Water cycle models
In science, a model is a representation of an idea, an object, a process or a system. Models are often used when it is difficult to see or experience the real thing. Although we live in the middle of the water cycle, it is difficult for students to see aspects of it in action because they either happen underground or involve invisible processes (transpiration and evaporation) and gravity – a non-contact force.
In this activity, students draw a representation of the water cycle onto resealable bags. The bags are placed in a sunny location and enable students to model how the Sun’s energy and the force of gravity drive aspects of the water cycle.
Modelling the water cycle
Using a plastic bag, students can model the water cycle. When the plastic bag is hung in a sunny window, heat from the Sun evaporates water from the lake and forms condensation and precipitation.
By the end of this activity, students should be able to:
draw some of the features of the water cycle
discuss the role of the Sun in the water cycle
discuss the role of gravity in the water cycle
make predictions about what might happen with their model
explain how their model is similar/different to the actual water cycle.
Download the Word file (see link below).
Activity idea
Another way to visualise underground components of the water cycle is by constructing an aquifer model.
Water in nature challenges ākonga to design a working model that shows the processes of the water cycle.
Acknowledgement
This activity has been developed in partnership with the Waikato Regional Council as part of the Rivers and Us resource.
Waikato Regional Council
Waikato Regional Council is a local government body. They work with communities, iwi and industry to sustainably manage natural resources, enabling a strong economy and a high quality of life for all. Their activities help look after the region's water, soil, air, geothermal areas and coasts.
