Geography (ភូមិវិទ្យា)
The Geography paper tests map and atlas skills, physical and human geography, and the link between environment and livelihoods. Answers score when they use named places, directions and a clear causal chain.
Physical frame
- Area about 181,035 km², with a central plain built by the Mekong and Tonle Sap.
- Uplands: the Cardamom (Kravanh) and Elephant (Domrei) ranges in the southwest, the Dangrek escarpment on the northern border, and the eastern highlands.
- The Mekong enters from Laos, runs south, and at Phnom Penh divides into the upper and lower branches; the Tonle Sap river joins the system at the same point.
The Tonle Sap flood pulse
In the May–October southwest monsoon, Mekong discharge is high and the Tonle Sap river reverses, filling the lake several times over; in the dry season it drains back. Flooded forest and the lake's productivity support fisheries, and the receding water leaves silt for recessional rice.
Worked example
Explain why the lake's flood pulse matters for Cambodia's food supply. Step 1: monsoon rain raises the Mekong level. Step 2: backflow floods forest, expanding fish habitat and spawning grounds. Step 3: the flood recharges soil moisture and deposits silt. Step 4: the drawdown lets farmers plant as water retreats. Conclusion: the pulse links fish protein and rice production, so upstream dams that flatten it threaten both.
Traps
- Claiming Cambodia has four seasons; it has two monsoon seasons, with a cooler December–January.
- Confusing the Cardamom range with the Dangrek.
- Quoting the lake's dry-season area as its monsoon area.
- Listing provinces when the question asks about regions.