The NCERT Solutions for Class 9 Science are designed in a way to make students learn the fundamentals of Physics, Chemistry, and Biology. They include all important chapters such as Matter in Our Surroundings, Motion, and Atoms and Molecules based on the new CBSE syllabus. The NCERT Solutions are provided in easy language so that students can easily learn and solve problems. These tools prove to be handy in doing assignments, quick revision, and exam preparation. They also help in laying a solid foundation for higher studies and competitive exams.
This Story also Contains
- NCERT Solutions for Class 9th Science Chapter Wise
- Chapter Wise Weightage for Class 9th Science
- Key Features of NCERT 9th Class Science Solutions
NCERT Solutions for Class 9 Science In these solutions, you will get detailed answers to all the questions in your NCERT books. You can score good marks in your exams if you use these solutions. They describe each chapter step by step so that Science is easy to learn. With the help of these NCERT Solutions for Class 9 Science, you will have more confidence and will perform better at school and other exams.
Also Read:
NCERT Solutions for Class 9th Science Chapter Wise
Chapter-wise NCERT Solutions for Class 9 Science are available in PDF format, offering comprehensive guidance and explanations for all topics. These Class 9 Science Solutions are carefully curated to help students understand complex problems easily and excel in their NCERT Science Class 9 exams. By utilising these PDFs, students can enhance their knowledge, boost problem-solving skills, and achieve academic success in Class 9 Science. Below are the Chapter-wise solutions:
A short context of what each chapter contains is described below:
Chapter 1: Matter in Our Surroundings
The first chapter in Class 9 Science, "Matter in Our Surroundings," talks about what matter is and how it behaves. Everything around us, whether it’s air, water, or even a rock, is made of matter. It takes up space and has some mass. Students learn that matter is made of tiny particles which keep moving and have space between them. Based on how these particles are packed and how they move, matter is seen in three forms: solid, liquid, and gas. The chapter also explains how matter can change from one state to another with the help of heat or pressure. Evaporation is also explained thoroughly. It happens from the surface of liquids even before boiling, and also causes cooling. All the exercise questions are solved clearly in the NCERT Solutions, which helps students revise and understand the topic better.
Topics Covered in Class 9 Science Chapter 1
- Matter in Our Surroundings
- Physical Nature of Matter
- Characteristics of Particles of Matter
- States of Matter
- Can Matter Change Its State?
- Evaporation
Also, Check
Chapter 2: Is Matter Around Us Pure
This chapter of the NCERT Class 9 Science Solutions is an extension of the basic concept of "Mixture" studied in the lower classes. It covers topics such as pure substances, various types of solutions (homogeneous and heterogeneous), properties of solutions, mixtures, suspensions, and colloids present in our surroundings. Additionally, Methods of separation, crystallisation and evaporation are explored to separate mixtures into pure substances using appropriate techniques. The solutions in this chapter also include solved numerical problems for better understanding and practice.
Topics Covered in Class 9 Science Chapter 2
Types of mixtures: homogeneous and heterogeneous
What are solutions, suspensions, and colloids
Properties and examples of each mixture
Easy methods to separate mixtures
Getting colour from ink using evaporation
Separating cream from milk using centrifugation
Using funnels to separate two liquids
Distillation to separate mixed liquids
Physical and chemical changes
Pure substances: elements and compounds
Types of elements:metals, non-metals, metalloids
Also, Check -
Chapter 3: Atoms and Molecules
In Class 9 Science, the chapter on "Atoms and Molecules" introduces students to molecules, which are electrically neutral groups formed by chemical bonds between two or more atoms. The chapter covers various types of molecules, including molecules of elements and compounds. Students also learn about fundamental concepts such as the law of mass and energy conservation, the law of constant proportion, and Dalton's atomic theory.
CBSE NCERT solutions for Class 9th Science provide in-depth learning on how to write the chemical formula of a molecular compound, understand the mole concept, and calculate the molecular mass of compounds. Additionally, students explore polyatomic ions, which are clusters of atoms that act as ions. These solutions help students grasp complex concepts, enhance problem-solving skills, and excel in their academic journey.
Topics Covered in Class 9 Science Chapter 3
Laws of Chemical Combination
Law of Conservation of Mass
Law of Constant Proportions
What are atoms and their modern symbols
Atomic mass and how it is calculated
Idea of molecules: of elements and compounds
What are ions: cations and anions
How to write chemical formulae
Formulae of simple compounds
Molecular mass and formula unit mass
Mole concept and basic numerical problems on it
Also, Check -
Chapter 4: Structure of The Atoms
In the previous chapter, you studied molecules, which are groups of atoms. Now, you will delve into atoms and their structure. An atom is the smallest, indivisible component of an element. It consists of three sub-atomic particles: protons (positively charged), electrons (negatively charged), and neutrons (electrically neutral). CBSE NCERT solutions for Class 9 Science Chapter 4 also introduce different models of an atom proposed by various scientists. By studying this chapter, you will gain a deeper understanding of the fundamental building blocks of matter and their intricate structure.
