Electrical Conductivity Sensor
A liquid with charged particles conducts electricity. An electrical conductivity sensor can be used to detect the flow of charge within a liquid.
Measuring Water Quality to Understand Human Impact
Students build electrical conductivity sensors from wire and drinking straws to measure the impact of human activity on freshwater ecosystems. Students first study and assess the quality of water from a simulated watershed and then from their own community.
How are ocean currents formed?
Build an electrical conductivity sensor with everyday materials. Use it to measure ocean conductivity and how changes in salinity impact currents.