CBSE 10th Science Important Topics 2025: Score 65+ Marks Easily

List of Important Chapters for Class 10 Science Board Exam

Physics:

1. Light – Reflection and Refraction

   • Laws of Reflection

   • Refraction of Light by Spherical Lenses

   • Refraction through Prism

   • Dispersion of Light

   • Defects of Vision and Their Correction

2. Electricity

   • Electric Current and Circuit

   • Ohm’s Law

   • Resistance and Resistivity

   • Electric Power

3. Magnetic Effects of Electric Current

   • Magnetic Field and Field Lines

   • Electromagnetic Induction

   • Electric Generator and Motor

4. Sources of Energy

   • Conventional Sources of Energy

   • Non-conventional Sources of Energy

   • Environmental Consequences

Preparation strategy for the Physics exam:

1. Regularly practice ray diagrams for mirrors and lenses with proper arrow indications and labelling.

2. Solve numerical problems without using any short tricks and always write the correct unit in the answer.

3. Solve NCERT-based examples for circuit diagrams and resistance calculations in series/parallel.

4. Memorize all the definitions, laws, and derivations. Practice them by writing.

5. Make separate notes for formulas, and unit conversion for last-minute revision.

Chemistry:

1. Chemical Reactions and Equations

   • Types of Chemical Reactions

   • Balancing Chemical Equations

   • Corrosion and Rancidity

2. Acids, Bases, and Salts

   • pH Scale

   • Indicators

   • Chemical Properties of Acids and Bases

3. Metals and Non-Metals

   • Physical and Chemical Properties

   • Reactivity Series

   • Extraction of Metals

4. Carbon and Its Compounds

   • Structural Isomerism

   • Nomenclature

   • Chemical Properties of Carbon Compounds

Preparation strategy for the Chemistry exam:

1. Practice solving and balancing chemical equations.

2. Understand different types of reactions: combination, decomposition, displacement, double displacement, and redox reactions.

3. Study the preparation and uses of important salts (e.g., washing soda, baking soda, plaster of Paris).

4. Understand Mendeleev’s periodic table and its limitations.

Biology:

1. Life Processes

   • Nutrition

   • Respiration

   • Transportation

2. Control and Coordination

   • Nervous System

   • Endocrine System

   • Reflex Action

3. Heredity and Evolution

   • Mendel’s Laws of Inheritance

   • Evolution by Natural Selection

   • Evidence of Evolution

4. Reproduction

   • Modes of Reproduction

   • Sexual Reproduction

Preparation strategy for the Biology exam:

1. Regularly practice labeled diagrams of the human heart, nephron, stomata, brain, and digestive system every day.

2. Make sure you follow the arrows as shown while correctly naming all parts.

3. Use flowcharts for clarity on topics like hormonal control and heredity.

4. Understand all NCERT questions plus exercise problems and sample examples.

5. Write long answers systematically with headings, subheadings, and diagrams where applicable.

General Preparation Tips for CBSE Class 10 Board Exams

• Complete the syllabus thoroughly and highlight important topics for effective revision.

• Understand the unit-wise weightage and identify the frequently asked topics

• Focus on basic core concepts to get a strong foundation. Focus on topics like laws of motion, electricity, and light in physics, acids, bases, salts, and carbon compounds in chemistry, and human anatomy, heredity, and reproduction in biology.

• Practice the numerical problems regularly. Use previous years’ question papers and mock tests for a better understanding of the numerical question pattern.

• Focus on diagrams and labelling as they can fetch marks easily.

• Practice sample papers under the same exam conditions to work on time management.

• Focus on the typology of questions asked in the exam

• Keep notes of important laws and formulas.