Conservation of Plants and Animals Exercise: 1). Fill in the blanks. (a) A place where animals are protected in their natural habitat is called wild life sanctuary. (b) Species found only in a particular area is known as Endemic species. (c) Migratory birds fly to far away places because of climate changes. 2). Differentiate …
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Combustion and Flame Exercise: 1). List conditions under which combustion can take place. Ans: The conditions under which combustion can take place are as follows. i). presence of a combustible substance ii). Presence of oxygen in the air. iii). Attaining ignition temperature. 2). Fill in the blanks. (a) Burning of wood and coal causes pollution …
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Microorganisms: Friend and Foe Exercise: 1). Fill in the blanks. (a) Microorganisms can be seen with the help of a microscope. (b) Blue-green algae fix nitrogen directly from air and enhance fertility of soil. (c) Alcohol is produced with the help of yeast. (d) Cholera is caused by bacteria. 2). Tick the correct answer. …
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