In this activity, students construct a simple, effective moisture sensor that is then used to give warning of dry, damp or wet conditions.
By the end of this activity, students should be able to:
- construct a simple moisture sensor
- conduct a series of experiments to investigate how various moisture sensors work.
Download the Word file (see below) for:
- introduction/background notes
- what you need and what to do
- student worksheets.
Read about the research in Satellite sensing – using remote sensing to make measurements ranging from storm damage to pasture growth. Sensing the Earth explores other techniques – like infrared, radar and sonar – used to map and monitor the Earth’s structures, including New Zealand’s seismic activity.
Sensing robots tells the story of MARVIN – a Mobile Autonomous Vehicle for Indoor Navigation. Mechatronics explains the combination of electronics, computer programming and mechanics that make robots like MARVIN function.
Controlling resistance explores the concept of variable resistance by using a simple electrical circuit.
You can also use micro:bit sensors to measure soil moisture.