How to prepare for Class 9: Tips & Tricks, Important Questions for Physics, Chemistry & Biology Class 9 Notes | EduRev

Created by: Dr Manju Sen

Class 9 : How to prepare for Class 9: Tips & Tricks, Important Questions for Physics, Chemistry & Biology Class 9 Notes | EduRev

The document How to prepare for Class 9: Tips & Tricks, Important Questions for Physics, Chemistry & Biology Class 9 Notes | EduRev is a part of Class 9 category.
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One thing to be kept in mind all along the way for Science preparation is that practice is the key here. The more you practice for every topic, the better understanding is achieved.

 How to prepare for Class 9: Tips & Tricks, Important Questions for Physics, Chemistry & Biology Class 9 Notes | EduRev

Science Class 9 - Videos, Docs, MCQs
Includes 169 docs, 131 videos & 103 tests

Some things that you should follow and might be helpful in the learning process for science are:

1. Make sure to strengthen your basics initially by studying from the NCERT Textbooks. Study additional books only after you know that your basic concepts are clear. Study from the Science NCERT Textbook and practice all the solved examples and exercise questions thoroughly before moving forward to extra practice from additional books. Refer to NCERT Solutions in case of any doubt.

NCERT Textbooks and solutions

Chapter 1 - Matter in Our Surroundings

Chapter 2 - Is Matter Around Us Pure

Chapter 3 - Atoms and Molecules

Chapter 4 - Structure of the Atom

Chapter 5 - Cell - The Fundamental Unit of Life

Chapter 6 - Tissues

Chapter 7 - Diversity in Living Organisms

Chapter 8 - Motion

Chapter 9 - Force and Laws of Motion

Chapter 10 - Gravitation

Chapter 11 - Work and Energy

Chapter 12 - Sound

Chapter 13 - Why do we fall ill

Chapter 14 - Natural Resources

Chapter 15 - Improvement in Food Resources

2. Have a thorough knowledge of each and every topic of Physics, Chemistry and Biology you study as your knowledge is going to pay you at and not the number of books you study.

3. Develop a good understanding of topics. It will help you with those challenging questions or derive formulae in the rare chance you forget. This can be done by watching videos for various topics that will help you develop an interest in the topic.

4. Go through chapter notes during the revision to learn all the important concepts in one go. Then, move on to learning questions and answers for every chapter.

5. Evaluation is a very important step in the preparation. Test your knowledge with various topic-wise and chapter-wise tests on completion of each one of them. Also, attempt previous year papers and sample papers for further evaluation.

Past year Papers of Class 9 Science

6. In conclusion, understand each and every concept of Physics, Chemistry and Biology from the NCERT textbooks. Make notes as you study. Learn important definitions, experiments, short descriptions, reactions, equations, formulas, etc. Solve the questions at the end of the chapters.

(a) Physics

Revise the concepts in a sequential order. For example, only after understanding and being thorough with the concepts of Motion, one will be able to easily understand and revise the concepts of Laws of Motion. This not just boosts confidence but also develops interest and helps to save time.

Write down all the formulae with the full meaning of the variables and the SI and CGS units of each of them. This will help to prevent any silly mistake while solving a numerical.

Avoid revision by going through the concepts virtually. Practise learning and writing on your own regularly.

Avoid taking up any new concept just before the exams, practice and gain expertise on that which has already been learnt.

(b) Chemistry 

Focus on application-based questions from the ‘Matter in our Surroundings’ chapter.

Solve as many numericals on ‘Mole Concept’ and study the valencies of elements.

Practise writing chemical formulae.

Remember the theories on various models of the atom.

(c) Biology

Concentrate on all the cell organelles, and an application-based question is expected from osmosis, diffusion and plasmolysis.

Try to remember the similarities and dissimilarities of various phyla of the Animal Kingdom.

Remember the rules for writing a scientific name of an organism.

An inferential based question is expected from diseases in human beings.

Know the various modes of transmission and the symptoms of communicable diseases.

Biogeochemical cycles must be a compulsory inclusion while studying; all the cycles are important.

Remember the breeds of poultry, milch animals and fish.

Important Topics for Class 9 Science Preparation

Chapter 1: Matter in Our Surrounding

You can expect short, concept testing questions from this chapter.

Questions on different states of matter mainly solid, liquid and gas are asked indirectly by giving their characteristics.

  • When asked to define key concepts from this chapter, be sure to include examples as they are very important in case of change of states of matter like melting, freezing, evaporation, condensation and sublimation.
  • The concept of Latent heat should be on your finger tips.