Topics Covered in Class 9 Science Chapter 4
Charged particles present in matter
Basic idea of the structure of an atom
Thomson’s model of the atom
Rutherford’s model of the atom
Bohr’s model of the atom
Neutrons and their discovery
How electrons are arranged in shells (K, L, M…)
Valency and how to find it
Atomic number and mass number
Concept of isotopes with examples
What are isobars, and how do they differ from isotopes
Also, Check -
Chapter 5: The Fundamental Unit of Life
In this Biology chapter, students will study the significance of cells as the fundamental unit of life. The chapter explores the structure and functions of cells, including their membranes, cell walls, nucleus, cytoplasm, endoplasmic reticulum, Golgi apparatus, lysosomes, mitochondria, plastids, vacuoles, and cell division. Additionally, students will learn about the impact of hypotonic, hypertonic, and isotonic solutions on cells. The focus of the chapter is on understanding the structural organisation of cells, both in plant and animal cells, highlighting their crucial role in the organisation of living organisms.
Topics Covered in Class 9 Science Chapter 5
- What living things are made of
- Structure and function of a cell
- Plasma membrane and its role
- The cell wall in plant cells
- Nucleus and its parts
- Cytoplasm and what it does
- Cell organelles and their functions:
- Endoplasmic reticulum (smooth and rough)
- Golgi apparatus
- Lysosomes
- Mitochondria
- Plastids (only in plant cells)
- Vacuoles
- Importance of each cell part in keeping the cell working properly
Also, Check -
Chapter 6: Tissues
In the previous chapter, you have already learned that in unicellular organisms, all functions are performed by single cells, but in multicellular organisms, cells are specialised to carry out specific functions. Cells that specialise in one function are grouped together, and this cluster of cells is called a tissue. This cluster of cells is arranged and designed so as to give the highest possible efficiency of function. The tissue is a group of cells similar in structure and function. Plant cells and animal cells are different from each other. Plant tissues are of two main types: meristematic and permanent, and animal tissues can be epithelial, connective, muscular, and nervous. Here, you will study different types of tissues, such as goblet cells, stem cells, etc. If you are having trouble solving exercise questions, go through the NCERT Solutions for Class 9 Science Chapter 6.
Topics Covered in Class 9 Science Chapter 6
What are tissues
Plant tissues: meristematic and permanent
Simple permanent tissue
Complex permanent tissue: xylem and phloem
Animal tissues: epithelial, connective, muscular, nervous
Use of tissues in plants and animals
Also, Check -
Chapter 7: Motion
In our surroundings, we see some objects at rest and some in motion. We say an object is in motion when its position changes with time. Flying birds, swimming fish, and moving cars are some examples of motion. Atoms, molecules, planets, stars, and galaxies are all in motion. It can be described in terms of the distance moved or the displacement. In the Class 9 Science NCERT Solutions of this chapter, you will study displacement, different types of motion, uniform motion, non-uniform motion, circular motion, speed, velocity, acceleration, etc. The motion of an object could be uniform or non-uniform, depending on whether its velocity is constant or changing.
Topics Covered in Class 9 Science Chapter 7
- What is motion
- Uniform and non-uniform motion
- Speed and how to measure it
- Velocity and acceleration
- Distance-time and velocity-time graphs
- Equations of motion
- Graphical method to derive equations
- Uniform circular motion
Also, Check
Chapter 8: Force and Laws of Motion
In the previous chapter, you have already learned about different types of motion. Now the question is: what causes the motion? Why does the speed of an object change with time? Do all motions require a cause? What is the nature of this cause? In the solutions of this chapter, you will get the answers to all these questions. In this chapter, you will study three laws of motion that are given by Newton (Newton's law of motion), Galileo's concept of momentum, the rate of change of momentum, the net force on a body, etc. In the CBSE NCERT solutions of class 9 science, you will learn the applications of Newton's law of motion.
Topics Covered in Class 9 Science Chapter 8
- Balanced and unbalanced forces
- First law of motion: inertia
- Concept of mass
- Second law of motion: relation between force, mass and acceleration
- Third law of motion: action and reaction
- Law of conservation of momentum
- Use of these laws to understand motion in real life
Also, Check -
Chapter 9: Gravitation
In the previous chapter, you have already learned about the motion of objects and the force on the object as the cause of motion. You know that force is needed to change the speed or direction of motion of an object. You must have observed that an object dropped from a height falls towards the earth. So, there must be a force exerted by the Earth on the object that attracts it toward it. This force is called the gravitational force. Any two masses placed at a certain distance will experience gravitational force, but it is a weak force unless large masses are involved. A gravitational force is always an attractive force between two masses. In the NCERT Class 9 Science Solutions, you will learn more about the gravitational force and how to calculate it. Here, you will learn that the force of gravity decreases with altitude. It also varies on the surface of the Earth, decreasing from the poles to the equator.
