HHW 2

Student’s Name: Roll No:-




CLASS: IX (IGCSE)

SUBJECT: HOLIDAY WORKSHEET-2

Name: Date :


1.

2.

3.

4.



CLASS: IX (IGCSE) SUBJECT:

HOLIDAY WORKSHEET-1

Name: Date :



PHYSICAL EDUCATION

WORKSHEET 1

ACADEMIC SESSION: 2019-2020

CLASS – IX (IGCSE)

Name:- Roll No.:-

1. You are a basketball player. In January 2020 you have a national inter-school basketball tournament

coming up. According to your coach, your weaknesses are endurance, strength and speed. Discuss a

training programme which you should adopt during the month of December that can help you to

develop a) Endurance b) Strength and c) Speed. Your training regimen should be able to justify your

choice of action/exercises.

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2. Design a circuit that can target your weaknesses mentioned in the previous question. Is circuit training

best for overcoming your weaknesses? Yes/No and why?

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Justification:

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Circuit training is/is not the best option available for tackling my weaknesses because

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PHYSICAL EDUCATION

WORKSHEET 2

ACADEMIC SESSION: 2019-2020


Name:- Roll No.:-

1. What do you mean by ‘skill’? Elaborate the impact of different factors on the development of skills

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2. What do you mean by supplementation? Give examples of two supplements commonly used by

sportspeople. With the help of dietary manipulation, design a diet plan for: a marathoner on the

night prior to a full marathon.

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ACADEMIC SESSION 2019 – 2020 CLASS – IX IGCSE, ESPAÑOL

Topic: Practica escrita

Name: Date :



IX IGCSE CHEMISTRY(Pure)

HOLIDAYS HOME-WORK WORKSHEET-1

Student’s Name: Date:

1. Which statements are properties of an acid?1 reacts with ammonium sulphate to form ammonia

2 turns red litmus blue

2. Which property is not characteristic of a base?

A It reacts with a carbonate to form carbon dioxide.

B It reacts with an acid to form a salt.

C It reacts with an ammonium salt to form ammonia.

D It turns universal indicator paper blue.

3. A sting from insect X has a pH of 6 and a sting from insect Y has a pH of 8.

The table shows the pH of four substances.


4. Three liquids, P, Q and R, are added to a mixture of hydrochloric acid and Universal Indicator

solution.

The following observations are made.

P the colour of the indicator turns purple.

Q the colour of the indicator does not change.

R there is effervescence and the indicator turns blue.

What are P, Q and R?


7.Hydrochloric acid is used to clean metals.

The acid reacts with the oxide layer on the surface of the metal, forming a salt and water.

Which word describes the metal oxide?

A alloy

B base

C element

D indicator




ACADEMIC SESSION 2019 – 2020 IX

IGCSE CHEMISTRY(Pure)

HOLIDAYS HOME-WORK WORKSHEET-2





3. Three ways of making salts are


● titration using a soluble base or carbonate

● neutralisation using an insoluble base or carbonate

● precipitation.

(a) Complete the following table of salt preparations.


ACADEMIC SESSION 2019 – 2020 CLASS –

IX -E IGCSE (PURE BIOLOGY) CONTROL AND

COORDINATION

Student’s Name: Date

General Instructions-

Answer all questions and paste/staple the worksheet in the class work note book.

Define the term sensitivity.

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Describe how voluntary actions differ from involuntary actions.

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Name the neuron that transmits impulses from a receptor.

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Glucagon stimulates liver cells, but has no effect on muscle cells. (i) State the effect that glucagon has on liver cells. ........................................................................................................................................ ........................................................................................................................................ (ii) State how hormones, such as glucagon and insulin, travel around the body. ........................................................................................................................................ ........................................................................................................................................

Hormone Growth Promotants (HGPs) are hormones. HGPs are used to improve the production of food from animals. Many of these HGPs are hormones that are secreted naturally by the gonads (ovaries and testes). Name two hormones that are secreted by the gonads. ..........................................................................................................................................

The organs of the human body are coordinated by the nervous system.

Outline one other way in which these organs are coordinated. ......................................................................................................................................... .........................................................................................................................................

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Complete the table by naming three sense organs and the stimulus which each detects.


Sense organs Stimulus


Outline how humans are able to see in colour. ........................................................................................................................................................................... ............................................................................................................................................. ............................................................................................................................................................ ............................................................................................................................................................

State the function of ciliary muscles and suspensory ligaments in human eye. .........................................................................................................................................................

