CBSE BOARD

NCERT Solutions Std 7 Science Transportation in Animals and Plants

Transportation in Animals and Plants   Exercise: 1). Match structures given in Column I with functions given in Column II. Column I                                  Column II (i) Stomata                                (a) Absorption of water (ii) Xylem                                  (b) Transpiration (iii) Root hairs                           (c) Transport of food (iv) Phloem                                (d) Transport of water       …

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NCERT Solutions Std 7 Science Respiration in Organisms

Respiration in Organisms   Exercise: 1). Why does an athlete breathe faster and deeper than usual after finishing the race? Ans: An athlete needs more energy during and after the race. As the demand of energy is high, it needs more supply of oxygen. Therefore to fulfil the demand of oxygen an athlete breaths fast and …

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NCERT Solutions Std 7 Science Winds, Storms and Cyclones

Winds, Storms and Cyclones Exercise: 1). Fill the missing word in the blank spaces in the following statements: (a) Wind is moving air. (b) Winds are generated due to uneven heating on the earth. (c) Near the earth’s surface warm air rises up whereas comparatively cooler air comes down. (d) Air moves from a region of …

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NCERT Solutions Std 7 Science Weather, Climate and Adaptations of Animals to Climate

Weather, Climate and Adaptations of Animals to Climate Exercise: 1). Name the elements that determine the weather of a place.       The elements that determine the weather of a place are temperature, humidity, rainfall during the past 24 hours and wind speed. 2). When are the maximum and minimum temperatures likely to occur …

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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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