1. Why is water important to the health of the planet?
Lesson Objectives:
To know the main stores and flows of the hydrological cycle
To be aware that the hydrological cycle regulates water supply and links the atmosphere, biosphere and lithosphere
Topic 4: Water World

2. Investigation
In groups, go outside and pour water onto different surfaces. Observe and record what happens in the back of your books
Surface
What happened
Grass
....
Topic 4: Water World

3. Watch the video and note down the key words that describe what happens when water hits the ground The hydrological cycle can be classed as a system with inputs -> stores -> flows -> outputs
Topic 4: Water World

4. The water cycle – more detailed

5. The water cycle – definitions!

6. Drainage basin system interception infiltration surface runoff
precipitation
interception
evapotranspiration
infiltration
surface runoff
throughflow
percolation
river
water table
groundwater flow

7. Drainage basin system inputs precipitation stores and flows
interception
surface runoff
surface water storage
soil water storage
groundwater storage
infiltration
groundwater flow
throughflow
percolation
outputs
river runoff
evaporation
transpiration

8. Drainage basin terms

9. Drainage basin system

10. Task
Draw a large diagram of the hydrological cycle, making sure all inputs, outputs, flows and stores are clearly labelled. Colour it in after you have done this Homework: Underneath your diagram define each of the key words
Topic 4: Water World

11. Odd one out Percolation Infiltration Precipitation
Throughflow Evaporation Interception
Source Mouth Confluence
Tributaries Channel Distributaries
Watershed Catchment River