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Outline how adrenaline affects the performance of a swimmer. ........................................................................................................................................................ ........................................................................................................................................................ .........................................................................................................................................................

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ACADEMIC SESSION 2019 – 2020 CLASS –IX- E IGCSE (PURE BIOLOGY)

COORDINATION AND RESPONSE



Answer all questions and paste/staple the worksheet in the class work notebook.

What is the other name for endocrine glands? Why are they so called? .................................................................................................................................................. ..................................................................................................................................................

Why adrenaline causes the pupils in the eye to widen? .................................................................................................................................................. ..................................................................................................................................................

Explain the effect of auxin on growth of plant when light falls onto the shoot only from one side .

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Name two important stimuli for plants. Explain how Roots and shoots respond to these

stimuli? .................................................................................................................................................. .................................................................................................................................................. ..................................................................................................................................................

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How do synapses ensure that nerve impulses travel in one direction? ...................................................................................................................................................

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Q.6. Myelin is made up of .................. and .......................... What is the function of myelin?

Label the parts of human eye correctly in the given figure and also state the function of each

part.


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What is reflex action?

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What are receptors and effectors? Explain with examples. ............................................................................................................................................... ............................................................................................................................................... ............................................................................................................................................... ...............................................................................................................................................

What is the role of rod cells and cone cells present in the retina of human eye?

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ACADEMIC SESSION 2019 – 2020 CLASS –IX -E IGCSE (COMBINED SCIENCE)

COORDINATION AND RESPONSE



Answer all questions and paste/staple the worksheet in the class work note book.

Q1. What are stimuli? How do plants respond to stimulus?

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Q2. Give an example of chemical control of plant growth.

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Q3. On which part of the shoot auxin is made? Explain the role of auxin in plant growth when

light is falling on the shoot only from one side?

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Q4. What is gravitropism and phototropism ? Explain with example.

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Q5. What are target organs?

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Q6. What makes adrenal glands to secrete adrenaline into the blood?

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Q7.Eplain response to gravity in a coleus roots and shoots.

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Q8.Why it is important in plants that its roots and shoots grow in appropriate direction?

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Describe an experiment to investigate the method by which shoots respond to light.

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Describe three situations in which adrenaline is likely to be secreted.

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ACADEMIC SESSION 2019 – 2020 CLASS – IX (IGCSE), ECONOMICS

Holiday Homework-1

Student’s Name: Date :

GE ( GENERAL ELECTRIC )

1. Caught between low demand growth for original equipment and emerging new competition, the

Company struggles with legacy issues of high costs and underutilization, while lagging industry

counterparts on key measures such as profitability, inventory turns, quality, etc. New CEO seeks to

improve the Company’s standing and financial position by launching a global change process

focused on productivity improvement and cost-effectiveness in all aspects of the business.

a. Define profuctivity (2)

b. Explain two factors which can influence productivity of a firm ( 4)

c. Analyse how capital intensive production method benefits a firm over labour intensive (6)

d. “Productivity can turn you into a robot”. Discuss the given statement (8)


ACADEMIC SESSION 2019 – 2020 CLASS – IX (IGCSE), ECONOMICS

Holiday Homework-2


1. What is market failure

2. What are negative and postive externalities of driving a car and learning emergency medical

resposnse ( EMR)

3. What are merit and demerit goods


4. How does governament intervention solve the problem of market failure. State the different

approaches of the governament.

5. Conserving resources versus preserving resources can also be stated as sustainable development.

Explain

.



CLASS – IX IGCSE , Business studies

TOPIC –SECTION-3: Marketing strategy

Worksheet-1

Student’s Name:

Month: December 2019 Date: -

1. Define ‘Marketing strategy’

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(2Q) What is meant by a ‘Market share’? ..........................................................................................................................................

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3Q. Outline the objectives of marketing ...............................................................................................................................

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(4Q) Draw the chart showing the relation between the stages of product life cycle And the Four P’s of marketing

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ACADEMIC SESSION 2019-20 CLASS – IX IGCSE

Business studies

HOLIDAY HOMEWORK

Worksheet-2

Student’s Name: DECEMBER:-





CLASS – IX -IGCSE, ICT

Holiday Homework Worksheet 1


Answer the following:

1. The use of computers has led to some employees changing their working patterns. Complete the

following sentences.

