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NCERT Solutions Std 8 Science Conservation of Plants and Animals

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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NCERT Solutions Std 8 Science Combustion and Flame

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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NCERT Solutions Std 8 Science Microorganisms Friend and Foe

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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NCERT Solutions Std 6 CBSE Science Garbage In Garbage Out

Garbage In Garbage Out Exercise: 1). (a) Which kind of garbage is not converted into compost by the redworms? Ans: Garbage substances like polythene bags, plastic items, broken glass particles that are non degradable cannot be converted into compost by the redworms. (b) Have you seen any other organisms besides redworms, in your pit? If …

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NCERT Solutions Std 7 Science Physical and Chemical Changes

Physical and Chemical Changes Exercise:   1). Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f ) Digestion of food Physical Changes Chemical Changes Dissolving sugar in water …

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