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Geography Flashcards

6 cards from real O-LEVEL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Geography flashcards as text

  1. What is the definition of a 'population pyramid'?

    Answer: A bar graph showing the age and sex distribution of a population

    A population pyramid is a bar chart showing the distribution of a population by age groups and sex (male/female), useful for analysing demographic trends.

  2. What causes the urban heat island effect?

    Answer: Higher temperatures in urban areas due to human activity and lack of vegetation

    The urban heat island effect occurs because cities absorb and retain more heat than rural areas due to concrete, asphalt, reduced vegetation, and waste heat from human activities.

  3. Which type of weathering involves the physical breakdown of rocks without chemical change?

    Answer: Mechanical/physical weathering

    Mechanical (physical) weathering is the breakdown of rocks into smaller pieces without any change in chemical composition, e.g., freeze-thaw action.

  4. What is the 'greenhouse effect'?

    Answer: The trapping of heat in the Earth's atmosphere by greenhouse gases

    The greenhouse effect is the process by which greenhouse gases (CO₂, methane, water vapour) trap heat in the Earth's atmosphere, warming the planet.

  5. What is the term for the seasonal migration of people between different areas?

    Answer: Transhumance

    Transhumance is the seasonal movement of people with their livestock between different pasture areas, typically between lowlands in winter and highlands in summer.

  6. What is a watershed?

    Answer: The area of land that drains into a river or body of water

    A watershed (or drainage basin/catchment area) is the area of land from which all water drains into a particular river system or body of water.

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Sources & references

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  1. file.go.gov.sg — Retake policy · verified Nov 2026
  2. seab.gov.sg — Passing score, score release, test delivery, eligibility, fees, registration · verified Nov 2026