(a) Two or more employees doing the same job but working at different times is called

............................................................................................................................................. .[1]

(b) When employees work the full normal hours in a week but work at times which suit them

and the employer, this is called

............................................................................................................................................... [1]

2. Describe the GPS.

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3. Describe how expert systems can be used to diagnose illness in patients.

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4. Write the applications of the following sensors-

Temperature

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Pressure

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pH

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ACADEMIC SESSION 2019 – 2020 CLASS – IX -IGCSE, ICT

Holiday Homework Worksheet 2


Answer the following:

1. Describe the 3D printers use in medicine.

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2. What are the disadvantages of online banking?

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3. What is the advantage to employer of job sharing working pattern?

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4.Explain the disadvantages of robots over humans.

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5.Descibe the use of ADC and DAC in measurement applications

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PURE PHYSICS

HOLIDAY HOMEWORK WORKSHEET-1


1. The diagram shows a liquid-in-glass thermometer.

Which change increases the sensitivity of the thermometer? A a narrower capillary tube B a wider capillary tube C thicker glass around the bulb D thinner glass around the bulb

2. An object of mass 800g and specific heat capacity 250 J /(kg °C) is heated. It absorbs 5300 J of energy.

What is the increase in temperature of the object?

A 0.027 °C B 17 °C C 27 °C D 17 000 °C

3.(a) In the space below, draw a labelled diagram of the structure of a thermocouple thermometer. Include

the device from which a reading is taken.

(b) A thermocouple thermometer is used to measure the temperature of the flame of a small candle.

State two reasons why the thermocouple thermometer is suitable for this application.


4.(a) State three factors that determine the rate of evaporation of water.

(b) A person climbs out of a swimming pool and stands in the open air. Explain why evaporation of water

from the surface of the person’s body causes the person to feel cold.


5.(a) Explain what is meant by the term longitudinal wave.

(b) The frequency of the sound wave is 800Hz. The speed of sound in air is 330m/ s. Calculate the

wavelength of the sound wave.

6. The current in the heater is 3.8A and the potential difference (p.d.) across it is 12V. The iron block has a

mass of 2.0kg. When the heater is switched on for 10 minutes, the temperature of the block rises from 25°C to 55°C. Calculate the specific heat capacity of iron.


ACADEMIC SESSION 2019 – 2020 CLASS – IX (IGCSE)

PURE PHYSICS

HOLIDAY HOMEWORK WORKSHEET-2


1. A block of iron of mass M is heated and gains 10 kJ of internal energy. The temperature of the block rises by θ °C. A second block of iron of mass 2M is heated and gains 5.0 kJ of internal energy. What is the temperature rise of the second block in °C?

2. Which statement about convection is not correct?

A It enables water in a pan on a cooker to get evenly heated B It happens in liquids and gases. C It means that heat rises. D It occurs because the density of a fluid decreases when it is heated.

3.(a) In the student’s home there is a wood-burning stove, which is also made of iron. The mass of the

wood-burning stove is 85kg.

(i) State what is meant by the thermal capacity of an object

(ii) The specific heat capacity of iron is 460J/(kg°C). Calculate the thermal capacity of the wood-burning

stove.

4. (a)The thermometer used in a experiment has a small range and a large sensitivity. What is meant by

(1) Range-

(2) Sensitivity-

(b) State and explain the effect on the range of the thermometer of using a smaller bulb that contains less


mercury.

5. In a laboratory at normal room temperature, 200g of water is poured into a beaker. A thermometer placed in the water has a reading of 22°C. Small pieces of ice at 0°C are added to the water one by one. The mixture is stirred after each addition until the ice has melted. This process is continued until the temperature recorded by the thermometer is 0°C. The total mass of ice added to the water is found to be 60g.


(i) The specific heat capacity of water is 4.2J/(g°C). Calculate the thermal energy lost by the water originally in the beaker.

(ii) Assume that all the thermal energy lost by the water originally in the beaker is transferred to the ice. Calculate the specific latent heat of fusion of ice.

6. What do you mean by frequency and amplitude of sound wave?On what factors loudness and pitch of sound depends?



CLASS – X IGCSE WAVES AND ELECTROMAGNTIC WAVES


1. The mnemonic for electromagnetic waves is : --------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------.

2. The man cooks a fish in a microwave oven.

(i) On Fig. 6.3 place microwaves in their correct position in the incomplete electromagnetic spectrum.

(ii) Microwaves travel at a speed of 3 × 108m/ s. The wavelength of the microwaves used in the microwave oven is 0.12m. Calculate the frequency of the microwaves used.

