Water is a colourless liquid that is essential for survival on the planet. It makes up 71% of the Earth, and is also known as the blue planet. The origin of water has been discovered to be a type of meteorite. Water on Earth has the same chemical composition as some meteorites. Lakes, rivers, and ponds are the primary sources of water for human consumption.
Water is a scarce resource. It is required for all living things and must be carefully managed to ensure that we have enough for our needs while also protecting the environment. Water is a valuable resource.
Download PDF of Class 7 Chemistry Worksheet on Chapter 16 Water a Precious Resource – Set 1
CBSE Class 7 Chemistry Chapter 16 Water a Precious Resource Worksheet – Set 1
Q1. The main source of water for rivers is in the form of:
a.) Lakes
b.) Rainwater
c.) Snow
d.) Dam
Q2. Which of the following is a source of drinking water?
a.) Seawater
b.) Glaciers
c.) Groundwater
d.) None of the above
Q3. Water in wells is an example of:
a.) Surface water
b.) Underground water
c.) Distilled water
d.) Mineral water
Q4. There are ___ forms of water.
a.) Two
b.) Three
c.) Four
d.) Five
Q5. During the water cycle, the water is circulated from the Earth in the form of:
a.) Vapour
b.) Rain
c.) Humidity
d.) All of the above
Q6. Fill in the blanks:
a.) Rapid growth of industries, increasing population, and growing irrigation requirements cause water ____.
b.) ____ was a traditional way of collecting water.
c.) The process of seeping water into the ground is called ___.
Q7. State true or false.
a.) Water vapour is the gaseous form of water.
b.) We can use ocean water for drinking purposes.
c.) Sometimes, groundwater accumulates between layers of hard rock. This is known as an aquifer.
Q8. Define evaporation.
Q9. What is condensation?
Q10. Explain why ice floats on water.
Q11. What factors are responsible for the depletion of the water table?
Q12. Explain why water is a universal solvent.
Q13. State why we cannot use the water in the sea and ocean.
Q14. What are the sources of groundwater?
Q15. What is a water table?
Q16. What is water pollution?
Q17. What are the ways to conserve water?
Q18. Describe the role of water in the life of animals and plants.
Q19. List the uses of water.
Q20. Explain how increasing agricultural activities are responsible for the depletion of the water table.
Download PDF to access answers of Chemistry Worksheet for Class 7 Chemistry Chapter 16 Water a Precious Resource Set 1.
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