Reproduction in Plants Exercise: 1). Fill in the blanks. (a) Production of new individuals from the vegetative part of parent is called vegetative propagation. (b) A flower may have either male or female reproductive parts. Such a flower is called a unisexual flower. (c) The transfer of pollen grains from the anther to the stigma …
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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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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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Air Around Us Exercise: 1). What is the composition of air? Ans: Air is a mixture of nitrogen, oxygen, carbon dioxide, water vapour, dust particles and a few other gases. 2). Which gas in the atmosphere is essential for respiration? Ans: Oxygen in the atmosphere is essential for respiration. 3). How will you prove that …
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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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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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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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Nandita in Mumbai Questions with the (*) sign are open-ended questions. Page 139 Why did Nandita have to bring her mother from the village to Mumbai? Nandita brought her mother from the village to Mumbai for her treatment. Nandita used to feel like vomiting when at first, she had to …
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From Market To Home Questions with (*) sign are open-ended questions. Page 120 Does anyone in your house have to get up very early? What time does he or she get up? Why do they need to get up so early? My parents get up early in the morning. …
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Fun With Magnets Exercise: 1). Fill in the blanks in the following. (i) Artificial magnets are made in different shapes such as bar magnet, disc magnet and horse-shoe magnet. (ii) The Materials which are attracted towards a magnet are called magnetic materials. (iii) Paper is not a magnetic material. (iv) In the olden days, sailors …
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