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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 6th Science written work Ch 15 Air Around Us

  Exercise Questions 1. What is the composition of air? Solution: Air comprises water vapour, Oxygen, Nitrogen, Carbon dioxide, dust and smoke. 2. Which gas in the atmosphere is essential for respiration? Solution: Oxygen in the atmosphere is essential for respiration. 3. How will you prove that air supports burning? Solution: Place two candles of the same length on a table. Light both the candles. Cover one of the candles with an inverted glass tumbler. We observe that the candle covered with a glass tumbler got extinguished after some time, whereas the other candle continued burning. The candle gets extinguished because the component inside of the glass tumbler, which supports burning, is limited. Most of the component is used up by the burning candle. However, the other candle is getting continued supply of air. This component of air, which supports burning, is known as oxygen. 4. How will you show that air is dissolved in water? Solution: Take some water in a container. Heat it...
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Class 5th science written work Ch 1 Growth and development in Plants

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Date 24 April,2021 Day: Saturday Ch 1 Growth and development in Plants Give short answer to the following  Q1. What is germination? Ans: the process of converting a seed into seedling. Q2.  what are the necessary conditions for seed to germinate? Ans:   Temperature , moisture,  air , and  light  conditions must be correct for seeds to germinate. Q3. what is the role of cotyledons in the growth of a seedling Ans:  Cotyledons function  to provide the initial  growth  for the plant and as an energy source. Q4. what is vegetative reproduction? Ans: V egetative reproduction  is a method wherein new plants are produced by vegatative parts of a plant called propagules. The  vegetative  parts mean the leaf, stem and root.  Q5. How does soil affect the growth of the plant? Ans: Plants growth is greatly affected by the type of soil. different types of soil suitable for different kinds of plants. for example black soil...
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