| Text | Air circulates between {{c2::high and low pressure belts}} as surface winds. These loops of winds are called {{c1::cells.}} |
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| Front | Factors affecting rivers flooding |
| Back | Prolonged Rainfall: soil becomes saturated so further rainfall can't infiltrade and must run on the surface to the river, runoff is sped upGeology: clay soils and some rocks are impermeable, runoff is increasedHeavy Rainfall: water arrives too rapidlyRelief: water arrives more quickly in a steep-sided valley, discharges more quicklyLand use: impermeable materials (e.g concreate and tarmac roads), drains also take them there more quickly. Cutting down trees means that they can't intercept rainwater nor take up water from the soil and store it. |
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| Text | A natural disaster is {{c1::a natural hazard that has actually happened.}} |
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