Topics Covered in Class 10 Science Chapter 9
- Universal Law of Gravitation
- What is free fall, and the value of “g”
- Motion of objects under gravity
- Mass and weight: and how they are different
- Weight of objects on the Moon
- Thrust and pressure
- Pressure in liquids
- Buoyancy: why things float or sink
- Archimedes’ Principle
- Relative density and its use
Also, Check -
Chapter 10: Work and Energy
We need the energy to perform any activity like playing, singing, reading, writing, thinking, jumping, cycling or running. All living beings get this energy from food. Machines need fuel as energy to perform any activity. Work done on an object is defined as the magnitude of the force multiplied by the distance moved by the object in the direction of the applied force. In this chapter, you will learn the concept of work and energy, the relation between work and energy, and different forms of energy (potential and kinetic energy). In the solutions to the NCERT for class 9 science, you will learn some applications of work and energy. The unit of work is joule: 1 joule = 1-newton × 1 metre.
Topics Covered in Class 10 Science Chapter 10
- What is work in science
- Work done by a constant force
- Meaning and types of energy
- Potential energy and its relation to height
- Conversion of energy from one form to another
- Law of conservation of energy
- Power: rate of doing work
- Commercial unit of energy (kilowatt-hour)
- Daily life examples of work and energy
Also, Check -
Chapter 11: Sound
We hear sounds from various sources like humans, birds, bells, machines, vehicles, televisions, radios, mobiles, etc. In the previous chapter, you have already learned about mechanical energy. Sound is another form of energy, like mechanical energy, light energy, which produces a sensation of hearing in our ears. Sound is produced due to the vibration of different objects. In the NCERT Class 9 Science Solutions of this chapter, you will learn that the energy of the sound travels and not the particles of the medium for the propagation of the sound. It will cover sound production, propagation of sound, properties, and characteristics of the sound wave, speed of sound in different media, reflection of the sound wave, multiple reflections of the sound wave, applications of multiple reflections, reverberation, and application of ultrasound.
Topics Covered in Class 10 Science Chapter 11
- How sound is produced
- How sound travels through a medium
- Sound waves are longitudinal
- Characteristics of a sound wave
- Reflection of sound
- Echo and reverberation
- Uses of multiple reflections of sound
- Human hearing range
- Ultrasound and its uses
- Use of sonar in real life
Also, Check -
Chapter 12: Improvement in Food Resources
As you know, India is a very populous country, and we are still growing. As the population is growing, we need more food. As India is already intensively cultivated, there is no scope for increasing the area of cultivation. Therefore, the only way to increase our production is through the efficiency of crop production and livestock. With the green revolution, we have increased our food production. In the solutions of NCERT for class 9 science of this chapter, you will study the improvements that are required in our food resources. In this chapter, you will also study different types of cultivation of crops for food purposes, like horticulture, pisciculture, etc. Find answers to all your queries from the exercise in the NCERT Solutions for Class 9 Science Chapter 12.
Topics Covered in Class 10 Science Chapter 12
- Ways to increase crop yield
- Crop variety improvement
- Crop production and protection methods
- Animal husbandry basics
- Cattle farming techniques
- Poultry farming
- Fish production: inland and marine fisheries
- Better practices for food resource management
Also, Check -
Chapter Wise Weightage for Class 9th Science
Having an idea of the chapter-wise weightage is important for efficient preparation and time management during exams based on the previous year paper analysis, certain chapters, such as motion, force and laws of motion, diversity in living organisms, definitely carry more marks. This helps students prioritise high-scoring topics with a balanced coverage of the entire syllabus.
Chapter Name | Approx. Weightage (%) |
1. Matter in Our Surroundings | 6–8% |
2. Is Matter Around Us Pure | 6–8% |
3. Atoms and Molecules | 6–7% |
4. Structure of the Atom | 7–8% |
5. The Fundamental Unit of Life | 8–10% |
6. Tissues | 6–8% |
7. Motion | 9–10% |
8. Force and Laws of Motion | 10–12% |
9. Gravitation | 7–8% |
10. Work and Energy | 9–10% |
11. Sound | 6–8% |
12. Improvement in Food Resources | 4–5% |
NCERT Books and NCERT Syllabus:
Key Features of NCERT 9th Class Science Solutions
The NCERT Class 9 Science Solutions give full coverage of all exercise questions from the textbook. So students can easily practice each question with step-by-step answers. This helps in better understanding and makes revision easier, too.
- Along with textbook questions, these solutions also have extra questions, exemplar problems, and important ones picked from sample and previous year papers. These help students to try different types of questions and get more confident for exams.
- The best part is that all these solutions are available in PDF form. So students can download and read them anytime on their phone or laptop, even when there’s no internet.
- Also, wherever needed, diagrams are given with the answers. These pictures help a lot in understanding the concept, especially for tricky topics. Visuals make learning simpler and more interesting.
NCERT Solutions: Class-wise
