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8th Conservation of Plants and animals : Science power Class 8th

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Book resource: Science power Class 8 th Check point-01 [Formative Assessment]        1. Define Afforestation? Answer:  The practice of planting more and more trees is called Afforestation. 2. What is desertification? What causes desertification? Answer: The phenomenon of converting fertile land into desert is called desertification. Deforestation causes desertification. 3. What is the effect of deforestation on rainfall and climate? Answer:  Deforestation increases temperature and wind velocity that reduce rainfall. These changes led to climate change. Check point-02 [Formative Assessment]        1. What is wild life? Answer: Wild life is an area where organism lives in their natural habitat like dense forest, jungle and water bodies. 2. Give one difference between endangered and vulnerable ? Answer: Endangered are those animals that are not likely survive and will soon extinct where as Vulnerable are those animal which are likely to move in enda

Chemical reactions and equations Activity Based Question 10th Chemistry

Q. A student added a few pieces of zinc into dil.H ₂ SO ₄ taken in a test tube. Suddenly, evolution of gas occurs. What gas is evolved?              Answer: Hydrogen gas Q. Why do copper sulphate crystals change colour from blue to white on heating? Answer: Due to lose of water of crystallization which can also be called as dehydration Q.  What happens when a small piece of iron is kept in copper sulphate solution?      Answer: Simple displacement reaction results in the Formation of a brown coating of copper on the surface of iron nail. The green colour of the solution is due to the displaced Fe² ⁺ ions from the Iron nail Q.  While performing an experiment, a student adds sodium sulphate solution to a colourless solution. A white precipitate is immediately formed and is insoluble in dil. HCl. The colourless solution is …………………………… and the precipitate formed is…………………… Answer: Barium chloride reacts with sodium sulphate to form a white precipitate of barium sulphate[

CBSE Class 8th Science Term-01 Study Links

Class 8th Science Term-01 1. Crops Production and Management 2. Microorganisms-Friend and Foe 3. Force and Pressure 4. Frictions 5. Chemical Effects of Electric Current 6.  Sound, Wave, Music and Noise 7. Synthetic Fibre and Plastics 8. Metals and Non-Metals 9. Conservation   of Plants and Animals Conservation Class VIII Mathematics [Click on links given below] VIII Algebra VIII Commercial Maths VIII Geometry & Mensuration   CBSE Class VIII Science Physics Chemistry Biology 8th Sample paper 8th Social Science