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CBSE Class 9 Sample Papers, Syllabus, Test Papers & NCERT Solutions

NCERT Solutions for Class 9 Science Chapter 8 – Motion

Questions From NCERT Textbook for Class 9 Science Question 1: An athlete completes one round of a circular track of diameter 200 m in 40 s. What will be the distance covered and the displacement at the end of 2 minutes 20 s? ANSWER: Diameter of a circular track, d = 200 m Radius of […]

NCERT Solutions for Class 9 Science Chapter 10 Gravitation

Questions From NCERT Textbook for Class 9 Science Question 1: How does the force of gravitation between two objects change when the distance between them is reduced to half? ANSWER: According to the universal law of gravitation, gravitational force (F) acting between two objects is inversely proportional to the square of the distance (r) between […]

NCERT Solutions For Class 9 Science Chapter 15 Improvement in Food Resources

Questions From NCERT Textbook for Class 9 Science Question 1. Explain any one method of crop production which ensures high yield. Answer: One method used for crop production which ensures high yield is plant breeding. It is the science involved in improving the varieties of crops by breeding plants. The plants from different areas/places is […]

NCERT Solutions for Class 9 Science Chapter 14 Natural Resources

Questions From NCERT Textbook for Class 9 Science Question 1. Why is the atmosphere essential for life? Answer: Atmosphere is essential for life because of the following masons : (i) It keeps the average temperature of the earth fairly steady during the day and even during the course of the whole year. (ii) It prevents […]

NCERT Solutions for Class 9 Science Chapter 13 Why Do We Fall Ill

Questions From NCERT Textbook for Class 9 Science Question 1. How many times did you fall ill in the last one year? What were the illnesses? (a) Think of one change you could make in your habits in order to avoid any of/ most of the above illnesses. (b) Think of one change you would […]

NCERT Solutions for Class 9 Science Chapter 12 Sound

Questions From NCERT Textbook for Class 9 Science 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. Question 3. Cite an experiment to show that sound needs a material medium for its propagation. […]

NCERT Solutions for Class 9 Science Chapter 11 Work Power and Energy

Questions From NCERT Textbook for Class 9 Science 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 wind mill is […]

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion

Questions from NCERT Textbook for Class 9 Science 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 a reason. Answer: […]

NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms

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 dependency on other organisms. 4. Helps in cross breeding and genetic […]

NCERT Solutions For Class 9 Science Chapter 6 Tissues

Questions From NCERT Textbook for Class 9 Science 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 of vessels, trachieds, […]

NCERT Solutions For Class 9 Science Chapter 5 The Fundamental Unit of Life

Questions From NCERT Textbook for Class 9 Science 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 poorly defined, the […]

NCERT Solutions for Class 9 Science Chapter 4 Structure of Atom

Questions from NCERT Text Book Question 1. Compare the properties of electrons, protons and neutrons. Answer: Question 2. What are the limitations of J.J. Thomson’s model of the atom? Answer: According to J.J. Thomson’s model of an atom, the electrons are embedded all over in the positively charged spheres. But experiments done by other scientists […]

NCERT Solutions For Class 9 Science Chapter 3 Atoms and Molecules

Questions From NCERT Textbook for Class 9 Science 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 […]

NCERT Solutions For Class 9 Science Chapter 2 Is Matter Around Us Pure

Questions From NCERT Textbook for Class 9 Science 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) […]

NCERT Solutions For Class 9 Science Chapter 1 Matter in Our Surroundings

Questions From NCERT Textbook for Class 9 Science 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. […]

NCERT Solutions 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 Diversity in Living Organisms Chapter 8 Motion Chapter 9 Force and Laws of Motion Chapter 10 Gravitation Chapter 11 […]