Std 7 CBSE Science

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

CBSE Std 7 Science / By

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 7 Science Acids, Bases and Salts

CBSE Std 7 Science / By

Acids, Bases and Salts Exercise: 1). State differences between acids and bases. Acids Bases 1. Acids are substances that contain hydrogen ion.   1. Bases are substances that contain hydroxyl ion. 2. Acid turns blue litmus red.   2. Base turns red litmus blue. 3. Acids are sour to taste.   3. Bases are bitter …

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NCERT Solutions Std 7 Science Fibre to Fabric

CBSE Std 7 Science / By

Fibre To Fabric Exercise: 1). You must be familiar with the following nursery rhymes: (i) ‘Baa baa black sheep, have you any wool.’ (ii) ‘Mary had a little lamb, whose fleece was white as snow.’ Answer the following: (a) Which parts of the black sheep have wool?  Ans: Fleece – the hairy skin of the …

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NCERT Solutions Std 7 Science Nutrition in Animals

CBSE Std 7 Science / By

Nutrition in Animals Exercise: 1). Fill in the blanks: (a) The main steps of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion. (b) The largest gland in the human body is the liver. (c) The stomach releases hydrochloric acid and digestive juices which act on food. (d) The inner wall of the small …

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NCERT Solutions Std 7 Science Nutrition in Plants

CBSE Std 7 Science / By

Nutrition in Plants Exercise: 1). Why do organisms take food?      Organisms need food for growth and development. Food also provides energy.   2). Distinguish between a parasite and a saprotroph. Parasite Saprotroph 1. A parasite is an organism that takes the food from the living thing on which it survives. 1. An organism that …

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