State the formula you use and show your working.

formula

working

frequency = ............................................... Hz [2]

(c) Antarctic research stations use satellites to relay communications to their home bases.

(i) Name the part of the electromagnetic spectrum used for satellite communications.

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(ii) On Fig. 6.4, put the part of the electromagnetic spectrum you have named in (i) in its correct place in the

incomplete electromagnetic spectrum.

(d) The man on the snowmobile uses a radio to talk to the aircraft pilot as he watches the aircraft landing.

He can hear the sound of the engines of the aircraft in Fig. 6.3 several kilometres away.

(i) The man hears the sound of the engines for several seconds after the pilot says over the radio that the

engines have been switched off. Explain why this happens.

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(ii) Describe how the engines produce sound and how this is transmitted to the man.

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The Sun produces sound waves as well as electromagnetic radiation.

(i) Explain why we cannot hear any sound from the Sun.

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(ii) It takes eight minutes for the visible light emitted from the Sun to travel to the Earth. Suggest how long

it would take for a burst of X-rays emitted by the Sun to travel to the Earth. Give a reason for your

answer. ...........................................................................................................................................

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ACADEMIC SESSION 2019 – 2020 CLASS

– IX IGCSE THERMAL PHYSICS


Fig. 6.1 shows a man standing in the sea on a sunny day.

(a) (i) The man says that his back is getting too hot in the Sun. Explain why wearing a white shirt can prevent

the temperature of his back from increasing.

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(ii) The temperature of the man’s body is 37°C. The temperature of the sea water is 15°C. Explain why

the man says that the water feels cold to his feet.

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(iii) The man walks out of the sea, and his wet feet slowly become dry. He says that his feet get colder as

they dry. Complete the sentences below that explain in terms of the movement of molecules why his

feet get colder as they dry.

The......................................................................... water molecules escape from the surface of the water

on his feet. This means that the remaining water molecules have less

.......................................................................... so the remaining water on his feet is at a lower

.......................................................................... .

2. An aircraft is flying at a height of 10000m. Outside the aircraft the temperature is −55°C, but inside the

aircraft the air temperature is kept at 21°C.

(a) (i) State the main method of thermal energy transfer from air inside the aircraft to the air outside.

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(ii) Describe in terms of molecular motion how thermal energy is lost from air inside the aircraft to the

air outside. ...........................................................................................................................................

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(b) Inside the aircraft’s jet engines, the temperature reaches 1700°C as the jet fuel burns. The

combustion of the fuel forms exhaust gases containing carbon dioxide and water molecules.

(i) State which of the diagrams in Fig. 6.1, X, Y or Z, shows the arrangement of these molecules as


they are formed in the engine. Give a reason for your answer

diagram .............. reason

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Suggest how the motion of the water molecules formed in the jet engines differs from the

motion of water molecules in a glass of water inside the aircraft. Give a reason for your answer.

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3. Fig. 6.1 shows a man riding a snowmobile across snow and ice at a research station in Antarctica.

(a) The temperature of the air is −40°C, but the man must keep his body temperature at 37°C. (i) State the

main method of thermal energy transfer from the man through his clothing to the outside.

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(ii) The man wears several layers of thin clothing which trap air between them, instead of one layer of

thick clothing. Suggest one reason for this.

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(B) Fig. 6.3 shows white trails coming out of the engines of an aircraft landing at the research station when the

air temperature was −45 °C.

The white trails are made of ........................................................................................... reason

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[Source: 0653/43/M/J/17]


ACADEMIC SESSION 2019 2020 IX IGCSE COMBINED CHEMISTRY

ENERGY CHANGES AND CHEMICAL REACTIONS-1




ACADEMIC SESSION 2019 – 2020 IX IGCSE COMBINED CHEMISTRY

ENERGY CHANGES AND CHEMICAL REACATIONS-2




DRSIS/INTEGRATED HOLIDAY HOMEWORK / 2019-20 Page

68

ACADEMIC SESSION 2019 –

2020 CLASS –IX- E IGCSE)

ART AND DESIGN

Worksheets 1 and 2


December

1. Complete figure drawing, poses in your portfolio– static poses, dynamic poses, Stick form and 3D form.

2. Make a composition using figure drawing.

Documents

ACADEMIC SESSION 2019 CLASS IX (IGCSE) HOLIDAY …...CLASS – IX (IGCSE ... experiences while doing the project. Page- 5 to Page- 12 Subject Matter: Chapters with relevant ... Pure