Science Class 9 Solutions, MCQ, Notes, Book FREE PDF Download

Solutions For All Chapters Science Class 9 Questions From NCERT Textbook Question 1. What is sound and how is it produced ? Answer: Sound is mechanical energy which produces a sensation of hearing. When an Object is set into vibrations, sound is produced. 2. Describe with the help of a diagram, how compressions and rarefactions are […]

Work and Energy Science Class 9 Chapter 10 Question & Answer

Solutions For All Chapters Science Class 9 Questions From NCERT Textbook Q1. Look at the activities listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’. (a) Suma is swimming in a pond. (b) A donkey is carrying a load on its back. (c) A […]

Force & Laws of Motion Science Class 9 Chapter 8 Question Answer

Solutions For All Chapters Science Class 9 Questions from NCERT Textbook Question 1. An object experiences a net zero external unbalanced force. Is it possible for the object to be travelling with a non-zero velocity? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide […]

Science Class 9 Chapter 7 Question Answer

Diversity in Living Organisms Solutions For All Chapters Science Class 9 Questions From NCERT Textbook for Class 9 Science Question 1. What are the advantages of classifying organisms? Answer: Advantages of classification: 1. Better categorization of living beings based on common characters. 2. Easier study for scientific research. 3. Better understanding of human’s relation and […]

Tissues Science Class 9 Chapter 6 Question Answer

Solutions For All Chapters Science Class 9 Questions From NCERT Textbook Question 1. Define the term “tissue”. Answer: Group of cells that are similar in structure and perform same function is called a tissue. Question 2. How many types of elements together make up the xylem tissue? Name them. Answer: The xylem is made up […]

The Fundamental Unit of Life Science Class 9 Chapter 5 Question Answer

Solutions For All Chapters Science Class 9 Questions From NCERT Textbook Question 1. Make a comparison and write down ways in which plant cells are also different from animal cells. Answer: Question 2. How is prokaryotic cell different from a eukaryotic cell? Answer: Prokaryotic cell is generally smaller in size (1-10 pm), nuclear region is […]

Atoms and Molecules Science Class 9 Chapter 3 Question Answer

Solutions For All Chapters Science Class 9 Question 1. A 0.24 g sample of compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight. Answer: Boron and oxygen compound —> Boron + Oxygen 0.24 g —> […]

Is Matter Around Us Pure Science Class 9 Chapter 2 Question Answer

Solutions For All Chapters Science Class 9 Question 1. Which separation techniques will you apply for the separation of the following? (a) Sodium chloride from its solution in water. (b) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride. (c) Small pieces of metal in the engine oil of a car. (d) Different […]

Matter in Our Surroundings Science Class 9 Chapter 1 Question Answer

Solutions For All Chapters Science Class 9 Question 1. Convert the following temperatures to the Celsius scale. (a) 293 K (b) 470 K. Answer: (a) 293 K into °C 293 – 273 = 20°C (b) 470 K into °C 470 – 273 = 197°C Question 2. Convert the following temperatures to the Kelvin scale. (a) […]

Science Class 9 Question & Answer

Chapter 1 – Matter in Our Surroundings Chapter 1 class 9 Science Chapter 2 – Is Matter Around Us Pure Chapter 2 class 9 Science Chapter 3 – Atoms and Molecules Chapter 3 class 9 Science Chapter 4 – Structure of the Atom Chapter 4 class 9 Science Chapter 5 – The Fundamental Unit of […]

Science Class 9 NCERT Book PDF Download

NCERT Book for Class 9 Science 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 – The Fundamental Unit of Life Chapter 6 – Tissues Chapter 7 – Motion Chapter 8 – Force and […]

Notes Class 9 Science

Chapter 1 Matter in Our Surroundings Class 9 Notes Chapter 2 Is Matter Around Us Pure Class 9 Notes Chapter 3 Atoms and Molecules Class 9 Notes Chapter 4 Structure of the Atom Class 9 Notes Chapter 5 The Fundamental Unit of Life Class 9 Notes Chapter 6 Tissues Class 9 Notes Chapter 7 Motion Class 9 Notes Chapter 8 Force and Laws of Motion Class 9 […]

Notes Class 9 Science Chapter 12 Improvement in Food Resources

Notes For All Chapters Science Class 9 1. Why Do We Need to Improve Food Resources? All living things need food to grow and stay healthy. Our food gives us carbohydrates, proteins, fats, vitamins, and minerals. We get food mainly from plants (agriculture) and animals (animal husbandry). India’s population is very large and still growing […]

Notes Class 9 Science Chapter 14 Natural Resources

Notes For All Chapters Science Class 9 Facts that Matter Life exists on earth due to its ambient temperature, water, food and energy from the sun. Lithosphere: The outer crust of the earth is called the lithosphere. Hydrosphere: Sum of all water bodies is called hydrosphere. Atmosphere: Air that covers the earth is called the […]

