Chapter 8 Winds | Storms and Climate
Chapter 8 Winds | Storms and Climate Q.1.Fill the missing word in the blank spaces in the following statements: (a) Wind is ___________air. (b) Winds are generated due to _________ heating on the earth. (c) Near the earth’s surface _________ air rises up whereas _________ air comes down. (d) Air moves from a region _________of […]
Chapter 7 Weather, Climate and Adaptations of Animals to Climate
Chapter 7 Weather, Climate and Adaptations of Animals to Climate Q.1.Name the elements that determine the weather of a place. Ans. The temperature, humidity, rainfall, wind-speed, etc. are called the elements that determine the weather of a place. Q.2. When are the maximum and minimum temperature likely to occur during the day? Ans.The maximum temperature […]
Chapter 6 Physical and Chemical Changes
Chapter 6 Physical and Chemical Changes Q.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 Ans.(a) Chemical change (b) Physical change (c) Chemical change (d) […]
Chapter 5 Acids Bases and Salts
Chapter 5 Acids Bases and Salts Ans. Q.2.Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature? Ans.Ammonia has basic nature. Q.3.Name the source from which litmus solution is obtained. What is the use of this solution? Ans.Litmus solution is extracted from lichens. It is […]
Chapter 4 Heat
Chapter 4 Heat Q.1. State similarities and differences between the laboratory thermometer and the clinical thermometer. Ans. Similarities: (i) Both thermometers consist of long narrow uniform glass tubes. (ii) Both have a bulb at one end. (iii) Both contain mercury in bulb. (iv) Both use Celsius scale on the glass tube. Differences: (i) A clinical thermometer […]
Chapter 3 Fibre to Fabric
Chapter 3 Fibre to Fabric Q.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? (b) What is meant by the white […]
Chapter 2 Nutrition in Animals
Chapter 2 Nutrition in Animals Q.1.Fill in the blanks: (a) The main steps of nutrition in humans are ___________, ___________, ___________ , ___________ and ___________ (b) The largest gland in the human body is ___________. (c) The stomach releases hydrochloric acid and ___________ juices which act on food. (d) The inner wall of the small […]
Chapter 1 Nutrition in Plants
Chapter 1 Nutrition in Plants Q.1. Why do organisms need to take food? Ans. Food is needed by all organisms for many purposes: (a) The main function of food is to help in growth. (b) Food provides energy for movements such as running, walking or raising our arm. (c) Food is also needed for replacement and […]