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Equipment

Participating teachers were provided a classroom set of five Palm M130 handheld computers and a five user ProbeScience Water Quality Learning kit

The combination of a Palm handheld computer and an Imagiworks Sensor Interface allows students make measurements using many different types of probes. The sensor interface reads analog voltages from the sensors, converts the voltages to digital values, and transmits the values to the Palm computer. The data collected is displayed on the handheld computer can be saved on the handheld of transferred to a desktop computer.
The pH probe measures pH, an indicator of the acidity or alkalinity of a solution. Examples of activities using the pH sensor include studies of household acids and bases, acid-base titrations, monitoring pH change in an aquarium due to photosynthesis, and studies of water quality in streams and lakes.
The Dissolved Oxygen (DO) Probe measures the concentration of dissolved oxygen in water samples. The concentration of dissolved oxygen is one of the primary indicators of the quality of an aquatic environment. Examples of activities using the DO probe include a study of the relationship between dissolved oxygen concentration and temperature of a water sample and in the field measurements of dissolved oxygen concentration in a stream or lake.
The temperature probe can be used to conduct a wide variety of experiments. Here students use temperature probes to study endothermic and exothermic chemical reactions.
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