CBSE Class 9 Science and technology Sample Paper 3
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CBSE Class 9 Science and technology Sample Paper 2
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CBSE Class 9 Science and technology Sample Paper 1
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CBSE Class 9 Science and technology List of Experiments
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CBSE Class 9 Science and technology Design of Question Paper
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CBSE Class 9 Science and technology Categories of Practical Skills
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NCERT Solutions Class 9 Science Chapter 15 Improvement in Food Resources
Question 1: How do biotic and abiotic factors affect crop production? Answer: A variety of biotic factors such as pests, nematodes, diseases, etc. can reduce the net crop production. A pest causes damage to agriculture by feeding on crops. For example, boll weevil…
NCERT Class 9 Science Work And Energy
WORK AND ENERGY In the previous few chapters we have talked about ways of describing the motion of objects, the cause of motion and gravitation. Another concept that helps us understand and interpret many natural phenomena is ‘work’. Closely related to work are energy and…
NCERT Class 9 Science Work And Energy Questions
WORKAND ENERGY 1. When a body falls freely towards the earth, then its total energy (a) increases (b) decreases (c) remains constant (d) first increases and then decreases 2. A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In…
NCERT Class 9 Science Why Do We Fall Ill
WHY DO WE FALL ILL Activity _____________13.1 • We have all heard of the earthquakes in Latur, Bhuj, Kashmir etc. or the cyclones that attack the coastal regions. Think of as many different ways as possible in which people’s health would be affected by such a disaster if it…
NCERT Class 9 Science Why Do We Fall Ill Questions
WHY DO WE FALL ILL 1. Which one of the following is not a viral disease? (a) Dengue (b) AIDS (c) Typhoid (d) Influenza 2. Which one of the following is not a bacterial disease? (a) Cholera (b) Tuberculosis (c) Anthrax (d) Influenza 3. Which one of the following disease is not…
NCERT Class 9 Science Tissues
Tissues From the last chapter, we recall that all living organisms are made of cells. In unicellular organisms, a single cell performs all basic functions. For example, in Amoeba, a single cell carries out movement, intake of food and respiratory gases, respiration and…
NCERT Class 9 Science Tissues Questions
TISSUES 1. Which of the following tissues has dead cells? (a) Parenchyma (b) Sclerenchyma (c) Collenchyma (d) Epithelial tissue 2. Find out incorrect sentence (a) Parenchymatous tissues have intercellular spaces (b) Collenchymatous tissues are irregularly thickened at corners…
NCERT Class 9 Science The Fundamental Unit Of Life
THE FUNDAMENTAL UNIT OF LIFE While examining a thin slice of cork, Robert Hooke saw that the cork resembled the structure of a honeycomb consisting of many little compartments. Cork is a substance which comes from the bark of a tree. This was in the year 1665 when Hooke made…