Geography GCSE
Lag Time
What Lag Time means in Geography GCSE, as defined for Pearson Edexcel.
Definitions of Lag Time
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
The time difference between peak rainfall and peak river discharge on a hydrograph.
The time delay between peak rainfall and peak discharge on a hydrograph.
The time difference between peak rainfall and peak river discharge.
Topics that use Lag Time
- A variety of physical processes interact to shape river landscapes (Pearson Edexcel GCSE)
- Distinctive river landscapes are the outcome of the interaction between physical and human processes (Pearson Edexcel GCSE)
- Human activities can lead to changes in river landscapes which affect people and the environment (Pearson Edexcel GCSE)
Related terms
Using Lag Time in the exam
Definition questions usually carry one or two marks, and examiners look for the precise wording. Write the definition from memory, check it against the version above, and then use the term in a longer answer on the same topic so it sticks.
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