A list of words is given in a box. Use appropriate words to fill up the blanks in the following statements.

(a) Synthetic fibres are also called artificial or man-made fibres.  (b) Synthetic fibres are synthesized from raw materials called petrochemicals.  (c) Like synthetic fibres, plastic is also a polymer.

(a) chlorophyll (b) energy (c) energy (d) photosynthesis (e) carbon dioxide (f) water (g) food/carbohydrates

(a) physical (b) reversible (c) physical (d) rusted, chemical, substance.

hot, scarcity, workers, dry, rivers, harvesting

large, water, ground, ground, handpumps, water, cholera

(a) fat, protein; (b) balanced diet; (c) obesity; (d) roughage; (e) Vitamin C

(i) My friend lost his chemistry book. Now he doesn’t know what to do and where to look for it. (ii) There are so many toys in the shops. Neena can’t...

Easy Palak-­Dal  INGREDIENTS  One onion  One cup dal  Two thin green chillies  Half a teaspoon red chilli powder  Eight small bunches of palak  Two tomatoes  Salt to taste  Wash and cut the vegetables; shred the palak. Put everything in...

(i) Gandhiji’s life was devoted to the cause of justice and fair play.  (ii) Have you insured your house against fire?  (iii) Diamond is nothing but carbon in its pure form.  (iv) If...

(i) The cat chased the mouse across the lawn.  (ii) We were not allowed to cross the frontier. So we drove along it as far as we could and came back...