Water and its importance Worksheet-10

Water and its importance Worksheet-10

 

True or False:

  1. Ice sinks in water.
  2. Newly planted perennials don't need watering as much as newly planted annuals.
  3. Perennials should be watered until the soil is wet to at least 4 inches.
  4. We should use a hose to clean the car to save water.
  5. Garbage and harmful chemicals pollute the water.
  6. Almost 75% of our body weight is due to water.
  7. Water exists in solid, liquid, and gaseous states.
  8. Raindrops are tear-shaped.
  9. Rainwater harvesting is the cyclic movement of water from the atmosphere to the Earth and back to the atmosphere through various processes.
  10. 2.997% is locked up in the ice caps or glaciers or is buried so deep under that it.
  11. Sea water is slightly more basic (the pH value is higher) than most natural fresh water.
  12. If you filled a glass full of water from the Great Salt Lake, when it evaporated there would be 1 inch of salt left.
  13. In India, about 70% of the total water available is used for agriculture, 8% by industries, and only 20-22% is used for personal or domestic needs.
  14. Evaporation plays a key role in cloud formation and rain.
  15. The water vapour condenses on dust particles present in the atmosphere to form millions of tiny droplets.
  16. Rainwater is the purest form of water.
  17. During floods, plants and crops die either due to suffocation by excess water or due to soil being washed away.
  18. More things can be dissolved in sulfuric acid than in water.
  19. Dams are also used in producing electricity.
  20. Storing rainwater that collects on roofs instead of letting it go down the drain is a practical solution in case of floods.
  21. Like most liquids, water contracts (gets smaller) when it freezes.

 

Answer Key:

  1. False
  2. False
  3. False
  4. True
  5. False
  6. True
  7. False
  8. False
  9. True
  10. True
  11. True
  12. False
  13. True
  14. True
  15. False
  16. True
  17. False
  18. True
  19. False
  20. False