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Biology, chapter 1 Crop production and Management Why do we need food? Define Agriculture? Agriculture is applied science that deals with mass production of crop plants and animals used for human beings. What are the other means of food production apart from agriculture?? Why Crop production is essential? To fulfil…
Class 8 Chemistry Chapter 3: Synthetic Fibres and Plastics 1. Define Fibre? Fibre is a strong and flexible thread like material that is used to make fabric. It is used to make ropes and nets and several household items. 2.What are the two types of Fibres? Natural fibres are of…
CH-4 Materials: Metals & Non metals 1. Define Matter? 2. Define Element? 3.How are Elements classified? 4. Define Ores? 5.What is Gangue ? In Ores, there are certain impurities present along with metallic minerals. These impurities are called as Gangue. 6.Define Metallury ? The series of processes carried out to…
Class 8, Physics We shall study about Lightning and Earthquake in detail Lightning Lightning occurs because of the massive electric charge flowing from clouds, from one part of cloud to another or from a cloud to ground. Electrostatic Force: Rubbing a comb against dry hair / rubbing a balloon against…
Coal & Petroleum. 1. What are Natural Resources? 2. How are Natural resources classified? Depending on abundance and availability they are classified into Exhaustible Natural resources and Inexhaustible natural resource. Inexhaustible Natural Resources Exhaustible Natural Resources These are present in unlimited quantity in nature. These resources are present in limited…
Few Important terms: Define Puberty?? What are the changes that takes place due to Puberty and Adolescence?? Increase in Height Change in the body shape: During Puberty, both boys and girls undergo changes in the body shape. Boys Girls Shoulders become broader and chest becomes wider. Hips gain weight…
Stars and Solar System We are not able to see the back side of the moon? Why? Phases of the Moon: The day today changes in the shape of the moon as seen from the earth is called as phases of the moon. There are 6 Phases 1. New moon…
Define Friction?? What are the Causes of Friction?? Write a short note on Spring Balance?? Working Principle: List the various types of Friction?? There are Three types of friction Static friction: The opposing force that comes when one object tends to move over the surface of another but the actual…
Class 8 Cell Structure and Functions Robert Hooke coined the term “Cell” in Latin cell means “Little room” He observed The Cork (the bark of the tree) under the microscope Cell Theory was proposed by German Biologist Cell Theory Two instruments are used to study the cells, they are Compound…
What are the most important natural resources? Air and Water Define Pollution?? Contamination of natural resources like air and water by addition of toxic and poisonous substance due to various human activities is called Pollution. Define Pollutant and give some examples?? When does a substance become pollutant?? Define Air Pollution??…