CBSE Std 7 Science

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 …

NCERT Solutions Std 7 Science Winds, Storms and Cyclones Read More »

 71 total views

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 …

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

 90 total views,  4 views today

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 …

NCERT Solutions Std 7 Science Physical and Chemical Changes Read More »

 80 total views,  5 views today

NCERT Solutions Std 7 Science Acids, Bases and Salts

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 …

NCERT Solutions Std 7 Science Acids, Bases and Salts Read More »

 151 total views,  10 views today

NCERT Solutions Std 7 Science Heat

Heat Exercise: 1). State similarities and differences between the laboratory thermometer and the clinical thermometer. Similarities: i). both consists of long, narrow, uniform glass tube. ii). both have mercury in the bulb. iii). both has Celsius scale on the glass tube Differences:   Laboratory thermometer Clinical thermometer 1. The laboratory thermometer is designed to measure …

NCERT Solutions Std 7 Science Heat Read More »

 135 total views,  10 views today

NCERT Solutions Std 7 Science Fibre to Fabric

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 …

NCERT Solutions Std 7 Science Fibre to Fabric Read More »

 183 total views,  6 views today

NCERT Solutions Std 7 Science Nutrition in Animals

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 …

NCERT Solutions Std 7 Science Nutrition in Animals Read More »

 173 total views,  7 views today

NCERT Solutions Std 7 Science Nutrition in Plants

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 …

NCERT Solutions Std 7 Science Nutrition in Plants Read More »

 382 total views,  12 views today