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Class

9

LABORATORY MANUAL

inSCIENCEFor Term 2

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CONTENTS

Unit Topic Page

(v)

1. Atoms and Molecules 9 – 17

Experiment 1 : To verify the law of conservation of mass in a chemical reaction.

2. Diversity in Living Organisms 18 – 49

Experiment 2 : To study the characteristics of Spirogyra / Agaricus, Moss / Fern, Pinus (either with male or female cone) and an Angiospermic plant. Draw and give two identifying features of each groups they belong to.

Experiment 3 : To observe and draw the given specimens - earthworm, cockroach, bony fish and bird. For each specimen record :

(a) One specific feature of its phylum (b) One adaptive feature with reference to its habitat.

Experiment 4 : To study the external features of root, stem, leaf and flower of monocot and dicot plant.

3. Why do we fall ill? 50 – 55

Experiment 5 : To study the life cycle of a mosquito.

4. Floatation 56 – 85

Experiment 6 : To determine the density of a solid (denser than water) by using a spring balance and a measuring cylinder

Experiment 7 : To establish the relation between loss in weight of a solid when fully immersed in (i) tap water, (ii) salty water, with the weight of water displaced by it by taking at least two different solids.

Experiment 8 : To observe and compare the pressure exerted by a solid iron cuboid on sand while resting on its three different faces and to calculate the pressure exerted in the three cases.

5. Sound 86 – 103

Experiment 9 : To verify the laws of reflection of sound.

Experiment 10 : To determine the velocity of a pulse propagated through a stretched string / slinky.

Sr. No. Experiment RemarksPageDate

(vi)

ActivitiesLIST OF EXPERIMENTS

1. To verify the Laws of reflection of sound.

2. To determine the density of solid (denser than water) by using a spring balance and a measuring cylinder.

3. To establish the relation between the loss in weight of a solid when fully immersed in

a) tap water

b) strongly salty water, with the weight of water displaced by it by taking at least two different solids.

4. To observe and compare the pressure exerted by a solid iron cuboid on fine sand/ wheat flour while resting on its three different faces and to calculate the pressure exerted in the three different cases.

5. To determine the velocity of a pulse propagated through a stretched string/slinky.

6. To study the characteristic of Spirogyra/Agaricus, Moss/Fern, Pinus ( either with male or female cone) and an Angiospermic plant. Draw and give two identifying features of the groups they belong to.

7. To observe the given pictures/charts/models of earthworm, cockroach, bony fish and bird. For each organism, draw their picture and record:

a) one specific feature of its phylum.

b) one adaptive feature with reference to its habitat.

8. To verify the law of conservation of mass in a chemical reaction.

9. To study the external features of root, stem, leaf and flower of monocot and dicot plants.

10. To study the life cycle of mosquito.

SECOND TERM Practicals should be conducted alongside the concepts taught in theory classes.

PREFACE

(vii)

CBSE always believe in Global Trends of Educational Transformation. The CBSE curriculum gets its lead from National Curriculum Framework – 2005 and Right to Free and Compulsory Education Act – 2009. As said by John Holt “We learn to do something by doing it. There is no other way” is very true and this is the reason why CBSE has Science Practical's as a part of curriculum of class IX and X. So that students can perform what they learn in theory subject.

The Science Lab Manual for Classes IX & X has been written so as to supplement the need of the students to prepare for lab work and learn science practical during the entire year.

This Lab Manual includes all activities and experiments as specified in latest CBSE curriculum. It also includes questions from all sets of Term 2 March 2010 to March 2015 Board Examinations with detailed answers. Practical based questions have also been included in the form of Multiple Choice Questions (MCQs) and Short Answer Type Questions. At the end of every activity Viva Voce questions have been given for extra practice. Group Activities provide will help students to learn team work. Projects have been added to facilitate collective efforts and extension of learning to real life. Each activity/experiment comprises of theoretical concepts which provides brief description about activities.

This book is strictly according to the latest CBSE guidelines, and contains more than sufficient viva voce questions and brief description of each activity/experiment, which help students in practicing and completing the lab work. All activities and experiments are always checked twice and tried to make precise. Practically, this book provides students everything they need to learn during their lab work. Since we believe in continuous improvement, hence this book has been written with accuracy as well as updated as per CBSE guidelines and reviewed at different tiers by panel of experts.

We are sure that this book will serve as a perfect teaching guide for the teachers and good lab manual for the students. It is expected that they will take full advantage of our knowledge and experience.

At last we would like to thank our authors, editors, reviewers and specially students who regularly send us suggestions which helps in continuous improvement of this book and makes this book stand in the category of “One of the Best”. Wish you all Happy Learning.

–Publisher

Sr. No. Activity / Project

Remarks/Signature

Record of the Activities/Projects performed

PageNo.Date

(viii)

Matter – Its Nature and Behaviour

chapter 1

Materials Required

9

ATOMS AND MOLECULES

AimTo verify the law of conservation of mass in a chemical reaction.

THEORY

Barium chloride (BaCl .2H O), distilled water, one beaker (250 ml), spring balance (0-500g), 2 2

two watch glasses of known masses, sodium sulphate (Na SO . 10H O), two beakers (150ml), 2 4 2

physical balance, polythene bag, glass stirrer.

Law of conservation of mass states that the mass remains conserved during a chemical reaction. In this experiment we shall verify the law of conservation of mass using a precipitation reaction. This reaction is considered as the simplest method to verify this law.

Procedure

1. Pour 100 ml distilled water in two beakers (150 ml). 2. Using the physical balance and a watch glass of known mass, weight 7·2 g of BaCl .2H O 2 2

and dissolve it in a beaker (150 ml) containing 100 ml distilled water. 3. Similarly, weigh 16·1 g of Na SO .10H O in another watch glass of known mass and 2 4 2

dissolve it in another beaker (150 ml) containing 100 ml distilled water 4. Take the third beaker (250 ml) and weigh it using a spring balance and polythene bag. 5. Mix both solution of 150 ml beakers in the third beaker (250 ml). Mix the contents using a

glass stirrer. 6. On mixing white precipitate of BaSO appears due to precipitation reaction.4

7. Weigh the beaker containing the reaction mixture again to determine the mass of the precipitation reaction products.

8. Compare the masses of beakers before and after the chemical reaction.

OBSERVATIONS

1. Mass of 100 ml distilled water = 100·0 g (The density of distilled water is 1 gm/ml) 2. Mass of BaCl .2H O = 7·2 g2 2

3. Mass of BaCl solution = 107·2 g2

EXPERIMENT NO. 1

UNIT I

Oswaal CBSE CCE Laboratory ManualFor Class 9 (Term 2) science

Publisher : Oswaal Books ISBN : 9788184818024 Author : Panel Of Experts

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