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P4 General Studies: The Water Cycle (Paper 1 (basics))
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 1 (basics))
Paper one covers the entry ideas of the water cycle: evaporation, condensation and precipitation, with two sums checking understanding of amounts.
Direct answers When water seems to vanish, think evaporation; when something looks like white mist, think condensed droplets.
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)
- FoundationAfter rain a puddle slowly dries in the sun. Where has the water gone?
- FoundationWater vapour rises and cools. What does it turn into?
- FoundationA glass holds 250 mL of water and three fifths of it evaporates. How much is left?
- IntermediateAbout 97 per cent of the water on Earth is sea water. What percentage is fresh water?
- IntermediateA cup holds 400 mL and 50 mL evaporates each day. After how many days is it all gone?
- IntermediateWhere does the energy driving the water cycle mainly come from?
- ChallengeA family uses 180 L of water a day, of which 45 L goes on showers. What percentage is that?
- ChallengeHow do evaporation and boiling differ?
- ChallengeWhy do clothes still dry on a windy winter day?
- Error redoError clinic: water vapour is the white smoke we can see. True?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | It has turned into water vapour in the air. | This is evaporation: the Sun supplies the energy and liquid water changes into gas. |
| 2 | Tiny water droplets or ice crystals. | Cooling makes the vapour condense into droplets, which gather together as clouds. |
| 3 | 100 mL | 250 times three fifths is 150, and 250 minus 150 leaves 100 mL. |
| 4 | 3 per cent | 100 minus 97 gives 3, so fresh water is very limited. |
| 5 | 8 days | 400 divided by 50 gives 8 days. |
| 6 | The Sun. | The Sun heats water surfaces and the ground, making water evaporate and rise; that is the engine of the cycle. |
| 7 | 25.0 per cent | 45 divided by 180 times 100 gives 25.0, showing showers use a large share. |
| 8 | Evaporation happens at any temperature; boiling only at the boiling point. | Evaporation takes place at the surface only, while boiling produces bubbles throughout the liquid. |
| 9 | Water evaporates even when it is cold, and the wind carries the vapour away. | Evaporation needs no high temperature; wind removes vapour near the surface so it keeps going. |
| 10 | No. | Vapour is colourless and invisible; the white mist is droplets that have already condensed. |
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.
After paper one, take paper two and sort out series against parallel in one pass.Tutor Registration →
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