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P4 General Studies: The Water Cycle (Paper 3 (challenge))
Tutor Prep Guide · the digestive system and the food pyramid, enzymes and bile, energy and nutrient calculations, and balanced eating habits
P4 General Studies: The Water Cycle (Paper 3 (challenge))
Paper three adds deposition, fog and dew, with multi-step sums on shower use, pond storage and the runoff share.
Direct answers When litres and cubic metres are mixed, convert everything to litres first and change back at the end.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: P4 General Studies: The Water Cycle |
| Level | parts of a closed circuit, conductors against insulators, series against parallel, adding up battery voltage, and electrical safety |
02 Questions (10 items)
- FoundationVapour meets a very cold object and turns straight into ice crystals. What is this called?
- FoundationWhere do the drops on leaves in the early morning come from?
- FoundationDroplets near the ground reduce visibility. What is this weather phenomenon called?
- IntermediateAn 8-minute shower uses 9 L a minute. How much water is that, in litres and cubic metres?
- IntermediateThree ponds hold 4 million cubic metres each and 35 per cent has been used. How much remains?
- IntermediateYearly rainfall is 240 mm and 60 mm becomes runoff. What percentage is runoff?
- ChallengeAn evaporation pan holds 120 mL and loses 36 mL in 3 days. At this rate, when is it empty?
- ChallengeWhy does evaporation speed up in wind?
- ChallengeWhy is transpiration usually lower in a city than in a forest?
- Error redoError clinic: rain is a whole cloud falling down. True?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | Deposition. | Going from gas straight to solid is deposition, and that is how frost forms. |
| 2 | Vapour condenses on the cooled leaf surface at night. | Leaves cool faster than the air, so vapour condenses on them as dew; it does not fall from the sky. |
| 3 | Fog. | Fog is a cloud at ground level, formed by the same condensation. |
| 4 | 72 L, that is 0.072 m3 | 8 times 9 gives 72 L, and dividing by 1 000 gives 0.072 cubic metres. |
| 5 | 780 million cubic metres | 4 million times 3 is 12 million, and 65 per cent of that is 780 million. |
| 6 | 25.0 per cent | 60 divided by 240 times 100 gives 25.0 per cent. |
| 7 | 10 days | 36 divided by 3 is 12 mL a day, and 120 divided by 12 gives 10 days. |
| 8 | Wind carries away the vapour just above the surface. | With less vapour in the air above, water keeps evaporating, so clothes dry faster in wind. |
| 9 | Cities have fewer trees and less permeable ground. | Transpiration needs plants; with little greenery a city returns less water to the air. |
| 10 | No. | Droplets in a cloud collide and grow until they are too heavy for the air to hold, then fall as raindrops. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
Paper four clears the conductor, insulator and battery direction misconceptions.Tutor Registration →
Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.