中文（繁體）
中文（简体）
English
S6 Geography: Urban Climate and Air Pollution (Paper 1 (basics))
S6 Geography: Urban Climate and Air Pollution (Paper 1 (basics))
Paper 1 (basics): ten questions on urban climate and air pollution with worked numbers, answers and one line notes.
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: S6 Geography: Urban Climate and Air Pollution |
| Level | S6 |
02 Questions (10 items)
- FoundationWhat is the urban heat island effect?
- FoundationThe urban station reads 32 degrees and the rural station 28 degrees. What is the heat island intensity?
- FoundationAt which time of day is the urban heat island usually most obvious?
- IntermediateWhat is the effect of a surface with high albedo?
- IntermediateWhy does losing urban green space raise air temperature?
- IntermediateWhat is the difference between PM2.5 and PM10?
- ChallengeThree stations record 28, 30 and 32 degrees. What is the mean temperature?
- ChallengeWhat is the main function of a ventilation corridor?
- ChallengeNitrogen dioxide on a street falls from 60 micrograms per cubic metre in the morning to 45 in the afternoon. What is the percentage drop?
- Error redoError clinic: someone claims the heat island only appears in summer. Is that right?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | The phenomenon in which urban air temperature is higher than in the surrounding countryside | Dense buildings, limited green cover and human heat emissions all contribute. |
| 2 | 4 degrees | 32 minus 28 gives 4, and the heat island intensity is simply the temperature gap. |
| 3 | Late at night to early morning | Buildings absorb heat by day and release it slowly at night, while rural surfaces cool faster. |
| 4 | It reflects more solar radiation, so the surface stays cooler | Pale roofs have high albedo, which is the principle behind cool roofs. |
| 5 | Less transpiration means weaker evaporative cooling | Plants carry heat away through transpiration, so fewer plants mean less of this cooling. |
| 6 | PM2.5 is 2.5 micrometres or smaller, while PM10 is 10 micrometres or smaller | Smaller particles penetrate deeper into the lungs. |
| 7 | 30 degrees | The three readings add up to 90, and 90 divided by 3 gives 30. |
| 8 | To guide cooler rural air into the city and carry pollutants away | A corridor must run roughly parallel to the prevailing wind and avoid being blocked by tall buildings. |
| 9 | 25 percent | The gap is 15, and 15 divided by 60 gives 0.25. |
| 10 | No. It occurs all year, and the winter night gap is often larger | Rural surfaces cool quickly on winter nights while the city holds its stored heat, so the gap widens. |
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.
For urban climate questions, decide first whether the answer is a temperature difference or a percentage: subtract for a difference, and divide the change by the original value then multiply by one hundred for a percentage. For air questions, remember that smaller particles reach deeper into the lungs, and ozone needs sunlight and nitrogen oxides.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.
© TutorZone · www.tutorzone.com.hk · For personal study and teaching use only.