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Primary General Studies: Hong Kong Weather Warnings and Natural Hazards (Paper 1 (basics))
Primary General Studies: Hong Kong Weather Warnings and Natural Hazards (Paper 1 (basics))
Paper one builds the basics: the five cyclone signals, the four directions of signal 8, the three rainstorm colours, the temperature thresholds for hot and cold warnings, and safe behaviour in thunderstorms and landslides.
Direct answers Link each warning name with its number threshold and safety step so colours and directions do not get mixed up.
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: Primary General Studies: Hong Kong Weather Warnings and Natural Hazards |
| Level | parts of a closed circuit, conductors against insulators, series against parallel, adding up battery voltage, and electrical safety |
02 Questions (10 items)
- FoundationHow many levels are there in the tropical cyclone warning signals?
- FoundationSignal 8 is split into how many directions?
- FoundationHow much rain in one hour does the black rainstorm warning mean?
- IntermediateHow many colours does the rainstorm warning have?
- IntermediateAt what temperature does the Very Hot Weather Warning start?
- IntermediateAt what temperature does the Cold Weather Warning start?
- ChallengeWhat wind speed does signal 10 mean?
- ChallengeHow much stronger is signal 10 than signal 8 in wind speed?
- ChallengeDuring a thunderstorm warning, should you stay indoors or swim at the beach?
- Error redoA classmate says red rain is worse than black rain. What is wrong?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | Five: signal 1, 3, 8, 9 and 10. | The signals rise from 1 to 3, 8, 9 and 10, and the wind gets stronger each time. |
| 2 | Four: northeast, northwest, southeast and southwest. | Signal 8 is split by the direction the strong wind comes from. |
| 3 | Seventy millimetres or more in an hour. | Black is the top rainstorm warning; seventy millimetres in an hour can already flood roads. |
| 4 | Three: amber, red and black, from lowest to highest. | The darker the colour, the higher the rainfall needed, and black is the most serious. |
| 5 | Thirty-three degrees or above. | The warning reminds people to drink water and avoid long hours outdoors. |
| 6 | Twelve degrees or below. | The warning reminds elderly people and patients with chronic illness to keep warm. |
| 7 | One hundred and eighteen kilometres per hour or more. | Signal 10 is the top level and means hurricane-force wind. |
| 8 | Fifty-five kilometres per hour stronger. | Subtract sixty-three from one hundred and eighteen to get fifty-five. |
| 9 | Stay indoors and keep away from the beach and open ground. | Lightning strikes the tallest object in open ground, so water sports are the riskiest. |
| 10 | The order of colours is reversed; black is the most serious rainstorm warning. | The correct order is amber, red then black, and black has the highest rainfall threshold. |
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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