PSEB Punjab Board Class 7 Science Textbook Solution Chapter 16 Water A Precious Resource Exercise Questions and Answers
PSEB Punjab Board Class 7 Science Textbook Solution Chapter 16 Water A Precious Resource Exercise Questions and Answers
Chapter 16 Water A Precious Resource
Q.1 Fill in the blanks:
(i) The water we drink is in ……………………. state.
Answer: liquid.
(ii) The process of seeping water into the soil is called …………………. .
Answer: Infiltration.
(iii) The upper level of groundwater is called ………………… .
Answer: Unsaturated area.
(iv) ………………. means dealing with water in the best possible ways.
Answer: Water Management
(v) A farmer can use water economically in the field, by …………….. .
Answer: Drip irrigation system
Q.2 True or false:
(i) Water cycle helps in maintaining water on the earth.
Answer: True
(ii) About 97% of total water present on the earth is freshwater.
Answer: False.
(iv) We are quickly moving towards a global water crisis.
Answer: True.
(v) Turn on taps while brushing.
Answer: False.
Q.3 Match the following.
Answer:-
1. Ice :- e. Solid state of water.
2. Saline water :- a. Oceans.
3. Fresh water :- b. Rivers and ponds.
4. Water vapour :- c. Gaseous state of water.
5. Rain water :- d. Purest form water.
Q.4 Choose the correct answer.
(i) Which of the following is responsible for depletion of groundwater ?
(a) Increasing population
(b) Increasing industries
(b) Deforestation
(d) All of these.
Answer: (d) All of these.
(ii) The Punjab preservation of subsoil water act was passed in the year:
(a) 2009
(b) 2010
(c) 2008
(d) 2015.
Answer: (a) 2009.
(iii) The world water day is celebrated every year on:
(a) 22 April
(b) 24 March
(c) 22 March
(d) 22 May.
Answer: (c) 22 March.
(iv) Ocean and seas cover about ………………… of the earth’s surface.
(a) 75%
(b) 71%
(c) 81%
(d) 29%.
Answer: (a) 75%.
(v) We should not keep taps running while:
(a) Brushing
(b) Shaving
(c) Bathing
(d) All of these.
Answer: (d) All of these
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