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Important Questions For All Chapters – Science Class 9 Short Questions 1. What are the three main factors necessary to increase crop yield? Answer: The three main factors are crop variety improvement, crop production improvement, and crop protection management. 2. What are macro-nutrients? Answer: Nutrients required by plants in large quantities such as nitrogen, phosphorus, […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. What causes the production of sound? Answer: Sound is produced due to the vibrations of an object. 2. What type of wave is a sound wave? Answer: Sound waves are longitudinal waves. 3. Through which medium does sound travel fastest? Answer: Sound travels […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. What are the two essential conditions for work to be done? Answer: (i) A force should act on an object. (ii) The object must be displaced in the direction of the force. 2. Write the formula for work done. Answer: Work done (W) […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. What is gravitation? Answer: Gravitation is the force of attraction between any two objects in the universe. 2. Who discovered the universal law of gravitation? Answer: Sir Isaac Newton discovered the universal law of gravitation. 3. Write the formula for the universal law […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. What is force? Answer: A force is a push or pull on an object that can change its state of motion, direction, or shape. 2. What are balanced forces? Answer: Forces that are equal in magnitude but opposite in direction and do not […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. What is motion? Answer: Motion is a change in the position of an object with time. 2. What is the SI unit of speed? Answer: The SI unit of speed is metre per second (m/s). 3. Define displacement. Answer: The shortest distance measured […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. What is a tissue? Answer: A tissue is a group of cells similar in structure and function that work together to perform a specific activity. 2. Name the types of plant tissues. Answer: The two main types of plant tissues are meristematic tissue […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. Who discovered the cell? Answer: Robert Hooke discovered the cell in 1665 while examining a thin slice of cork through a self-designed microscope. 2. What is the basic structural and functional unit of life? Answer: The cell is the basic structural and functional […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. Who discovered the electron? Answer: J.J. Thomson discovered the electron. 2. What are canal rays? Answer: Canal rays are positively charged radiations discovered by E. Goldstein. 3. What is the charge and mass of a proton? Answer: A proton has a charge of […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. Who postulated that matter is made up of very small particles called ‘Parmanu’? Answer: Maharishi Kanad postulated that matter is made up of very small particles called ‘Parmanu’. 2. What is the Law of Conservation of Mass? Answer: The Law of Conservation of […]

Important Questions For All Chapters – Science Class 9 Short Questions 1. What is a pure substance? Answer: A pure substance is a form of matter that contains only one kind of particles having the same chemical nature throughout. It has uniform composition and definite properties. 2. What is a mixture? Answer: A mixture is […]