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Principle
Heavy-metal ions may be carried into surface or ground water from mining fields or via the waste water of galvanicor similar production sites. They block the effect of enzymes so that the processes in the metabolism of the organisms that are controlle ...
This experiment shows how much the quality of drinking water of various locations in the same region can vary. The comparison of tap water with bottled mineral water and distilled water leads to surprising results.
The altitude profile of a hiking trail or route to school can be measured during a school trip or as an exercise for the students. The altitude profile can also be used to demonstrate that the atmospheric pressure decreases when the altitude increases ...
The weather sensor can be used to determine the height of a tower as a function of the change in air pressure with the aid of the barometric formula.
The compact Cobra4 "Weather" multisensor can be employed as a simple means to setup a weather station, which can then be used to explain the relationship between the air pressure, humidity, temperature, and the light intensity. The measurement combina ...
The drawing of maps is one of the favourite tasks of the students during geography lessons and of a high didactic value. The altitude measuring function of the Cobra4 Sensor-Unit "Weather" is a user-friendly tool which provides altitude values so that ...
Why are there only a few different kinds of plants in a deciduous forest? Except for having trees that are all approximately of the same height, hardly any other plants grow in a deciduous forest, except for young plants of the same type of trees. Th ...
The pH value (a measure of the concentration of hydrogen ions) in running waters depends on the geological conditions, the pollution load that is caused by agricultural production, and on plant activities. This experiment shows how the pH value of a ...
How does the temperature of the air affect the temperature of the soil in the course of a day?
Information concerning the quality of soils is of great importance for agricultural production. The students are familiarised with this subject via two experiments with pH measurements that show how much soils may differ from each other (experiment&n ...
How suitable are certain soils and plant substrates for the nutrition of plants? This experiment is about measuring the conductivity, which in turn provides information as to which of the examined soils and plant substrates already contain nutrient sa ...
Bogs and fens are habitats of plants that are specialised in soils with constant excess water. Apart from this specialisation, bogs and fens differ significantly from each other. Raised bogs and fens, for example, have different plant communities, whi ...
This experiment examines why people suffer from earaches during take-off and landing, as well as from dry eyes during long flights.
This experiment shows how the salt that is washed out of an abandoned potassium rock pile drastically increases the salinity of a watercourse, as well as how the salinity decreases only slightly further downstream, and how the salinity can still be me ...
We are dealing here with circuit learning for four work groups. Use is made of the Cobra4 Sensor-Units and Mobile-Link handheld measuring instruments that are provided in the environment and outdoors experimentation case. One of each of the instrument ...
PHYWE presents the new x-ray unit: innovative technology, top safety, maximum comfort!
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