Holiday Homework Summer Vacation 2016-17 MATHEMATICS Class – VI A,B,C

1. Prepare 15 MCQ type questions from the first chapter with answers 2. Solve all the questions of the exercises of the first chapter. 3. Write Properties of whole numbers with examples 4. Prepare a project on “History of whole numbers”

SCIENCE CLASS VI ABC 1.Prepare an activity file and draw the edible parts of a plant......Each of the parts that we eat-root ,stem, leaves, flower and seeds..(giving three examples from each part). 2. Answer the questions of textbook from the topic "Food:where does it come from" 3. Write the summary of ch-1 and ch-2 from the textbook in science homework copy. CLASS VII ABC SCIENCE 1.Prepare an activity file and draw or paste 8 collected pictures of different modes of nutrition undertaken by plants. Include the following - (autotrophic mode of nutrition and heterotrophic mode of nutrition). Write in brief about each type of nutrition. 2. Maintain an activity file about names of any 20 scientists with their inventions, discoveries and other important details like date and place of birth etc. 3. Answer the questions of textbook from the topic "Nutrition in plants". Class – VII A,B,C MATHEMATICS

1. Prepare 15 MCQ type questions from the first chapter with answers 2. Solve all the questions of the exercises 1.1 and 1.2 3. Write Properties of integers with examples 4. Prepare a project on “History of iintegers”

CLASS VIIIABC SCIENCE 1. Read the chapter microorganism: friend and foe thoroughly. Complete all questions and answers of the exercise in HW notebook in a neat handwritings.

2. Write about micro organisms (with colourful pictures), types of micro organisms and usefulness of them to human kind. (separate file on A4 size papers )

3. Draw a table and identify common food preservatives from common food items like soft drinks, pickles, jam, chips etc.

Food items/preservatives /mfd dt/ expiry date( format of table ) # in the same file.

NEXT PAGE FOR CLASS IX AND X

SCINCE for class IX ABC

Class 9th BIOLOGY

Write practical’s of biology as given in text book.

Exp 1 a) To test the presence of starch in the given food sample. b) To test the presence of the adulterant metanil yellow in dal.

Exp 2 To prepare stained temporary mounts of a) Onion peel b) human cheek cells and to record observations and draw their labelled diagram.

Exp 3 To identify a) parenchyma and sclerenchyma tissues in plants.

b) striped muscles fibres and nerve cells in animals from prepared slides and to draw their labelled diagrams .

Buy one biology practical notebook and draw the diagrams only in pencil. Students can use black and blue pen for writing .

Write a topic on "sustainable agriculture is the need of modern times."In file with A4 size papers margined 1 inch 4 sides . Hand written work is only accepted.

CHEMISTRY

MATTER IN OUR SURROUNDING

1MARK

1. Name the physical state of matter which can be easily compressed?

2. A substance has neither a fixed shape nor a fixed volume. Name the state of this

substance?

3. Name the physical state of matter which has a definite volume as well as definite shape.

4. Name the physical state of matter which has a fixed volume but no definite shape.

5. Name the property of liquids and gases which tell us that their molecules are constantly

moving.

6. Name the SI unit of temperature.

7. Name the physical state of water at 0°c and 20°c.

8. Name a substance which exists in all the three states of matter.

9. What is the common name of solid carbon dioxide?

10. Name the process in which a solid directly change into gas.

11.What is SI unit of density?

12.What is dry ice?

13. What is normal room temperature?

14.What is BEC?

15.What is a Lattice?

16. which state of matter shows maximum movement of particles?

17.What is SI unit of pressure?

18. Why air is more dense over the sea?

19.How can a gas be converted into liquid?

20.Why does the smell of hot cooked food reach you several metres away within seconds?

Page-2

Matter in our surronding (2marks)

1. What are the five state of matter?

2. Write down the full form of CNG and LPG?

3. Give two reasons to justify –

Water is a liquid at room temperature.

4. Convert the temp from kelvin to Celsius.

1.350c 2. 40

0c

5. Convert the temperature from Celsius to kelvin

1.295k 2.373k

6. Define latent heat of fusion?

7. Define latent heat of vaporization?

8. Why do we wear cotton clothes during summer?

9. Define melting point of a substance? What is the melting point of ice?

10. Define boiling point of a substance? What is boiling point of water?

11. Explain, how does perspiration or sweating keep our body cool and comfortin a hot

summer day?

12. Explain why naphthalene ball kept in stored clothes in boxes disappear our a period of

times?

13) What is the physical state of water?

a) At 0 0c b) at 25

0c c) at100

0c d) At 250

0c

14) a) Define condensation?

b) Explain the role of condensation in nature.

15) When alcohol is applied on our arm we feel cool. Why is it so?

16) Name two processes by applying which, a gas can be liquefied?

17) A white crystalline substance on heating directly changes into gas.

a) Name the substance

b) Name the process involved.

18) Explain why should we wear cotton clothes during hot summer days?

19) Give scientific reason. During hot summer days water is usually kept in earthen pot

called pitcher.

20) Explain why we are able to sip hot tea or milk faster from a saucer rather than from a

cup?

Page-3

(3marks)

1. Explain why steam at 1oo0c is better for heating purpose than boiling water at 100

0c?

2. Which causes more severe burns boiling water or steam? Why?

3. Which contain more heat 1kg of ice at 00c? Support your answer with reason?

4. Which contain more heat 1kg of stem at 1000c or 1kg of water at 100

0c? Support your

answer with reason?

