Conserving Water

28 Grade 6 Agriculture questions on Conserving Water, with worked marking schemes. 28 questions are available on this topic in full.

1. Question 1

   1 mark

   Which of the following shows a responsible way of using water when washing utensils?

   A. Using very hot boiling water only

   B. Letting the tap run the whole time

   C. Using water once and pouring it away wastefully

   D. Using a basin of water instead of running water

   (1 mark)

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2. Question 2

   1 mark

   Planting grass and trees along a river bank helps to conserve water mainly by:

   A. Removing all shade

   B. Increasing water evaporation

   C. Drying up the river faster

   D. Reducing evaporation and holding soil moisture

   (1 mark)

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3. Question 3

   1 mark

   Which of the following farming practices helps to conserve water in a maize garden by covering the soil surface?

   A. Removing all ground cover

   B. Ploughing repeatedly

   C. Mulching with dry grass

   D. Watering at midday

   (1 mark)

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4. Question 4

   1 mark

   Why is drip irrigation better than flood irrigation for conserving water on a small kitchen garden?

   A. It waters the paths, not the plants

   B. It loses less water to run-off and evaporation

   C. It floods the whole garden

   D. It uses more water per plant

   (1 mark)

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5. Question 5

   2 marks

   Give TWO reasons why it is important for learners to conserve water in their school.

   (2 marks)

   Marking scheme

   1 mark each (any 2): clean water is scarce/limited; water is costly to get/treat; to have enough water for all school activities; to care for the environment; to avoid shortages during dry seasons.

6. Question 6

   4 marks

   (a) Define the term 'rainwater harvesting'.

   (b) State TWO structures used at home to harvest rainwater from a roof.

   (4 marks)

   Marking scheme

   (a) 2 marks: Rainwater harvesting is the collecting and storing of rain water (from surfaces such as roofs) for later use. (b) 1 mark each: gutters; storage tank/drum/water pan; downpipe.

7. Question 7

   1 mark

   Juma washes the family car using a bucket instead of a running hosepipe. How does this help in water conservation?

   A. It wastes water faster

   B. It makes the car cleaner

   C. It uses more water safely

   D. It uses less water for the same task

   (1 mark)

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8. Question 8

   1 mark

   A farmer collects and stores water in a pond during the rainy season to use in the dry season. This stored water body is called a:

   A. Mulch

   B. Water pan or reservoir

   C. Furrow

   D. Terrace

   (1 mark)

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9. Question 9

   4 marks

   A school has installed a large tank to harvest rainwater from the classroom roofs.

   (a) Give ONE benefit of harvesting rainwater for the school.

   (b) State TWO ways of keeping the harvested water clean and safe.

   (4 marks)

   Marking scheme

   (a) 2 marks: provides water for use during dry periods / saves money on buying water / provides water for gardening and cleaning (any one, well explained). (b) 1 mark each (any 2): keep the tank covered with a lid; clean the gutters and roof; treat/boil water before drinking; keep animals and dirt away from the tank.

10. Question 10

    1 mark

    Reusing water used to wash vegetables by using it to water flowers is an example of:

    A. Storing water for drinking

    B. Polluting the flowers

    C. Reusing water to reduce waste

    D. Wasting clean water

    (1 mark)

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11. Question 11

    1 mark

    Which container is MOST suitable for storing harvested rainwater safely for household use?

    A. An empty fertiliser bag

    B. An open uncovered drum

    C. A leaking bucket

    D. A covered clean water tank

    (1 mark)

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12. Question 12

    4 marks

    During a class discussion, learners listed careless habits that waste water.

    (a) State THREE habits that waste water.

    (b) For any ONE, suggest a better habit that conserves water.

    (4 marks)

    Marking scheme

    (a) 1 mark each (any 3): leaving taps running when not in use; failing to repair leaking taps/pipes; using running water to wash cars/utensils; watering plants at midday; overwatering crops. (b) 1 mark: a matching correct improvement, e.g. turn off the tap when soaping / repair leaks promptly / use a bucket / water in the morning or evening.

13. Question 13

    2 marks

    Explain how mulching helps to conserve soil water in a vegetable garden.

    (2 marks)

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14. Question 14

    3 marks

    State THREE ways a farmer can store water for use during the dry season.

    (3 marks)

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15. Question 15

    1 mark

    Which of the following is a reason why we should conserve water at home and on the farm?

