Middle School Earth Science Teacher Guide

(PS-3851)

Features 13 core activities covering the fundamental topics of weather & climate, seismology & topography, soil properties and more.

Water, the Universal Solvent

Lab Summary

Use a conductivity sensor to classify substances based on their ability to dissolve in water and measure the changes in the conductivity of water as substances dissolve in it.

Theory

In this activity, students:

  • Classify substances based on their ability to dissolve in water
  • Measure the changes in the conductivity of water as substances dissolve in it
  • Relate water's ability to dissolve different substances to some geological formations

Method

Students gain experience conducting the following procedures:

  • Dissolving a variety of substances in water
  • Observing the solvent and solute as the dissolving process occurs
  • Setting up the equipment and work area to measure the level of conductivity in different solutions
  • Measuring the conductivity level of three different solutions

Sensors / Equipment Used:

PASPORT Conductivity Sensor

(PS-2116A)

Utilizes platinum probes for greater range and improved accuracy in high & low concentrations.

The Associated Bundle:

Middle School Science Standard Sensor Bundle

(PS-2933A)

This bundle contains the probeware needed to perform all 49 lab activities in the Middle School Science through Inquiry lab manual.

Interface Required

This experiment may require software and an interface for data collection.