5. Explain why ice at o0c is more effective in cooling than water at the same temperature?

6. Explain why does the temperature remain constant during the melting of ice-cream though

heat is supplied continuously?

7. Evaporation causes cooling. Justify the statement by giving suitable example.

a) Define Brownian movement.

b) The existence of Brownian motion gives which two conclusions about the nature of matter.

8. Write down the important characteristics of particles of matter.

9. Out of solids, liquids & gases which one has:-

a) Maximum movement of particles?

b) Maximum force of attraction between the particles?

c) Minimum spaces between the particles?

10. a ) why does a gas exert pressure?

b) Why does a gas fill a vessel completely?

c) Why are gases highly compressible?

MATTER IN OUR SURROUNDING 1. (i) Define the term evaporation? (1+2+2)

(ii) What are the factors affecting rate of evaporation?

(iii) Explain with example how evaporation causes cooling?

2. (i) Define the term sublimation. (1+1+3)

(ii) Name two substances which undergo sublimation except Ammonium

Chloride.

(iii) Draw the labelled diagram of experimental setup to demonstrate

sublimation of Ammonium Chloride.

3. Give a comparison of any five properties of solids, liquids and gases in a

tabular form. (1X5=5)

4. (i) Define the term diffusion. (1+2+1+1)

(ii) Out of three states of matter in which rate of diffusion is fastest and why?

(iii) Name two gases of air which dissolve in water by diffusion.

(iv)Give an example of diffusion from your daily life observation.

5. Compare the following properties of solids, liquids and gases.

(1X5=5)

(a) Rigidity and fluidity (b) Compressibility

(c) Diffusion (d) shape and volume.

(e) Force of attraction between the particles

6. Give scientific reason for the following observations. (1X5=5)

(a) Naphthalene balls disappear with time without leaving any solid.

b) We can get the smell of perfume sitting several meter away.

c) Water at room temperature is a liquid.

d) An iron Amirah is a solid at room temperature.

e)Ice at 273K is more effective in cooling than water at the same

temperature.

7.a) Describe an activity to demonstrate that water vapour is present in air.

b) Diagrammatically show matter triangle for interconversion of states.

c) Give a suitable example of interconversion of the three states of matter.

8) .a) calculate the amount of water required to prepare 500 g of 2.5% solution of sugar?

b) Why do colloids show Tyndale effect not the true solutions?

c) Why filter paper is not used to separate the constiuents of a colloid?

9) Describe the principle and application of following methods of separation.

a) Paper chromatography c) distillation

b) Centrifugation d) separating funnel

CLASS X (ABC)

HOLIDAY HOME WORK

Chapter 1 : Chemical Reactions & Equations

MULTIPLE CHOICE QUESTIONS(1 marks)

1. Solutions of lead nitrate when treated with potassium iodide forms a ---------- precipitate

A.White B.Yellow

C.Violet D.Pink

2. In the reaction 2Mg +O2--2MgO ,Magnesium acts as

A.Oxidising Agent B.Reducing Agent

C.Both oxidizing & reducing agent D.None of these

3.In the reaction H2S + Cl2 2HCl + S ,Chlorine acts as

A.Oxidising agent B.Reducing agent

C.Both oxidizing & reducing agent D.None of these

4.Which of the following is not a thermal decomposition reaction

A.Fe+CuSO4 FeSo4 +Cu B.2KClO3-2KCl+CO2

C.2FeSO4Fe 2 O3 + SO2 +SO3 D.ZnCO3 ZnO+CO2

5.G.I.Sheets are coated with ---

A .Nickel B. Chromium

C. Zinc D. Tin

6. Corrosion of------protects it

A Aluminium. B. Silver

C . Copper. D .Oxygen

7Which of the following prevents rancidity

A. Argon B. Nitrogen

C. Both 1&2 D. Oxygen

8. Cu +AgNO3-

A.AgNO3+ CuNO3 B.N2 + CuO + AgO

C.NO2 + CuO+Ag D.Cu(NO)3 +Ag

9. The colour of hydrated ferrous sulphate is

A Green. B. Brown

C. Blue D. White

10. Ca(OH)2 is commonly called

A. Quick lime B. Slaked lime

C. Milk of magnesia D.None of them

Very Short Answer Types Questions (1 marks)

1. What is a chemical equation ?

2. Do all decomposition reaction require energy?

3. Name the reaction in which oxygen is lost or hydrogen is gained

4. Black coat on silver and green coat on copper is due to-----

5. Substances which prevent oxidation are called---------

(Two mark questions)

1.Write balanced equations for the following

A)Barium chloride + Aluminium sulphateBariumsulphate +Aluminium chloride

B)Nitrogen + Hyrogen Ammonia

2.Classify the following as chemical/physical change

a) Grapes get fermented b)We respire c)Breaking of glass d)Food gets digested in our

body

3.Give any four observations determinant to chemical reaction

4. Two grams of silver chloride kept on a china dish is exposed to sunlight for sometime list

the changes likely to be observed. Give an equation for the reaction.

5.Give the difference between oxidizing agent & reducing agent

(Three mark questions)

1.What is corrosion? Give any two methods to prevent it. Can it be advantageous? if

yes give an example

2. What is a redox reaction? Describe with an example.

3. What is a balanced chemical equation ?Why should we balance it ?

4. List any three methods to prevent rancidity.

5. What is a precipation reaction? Give an example with an equation

(Five Marks Question)

1. What happens when a piece of

a) Iron rod added to copper sulphate solution

b) Aluminum metal is added to dilute HCl

c) Zinc metal is added to CuSO4 solution