Chapter 2: Is Matter Around Us Pure

This is another chapter that can help you score those easy numbers in the paper. Work on:

  • Element, compound and mixture
  • Homogeneous and Heterogeneous mixtures
  • True solution, Colloids and Suspension

Numerical questions are also asked from this chapter, so refresh your concepts on:

  • The ways of expression of concentration of solution, mainly
  • Mass by mass percentage of a solution
  • Mass by volume percentage of a solution

Chapter 3 – Atoms and Molecules

1. Laws of chemical combination

    a) Law of conservation of mass

    b) Law of constant proportions

2. Dalton’s Atomic Theory

3. Symbols of atoms of different elements

4. Atomic mass

5. Types of molecules

    a) Molecules of elements

    b) Molecules of compounds

6. Ions

7. Rules for writing chemical formulae

8. Calculation of molecular mass

9. Mole concept

Chapter 4 – Structure of the Atom

  • Thomson’s model of an atom
  • Rutherford’s model of an atom
  • Bohr’s model of atom
  • Distribution of electrons into different orbits
  • Valency
  • Atomic number and mass number
  • Isotopes and Isobars

Chapter 5:  Cell: The Fundamental Unit of Life

If you know this chapter very well,  you will be sure to sail through the exam because you can find long and short answer type questions being set from here.

  • Draw neat and well labeled structure of different types of cells and cell organelles.
  • Learn by heart the differences between prokaryotic cell and eukaryotic cell.

Chapter 6: Tissues

We know you have a tough time memorising the locations and functions of each tissue, therefore here’s a Meritnation Tip  to make this chapter a cake walk.

Chapter 7 – Diversity in Living Organisms

  • Hierarchy of classification
  • Features of all 5 kingdoms
  • Important characteristics of subdivisions of kingdom plantae and animalia

Chapter 8: Motion

This chapter has generally been viewed as one of those where students fumble. Questions on motion in term of graphs is commonly asked and students are at a loss so as to draw different graphs  based on the varied concepts asked. Practice drawing distance-time graphs, displacement-time graphs, velocity-time graph in different states of motion.

Chapter 9: Force and Law of Motion

Learn the definitions of inertia, mass and Newton’s laws of motion as part of the higher order analytical questions. Practical applications of Law of Conservation of momentum like collision, recoil of a pistol etc are mostly asked.

Chapter 10: Gravitation

Brush up your concepts on Gravitation as you can face theoretical questions like difference in mass and weight, law of gravitation with its formula, concept of gravity and it acceleration in the exam.

Chapter 11 – Work and Energy

  • Work
  • Potential Energy
  • Kinetic Energy
  • Power and Commercial Units

Method for Quick Understanding:

  • We require energy to do our daily activities, or work but according to science, work is defined in quite a different manner. Here, work is defined as product of force and displacement or it is said to be done when an object is displaced in the direction of applied force.
  • An object which is capable of doing work posses energy. The energy possessed by an object due to its motion is kinetic energy. The energy possessed by an object due to its position is known as potential energy. The sum of kinetic and potential energy is known as mechanical energy.
  • According to law of conservation of energy, energy is always transferred from one form to another and is always same before and after transformation. Power is the rate of doing work.

Chapter 12 – Sound

  • Production and Propagation of Sound
  • Sound Waves & its Characteristics
  • Reflection of Sound
  • Sonar and other Applications of Sound
  • Structure of Human Ear

Method for Quick Understanding:

  • Sound is produced due to vibration of object or particles in the medium. It travels as longitudinal waves as a disturbance through a medium without the actual movement of the particles in the medium.
  • Sound waves follow the laws of reflection. Sound waves are associated with characteristics like wavelength, frequency and time period. quality of sound, pitch and loudness etc., depends on the same characteristics.
  • The audible range of sound for human is 20 Hz – 20 KHZ. The sound waves with frequency higher than audible range is ultrasonic and lower than audible range is infrasonic.
  • Sonar is used to determine the depth of sea and sea hill etc.

Chapter 13 – Why do we fall ill

  • Definition of health
  • Difference between healthy and disease-free, acute and chronic diseases, and infectious and noninfectious diseases
  • Causative agents of sleeping sickness, kala-azar, ascariasis and AIDS
  • Brief note on AIDS
  • Treatment and prevention of common diseases

Method for Quick Understanding:

  • The difference between infectious and noninfectious diseases. Causative agents of some of the most common diseases.

Chapter 14 – Natural Resources 

  • Air and water pollution
  • Biogeochemical cycles
  • Greenhouse effect and ozone layer depletion

Chapter 15: Improvement in food resources

The following topics most surely appear in both short or long answer type sections. Focus on the principle of Plant Breeding for

  • Disease Resistance ,
  • Developing Resistance to Insect Pests and
  • Improved Food Quality

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