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Friday, 26 April 2019

CLASS 9
SCIENCE WORKSHEET

HOLIDAY HOMEWORK (2019-20)

SUBJECT –SCIENCE(chemistry)

CLASS IX

Chapter 1 - Matter In Our Surroundings

I Choose the best correct option in the following questions

: Q.1. Which of the following changes represent sublimation?

(a) solid liquid (b) solid gas (c) liquid gas (d) gas liquid

Q.2. Gases do not have–

(a) high compressibility (b) high fluidity (c) high density (d) large volume

Q.3. Evaporation

(a) takes place below melting point (b) is a bulk phenomenon (c) takes place above boiling point (d) is surface phenomenon

Q.4. Particles of a liquid–

(a) are most ordered (b) move randomly (c) have large intermolecular spaces (d) can slip and slide over each other

Q.5. Which of the following pairs will not exhibit diffusion?

(a) hydrogen, oxygen (b) oxygen, water (c) salt, sand (d) sugar, water

Q.6. Which of the following is not a property of solids

(a) fixed shape and volume (b) interparticle spaces are minimum (c) Particles can move freely within a limited space (d) Forces of attraction between the particles are maximum

Q.7. The solid that would sublime on heating is

(a) wax (b) solid carbon dioxide (c) ice (d) butter

Q.8. A substance melts at -250 C and boils at 850 C, Which of the following statements about it is correct?

(a) It would be in solid state at -150C (b) It would be in gaseous state at -900C (c) It would be in liquid state at -250C (d) It can in liquid state or in gaseous state at -850C

Q.9. Melting points of four solids A, B, C and D are 780 C, 2620 C, 1000 C and 1680 C

Inter particle forces of attraction are in the order

(a) A>C>D>B (b) B>C>D>A (c) A>D>C>B (d) B>D>C>A

II S study the figure given below for inter conversion of particles of of states of matter carefully and answer the questions tha that follow:

Q.1. Name the process marked as A,B,C,D

. _____________________________________________________________________

Q.2. To which state of matter a liquid changes on increasing its temperature? ______________________________________________________________________________

Q.3. What change do we expect on increasing pressure and lowering temperature of a gas? ______________________________________________________________________________

Q.4. When a liquid is cooled, it may change into a new state of matter. Name that state. ______________________________________________________________________________

Q.5. What is sublimation? ______________________________________________________________________________

III Temperature can be measured in two different scales - °C and Kelvin (K)

The SI unit of temperature is Kelvin 

K =°C + 273

°C = K – 273

Q.1. Convert the following temperature to the celsius scale. a. 470 K b. 300 K c. 298 K

Q.2. Convert the following temperature to the Kelvin scale. a. 25°C b. 373°C c. 273°C

Q3 A sample of water was heated from 25°C to 30°C.

(a) What were the initial and final temperatures of water in Kelvin scale?

(b) How much was the rise in temperature on Celsius scale?

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HOLIDAY HOMEWORK

CLASS VII ,VIII,IX AND X

HOLIDAY HOMEWORK (2019-20)

SUBJECT –SCIENCE

CLASS -VII

1. Draw a creative mind map to describe the journey of your favourite food through the digestive system. Also list ten healthy eating habits.(A4-SHEET)

2. ELEMENTS

Create your own story using the first one or two alphabets of the words. Example is given below. Give an appropriate title to the story. The names of the elements can be repeated in the story .At the end of the story write the name of the first twenty elements in sequence.(A4-SHEET)

EXAMPLE. Henry( Helium }was very happy ( Hydrogen ).His friends (Fluorine ) Nancy (Sodium )and Carrie (Calcium) were coming to his cottage (carbon) to play with him………….

3. Make rainy season a season of exploration. Find out the plants that are seen only in rainy season. One example is ‘Toad Stool’ mushrooms.(A4-SHEET)

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SUMMER VACATIONS HOLIDAY HOMEWORK

CLASS 8

SUBJECT – SCIENCE

1. PREPARE A HERBARIUM FOR 10 TYPES OF CROPS IN A SCRAP BOOK. IDENTIFY THE PESTS THAT AFFECT THOSE CROP PLANTS.

2. MAKE A POSTER ON THE THEME- “GREEN REVOLUTION” . SIZE OF THE POSTER SHOULD NOT BE LESS THAN AN A-3 PAPER.

3. LEARN SYMBOLS OF THE FIRST 20 ELEMENTS OF THE PERIODIC TABLE, COMPOUNDS AND FORMULAE( GIVEN IN THE NOTE BOOK) ,THEIR VALENCIES AND METAL REACTIVITY SERIES.

HOLIDAY HOMEWORK

CLASS 9 (2019-20)

HINDI

ग्रीष्मावकाश गृहकार्य कक्षा नवीं
स्वास्थ्य केंद्र द्वारा आयोजित रक्तदान शिविर की जानकारी देते हुए एक विज्ञापन लिखिए ।
चित्र वर्णन
महादेवी वर्मा रचित गिल्लू को ध्यान में रखते हुए आप भी एक संस्मरणात्मक रेखाचित्र लिखिए ।

ENGLISH

1. Make a brochure of your state incorporating these ideas .(speak for 2 minutes)

1. Map

(a) state (b)capital (c)location (d) Ways to reach

2. Best time to visit

3. Institution of national importance

4. Places to visit

5. Shopping

6. Festival

7. Folk dances

8. Traditional dress

9. Cuisine

2. Make a beautiful bookmark for English book. Decorate it and write a famous quotation.

3. Worksheet based on jumble sentences and two passages for editing will be given.

SOCIAL SCIENCE

project on Disaster Management.

Project should cover introduction, types of disasters, aspects of disaster Management, disaster Management in India and conclusion.

MATHS

· Conceptual learning-

Chapter-1, 2 and 3 examples from textbook to be done in maths notebook.

· Creative learning

Lab manual work- activity on spiral thedorus and coordinates of an object as well as its image, to be done in lab manual notebook with the reference of maths lab manual.

Science

Biology worksheet on cell stucture

Chemistry-worklsheet on matter in our surroundings

Physics worksheet based on covered topics.

CLASS 10

1.PRACTICALS GIVEN IN THE BLOG

2.LEARN AND REVISE LEASSON 1 AND 2

3. COMPLETE IN TEXT AND EXERCISE QUESTION ANSWERS OF LASSON 2 ACIDS BASES AND SALTS