The water cycle and groundwater
Describe the water cycle and explain why groundwater stores matter to farms and communities.
Exam scope and assessment notes
Use this original lesson for the listed 2026, 2027–2028 and 2029–2031 Cambridge syllabus cycles. This route maps Cambridge's 2026 Version 2, 2027–2028 Version 1 and 2029–2031 Version 1 syllabuses. The 2026 update changes only a weblink; Cambridge reports no significant teaching changes for the 2027–2028 or 2029–2031 cycles. Exams are in the November series, and the qualification is not available in every administrative zone; confirm entry with your centre. Centre-selected local crop, weed, pest, disease and livestock examples must be checked against local agriculture. StudyForA does not replace supervised, risk-assessed practical work, the four assessed practical exercises, the individual practical investigation/report, teacher assessment or Cambridge moderation. Online practice is not an official mark or grade.
Before you begin
- Read the syllabus that matches your exam year and confirm your centre can enter you for code 0600. This route maps Cambridge's 2026 Version 2, 2027–2028 Version 1 and 2029–2031 Version 1 syllabuses. The 2026 update changes only a weblink; Cambridge reports no significant teaching changes for the 2027–2028 or 2029–2031 cycles. Exams are in the November series, and the qualification is not available in every administrative zone; confirm entry with your centre. Centre-selected local crop, weed, pest, disease and livestock examples must be checked against local agriculture. StudyForA does not replace supervised, risk-assessed practical work, the four assessed practical exercises, the individual practical investigation/report, teacher assessment or Cambridge moderation. Online practice is not an official mark or grade.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What can happen if groundwater is pumped faster than it recharges?
What you will learn
- Trace evaporation, condensation, precipitation, runoff, infiltration and groundwater flow.
- Explain the significance and limits of groundwater resources.
Trace water between stores
Energy from the Sun drives evaporation from water and land; plants return water vapour by transpiration. Water vapour cools and condenses, clouds form and precipitation returns water to land and water bodies.
Some precipitation flows over the surface as runoff; some infiltrates and percolates through soil and rock. Water stored underground in saturated material is groundwater, which may feed springs and rivers or be accessed by wells.
Use groundwater carefully
Groundwater can supply people, livestock and irrigation, especially when surface water is limited. Recharge depends on rainfall, infiltration and local geology; extraction faster than recharge can lower water levels.
Contamination can persist underground and is not always visible. Protect recharge areas and assess water quality and local rights before use.
Sources for this lesson
Pause and explain
What can happen if groundwater is pumped faster than it recharges?
Worked example
A community pumps more groundwater during a long dry season. Explain one short-term benefit and one long-term risk.
Show the worked solution
- Pumping can provide water when rainfall and surface supplies are low.
- If extraction exceeds recharge, the water table may fall and future supplies or connected springs may decline.
- Water quality, access, recharge and alternative demand should be monitored.
Answer Groundwater can buffer seasonal shortages, but excessive pumping may deplete the store or affect connected water sources.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Describe the route from rainfall to a well and name one condition that affects how much water reaches groundwater.
Give me a hint
Include infiltration and movement through soil or rock.
Compare my reasoning
- Precipitation reaches the land surface.
- Some water infiltrates and percolates downward through soil and permeable material.
- Geology, soil, vegetation, rainfall intensity and surface sealing affect recharge.
Some rainfall infiltrates and percolates to groundwater. Recharge depends on the ground and rainfall conditions; some water instead runs off or returns to the atmosphere.
Look for these in your work
- Sequence is coherent
- Infiltration included
- A recharge condition identified
A farmer says a nearby well proves the aquifer can supply unlimited irrigation. Evaluate the claim.
Give me a hint
Distinguish a current water source from sustainable yield and water quality.
Compare my reasoning
- A well shows groundwater can be accessed at that location and time.
- It does not show the recharge rate, total storage, water quality or the effects of additional pumping.
- Monitor water levels and quality and compare extraction with local recharge and other users' needs.
The well proves access, not unlimited supply. Sustainable use requires evidence about recharge, storage, quality and competing demand.
Look for these in your work
- Claim evaluated
- Recharge and quality separated
- Monitoring proposed
Sketch a water-cycle explanation for a farm that experiences both surface runoff and groundwater recharge. Identify where management could reduce contamination risk.
Give me a hint
Show flows and a route by which pollutants could travel.
Compare my reasoning
- Map precipitation, runoff, infiltration, groundwater and crop water use.
- Identify where fertiliser, manure or chemicals could enter runoff or infiltrating water.
- Use locally approved storage and application practices and protect vulnerable recharge areas.
A cycle diagram should show both surface and underground pathways. Preventing contamination depends on identifying where substances can move into water and following local guidance.
Look for these in your work
- Two flow pathways represented
- Contamination route identified
- Prevention linked to local practice
Common mistakes
- Treating groundwater as a new water source made by pumps
- Assuming every aquifer recharges at the same rate
- Equating infiltration with groundwater extraction
What can you explain now?
What can happen if groundwater is pumped faster than it recharges?
Compare with the explanation
The water table can fall and supplies may become less reliable
Extraction can exceed recharge and reduce stored groundwater.
After trying it yourself, choose your next review. This is your self-assessment.
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Make it stick
Trace one complete water-cycle pathway and explain why groundwater use must be compared with recharge.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.