Notes Class 9 Science Chapter 13 Why Do we Fall ill

Notes For All Chapters Science Class 9 Facts that Matter Introduction Health is a state of complete physical, mental and social well-being. Basic conditions for good health: Proper balanced and nutritious diet. Personal hygiene. Clean environment and surroundings. Healthy air, no pollution in the surrounding. Regular exercise. Proper rest. Good standard of living and economic […]

Notes Class 9 Science Chapter 11 Sound

Notes For All Chapters Science Class 9 Introduction → The sensation felt by our ears is called sound. → Sound is a form of energy which makes us hear. → Law of conservation of energy is also applicable to sound. → Sound travels in form of wave. Production of Sound → Sound is produced when […]

Notes Class 9 Science Chapter 10 Work, Power and Energy

Notes For All Chapters Science Class 9 1. Introduction Every living being needs energy for daily activities like playing, reading, running, etc. Energy for life processes comes from food. Machines and living beings both need energy to perform work. In this chapter, we study Work, Energy, and Power — three closely related concepts. 2. WORK […]

Notes Class 9 Science Chapter 9 Gravitation

Notes For All Chapters Science Class 9 1. Introduction → Gravitational Force of Earth: If we release a small stone without pushing it from a height, it accelerates towards earth. → The stone is when accelerated towards earth, means some force is acting on it. The force which pulls the objects towards the centre of […]

Notes Class 9 Science Chapter 8 Force and Laws of Motion

Notes For All Chapters Science Class 9 1. Introduction Force: Force is a push, pull, or hit that can: Change the state of motion of an object (speed up or slow down) Change the direction of motion Change the shape or size of an object Effects of Force: Pushing a trolley moves it forward. Pulling […]

Notes Class 9 Science Chapter 7 Motion

Notes For All Chapters Science Class 9 1. Introduction to Motion 1.1 What is Motion? Motion means a change in the position of an object with time. Everything around us moves in some way: Birds fly in the air. Fish swim in water. Cars move on roads. Blood flows through veins and arteries. Planets, stars, […]

Notes Class 9 Science Chapter 7 Diversity in Living Organisms

Notes For All Chapters Science Class 9 Facts that Matter Diversity: This earth is full of organisms of various shapes and sizes. The largest Phylum of animal kingdom alone contains over a million species. There are varieties of plants, right from small grasses to tall Eucalyptus trees. This variety in living beings is called diversity. Biodiversity: The […]

Notes Class 9 Science Chapter 6 Tissues

Notes For All Chapters Science Class 9 Introduction → A group of cells that are similar in structure and/or work together to achieve a particular function forms a tissue. → Most of the tissues in plants are supportive, which provides them with structural strength. → These tissues are dead, since dead cells can provide mechanical […]

Notes Class 9 Science Chapter 5 The Fundamental Unit of Life

Notes For All Chapters Science Class 9 CBSE 1. Discovery of the Cell Robert Hooke’s Observation (1665) Robert Hooke examined a thin slice of cork (the bark of a tree) using a self-designed microscope. He saw it resembled a honeycomb structure, made up of many tiny compartments. He called these compartments cells (from Latin cellula, […]

Notes Class 9 Science Chapter 4 Structure of the Atom

Notes For All Chapters Science Class 9 CBSE 1. Introduction Atoms and molecules are the fundamental building blocks of matter. The existence of different kinds of matter is due to different types of atoms. Scientists questioned: (i) What makes one atom different from another? (ii) Are atoms indivisible as Dalton proposed? Experiments showed that atoms […]

Notes Class 9 Science Chapter 3 Atoms and Molecules

Notes For All Chapters Science Class 9 CBSE 1. Introduction Ancient Indian philosopher Maharishi Kanad (around 500 BC) proposed that matter can be divided into smaller and smaller particles until we reach indivisible particles called Parmanu. Pakudha Katyayama further said these particles exist in combined forms to form different substances. Around the same time, Greek […]

Notes Class 9 Science Chapter 2 Is Matter Around Us Pure

Notes For All Chapters Science Class 9 CBSE Introduction When we see packets of milk, ghee, butter, salt, or juice labeled “pure,” we think pure means no adulteration. → Example: “Pure ghee” means no mixing of oil or impurities. Scientifically, “pure” means: → A substance made up of only one kind of particles (same in […]

Notes Class 9 Science Chapter 1 Matter in Our Surroundings

Notes For All Chapters Science Class 9 CBSE 1. Introduction Everything in the universe is made of matter. Matter: Anything that has mass and occupies space (volume). Examples: Air, water, food, stones, clouds, plants, animals, etc. Early Indian philosophers classified matter into five elements (Panch Tatva): Air, Earth, Fire, Sky, and Water. Modern classification: Based […]

Sound Science Class 9 Chapter 11 Question & Answer