class 6 science activities

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Class 6th Science written work Ch 16 Garbage in Garbage out

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  Exercise Questions 1. (a) Which kind of garbage is not converted into compost by the red worms? (b) Have you seen any other organism besides red worms, in your pit? If yes, try to find out their names. Draw pictures of these. Solution: a) P ieces of cloth, polythene bags, broken glass, aluminium wrappers, nails and broken toys are  not converted into compost by the red worms. b) Earthworms, small insects like ant, millipedes are found in pits. 2. Discuss: (a) Is garbage disposal the responsibility only of the government? (b) Is it possible to reduce the problems relating to disposal of garbage? Solution: a) No, not just the government, but everybody is responsible for garbage disposal. We should bifurcate wet and dry waste, recycle the non-biodegradable substances and we should also reduce the accumulation of garbage in our house and streets. b) Yes, it is possible to reduce the problems of garbage by scientific disposal of garbage, we can do it by bifurcation of different w...
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Class 9th Science Matter in Our Surrounding Written Work

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Exercise-1.1-1.2 Page: 3 1. Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, lemon water, smell of perfume . Solution: The following substances are matter: Chair Air Almonds Lemon water Smell of perfume (Smell is considered as a matter due to the presence of some volatile substances in air that occupy space & have mass.) 2. Give reasons for the following observation: The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close. Solution: Particles in the air, if fueled with higher temperatures, acquire high kinetic energy which aids them to move fast over a stretch. Hence the smell of hot sizzling food reaches a person even at a distance of several meters. 3. A diver is able to cut through water in a swimming pool. Which property of matter does this observation show? Solution: The diver is able to easily cut through the water in the swimming pool because of the weak forces of at...
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Class 6th Science Ch 12 Electricity and Circuits Revision Notes

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  Revision Notes on Electricity and Circuits Introduction to Electricity and Circuits Electricity has become so common that sometimes we forget its immense applications. Advantages of Electricity: Light in our houses, offices, roads etc. even past sunset To operate pumps which in turn have a lot of applications Electrical appliances like refrigerator, fans etc. Building houses, installing equipment etc. Fig 1: Refrigerator {Electric Appliance} Electric Cell and Electric Bulb Features of an Electric Cell: It is a small cylindrical structure which helps in operating the devices. A small metal cap is placed on one side and a metal disc is present on the other side. All cells have two terminals: Positive and Negative. The metal cap and metal disc are positive (+) and negative (-) terminals of the electric cell respectively. Chemical energy is converted into electrical energy inside a cell. When the chemicals are exhausted, the cell stops working. Fig 2: Electric Cell Features of a...
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