Science is an important subject in a student’s life. The understanding of this subject determines whether you want to choose Science, Commerce or Arts stream, in your class 11.
CBSE Class 10 Science is mainly classified into Physics, Chemistry, and Biology. However, the NCERT Textbook offers all the chapters combined in a single book.
Students are often worried about the weightage of the chapters so that they can work on the topics that are more likely to appear in the CBSE Board Examination. Most of the students start their preparation a little later than expected. However, every student must know the blueprint of the syllabus, the difficulty level of the questions, the question paper pattern, and the important topics to focus on.
The CBSE Board Exam for Science carries 100 marks. 80 marks will be for theory assessment and the rest 20 marks are allotted for internal assessment. There will be a total of 36 questions with different levels and types of questions. There will be four sections in the exam namely A, B, C, & D. The students need to complete the entire paper in 3 hours.
From Section B onwards, students have to choose between some questions.
Below mentioned is the unit-wise weightage of the marks according to the CBSE Board.
|
Unit No. |
Unit Name | Weightage of the marks |
| 1 | Chemical Substances – Nature and Behavior | 25 |
| 2 | World of Living | 23 |
| 3 | Natural Phenomena | 12 |
| 4 | Effects of Current | 13 |
| 5 | Natural Resources | 7 |
| Total Marks | 80 |
Each of these units has different chapters. Hence, the total weightage of each unit gets distributed among its constituent chapters.
Below mentioned are the chapters from the Chemistry section.
| Name of the chapter | Total marks | Important topics |
| Chemical Reaction and Equation | 05-Jul | Different types of reactions |
| Balancing the given equations | ||
| Reactivity series of the metals | ||
| Definition of the terms | ||
| Acids, Bases and Salts | 05-Jul | Neutralization reaction |
| The reaction of acids and bases with different metals and metal oxides | ||
| The reaction of non-metallic oxides with bases and reaction of metal carbonate with acids | ||
| Carbon and its Compounds | 06-Aug | Reactions of ethanol and ethanoic acid |
| Properties of ethanol and ethanoic acid | ||
| Applications of carbon and its compounds | ||
| IUPAC Nomenclature |
The above-mentioned chapters have the highest weightage of marks in the chemistry section. Do not forget to revise the important topics mentioned by your teachers. Solve previous year question papers to pick the equations of balancing the equations or reactions and try to find the IUPAC Nomenclature of the elements or compounds.
Below mentioned are the important chapters from the Physics section.
| Name of the chapter | Total marks | Important topics |
| Electricity | 7 | Ohm’s law and its applications |
| The symbols used to denote the elements in the circuit | ||
| Combination of resistors-Series and Parallel | ||
| Problems on the combination of resistors | ||
| Heating effects | ||
| Magnetic Effects of Electric Current | 6 | Different types of Magnetic field lines |
| Magnetic field lines around the circular loop and straight long wire | ||
| Right-hand thumb rule | ||
| Flemings left-hand and right-hand rules | ||
| Electromagnetic induction | ||
| Motors, generators and electric dynamo | ||
| Light, Reflection and Refraction | 7 | Formulae related to mirror, lens and refractive index |
| Laws of reflection and refraction | ||
| Glass slab | ||
| Problems on the formulae mentioned above |
The above-mentioned chapters have the highest weightage of marks in the Physics section. Solve as many problems using the formulae to get a handle on the subject. Do not forget to check the previous year question papers for the difficulty level of the problems. Contact your teachers if you have doubts about solving the problems.
Below mentioned are the important chapters from the Biology section.
| Name of the chapter | Total marks | Important topics |
| Life Processes | 08-Sep | Nutrition in Plants and Humans |
| Excretion | ||
| Transportation in plant | ||
| Respiration | ||
| Exchange of gases | ||
| Dialysis | ||
| Control and Coordination | 05-Jul | The nervous system in animals |
| Structure and function of a neuron | ||
| Coordination in plants and animals | ||
| Types of glands, name of the secretions and their functions | ||
| How do Organisms Reproduce? | 05-Jul | Importance of asexual and sexual production in the evolution |
| Types of asexual reproduction and their examples | ||
| Reproduction in plants and humans | ||
| The reproductive system of male and female | ||
| Contraceptive Methods | ||
| Heredity and Evolution | 05-Jul | Law of independence, dominance and independent assortment |
| Mendel’s dihybrid and monohybrid cross | ||
| Human evolution | ||
| Sex Determination | ||
| Blood groups | ||
| Homologous and analogous organ |
The above-mentioned chapters have the highest weightage of marks in the biology section. Do not forget to learn the diagrams. Go through previous year’s question papers for more important questions.
In the NCERT Textbooks, all the diagrams are important from all the three sections of Biology, Physics, and Chemistry.
Try to get the NCERT solutions for class 10 science and be thorough with the NCERT textbook. This book is enough to score high in your 10th standard science exam.
Few tips to follow to get more marks in your CBSE Board exams are:
If you are going to choose Science as the stream for classes 11 and 12, the concepts taught in 10th standard Science are important to study and learn. Attempt the sample papers uploaded by the CBSE Board on their official websites and mock tests.