    A. Water is unlimited everywhere

    B. Clean water is scarce and expensive to get

    C. Water cannot be reused

    D. Conserving water spoils crops

    (1 mark)

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16. Question 16

    1 mark

    A school collects rainwater from the roof of the classroom block into a large tank. This method of getting water is called:

    A. Rainwater harvesting

    B. Irrigation

    C. Terracing

    D. Mulching

    (1 mark)

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17. Question 17

    1 mark

    A leaking tap in the kitchen drips continuously all day. What is the FIRST action a learner should take to conserve water?

    A. Open the tap fully

    B. Ignore it until it stops

    C. Repair or report the leaking tap

    D. Collect the drips for drinking only

    (1 mark)

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18. Question 18

    4 marks

    Njoroge waters his tomato garden using a hosepipe that sprays water high into the air at midday, yet the plants still wilt.

    (a) Explain why much of his water is wasted.

    (b) Suggest TWO changes he can make to conserve water.

    (4 marks)

    Marking scheme

    (a) 2 marks: at midday the sun is hot so water evaporates quickly before reaching the roots; spraying into the air increases evaporation and loss to wind. (b) 1 mark each (any 2): water early morning or evening; use drip irrigation or a watering can at the base of the plants; mulch the soil to reduce evaporation.

19. Question 19

    1 mark

    Which of the following practices WASTES water rather than conserving it?

    A. Fixing leaking pipes

    B. Leaving the tap running while brushing teeth

    C. Turning off the tap when soaping hands

    D. Watering plants in the evening

    (1 mark)

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20. Question 20

    1 mark

    A gutter is fixed along the edge of a roof during rainwater harvesting. What is the work of the gutter?

    A. To dry the roof

    B. To spread water on the ground

    C. To channel rainwater into the storage tank

    D. To block rain from falling

    (1 mark)

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21. Question 21

    3 marks

    A farmer in a semi-arid area wants to grow vegetables using little water.

    (a) Name ONE water-saving irrigation method suitable for the farmer.

    (b) Give TWO reasons why the method you have named conserves water.

    (3 marks)

    Marking scheme

    (a) 1 mark: Drip irrigation. (b) 1 mark each (any 2): water is delivered slowly/directly to the roots; little water is lost through evaporation; little water is lost as run-off; only the plant area is watered, not paths.

22. Question 22

    1 mark

    Watering crops using a watering can with a rose (sprinkler head) rather than pouring from an open bucket helps because it:

    A. Waters only the footpaths

    B. Washes away the seeds

    C. Spreads water gently and evenly, reducing waste

    D. Uses much more water

    (1 mark)

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23. Question 23

    1 mark

    Terraces are made across a sloping farm mainly to help conserve water by:

    A. Removing all the soil

    B. Slowing down run-off so water soaks into the soil

    C. Speeding up run-off down the slope

    D. Drying the soil quickly

    (1 mark)

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24. Question 24

    1 mark

    During the dry season, Amina notices the family vegetable garden dries up quickly after watering in the afternoon. What is the BEST time of day to water the vegetables to reduce water loss?

    A. In the early afternoon

    B. At midday when the sun is hottest

    C. Early morning or evening

    D. Only at noon

    (1 mark)

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25. Question 25

    3 marks

    Wanjiku's family lives in a dry area where water is scarce. Explain THREE ways the family can conserve water at home.

    (3 marks)

    Marking scheme

    Award 1 mark each (any 3): Repairing/reporting leaking taps and pipes; using a basin/bucket instead of running water when washing; harvesting and storing rainwater in covered tanks; reusing water (e.g. vegetable-washing water for plants); turning off taps when not in use; covering water storage containers to prevent evaporation.

26. Question 26

    1 mark

    Which of the following is a natural source of water that should be protected from pollution to ensure a clean supply?

    A. A spring

    B. A tarmac road

    C. A charcoal jiko

    D. A dust bin

    (1 mark)

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27. Question 27

    1 mark

    Covering a water storage tank tightly with a lid helps to conserve water by:

    A. Increasing evaporation

    B. Letting in dust

    C. Making water dirty

    D. Preventing evaporation and contamination

    (1 mark)

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28. Question 28

    1 mark

    Which irrigation method delivers water slowly and directly to the roots of plants through pipes, wasting the least water?

    A. Flood irrigation

    B. Furrow irrigation

    C. Drip irrigation

    D. Overhead sprinkling

    (1 mark)

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