Dynamic Planet

2027 focus

Earth’s fresh waters — hydrology, watersheds, surface water and groundwater.

Study plan

1. Map the water cycle with stocks and fluxes (evaporation, infiltration, runoff, recharge).
2. Learn stream features, drainage patterns, and floodplain vocabulary.
3. Practice reading hydrographs and topographic/watershed maps.
4. Review freshwater human impacts: dams, withdrawals, pollution.

Tips

Always identify upstream vs downstream on map questions before answering.