Ozone hole problem

VC5.3.2.2
Ozone hole problem
Ozone hole problem

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Description

In experiment C5.3.2.2, the UV-IR-VIS experimentation kit is used to demonstrate the absorption of UV-C radiation by ozone and the formation and decomposition of ozone. The ozone layer in the stratosphere (at a height of 15 to 50 km) is vitally important to life on Earth. Without its protective effect, strong short-wave UV radiation would make life outside of water impossible. The ozone layer acts as a filter for radiation from 220 to 310 nm. As a result it completely absorbs UV-C radiation (220 nm to 280 nm) and absorbs most of the UV-B radiation (280 nm to 320 nm).

For that reason, a reduction in the ozone concentration (ozone depletion, „ozone hole“) is increasing the intensity of biologically effective UV-B radiation. This can damage plants, thereby reducing harvest yields. Phytoplankton (types of algae at shallow ocean depths) are also affected – an important link in the food chain of the sea. Because it also absorbs a considerable quantity of carbon dioxide, it represents an integral part of the carbon cycle and plays a role in the greenhouse effect.
Ozone forms in the stratosphere by the effect of hard UV radiation on oxygen.

Components of equipment sets

1 666265 UV-IR-VIS experiment kit LD
1 524018  8  Pocket-CASSY 2 Bluetooth LD
1 524220  4  CASSY Lab 2 LD
1 524019 * Rechargeable battery for Pocket-CASSY 2 Bluetooth LD
1 5240031  4  * Bluetooth dongle LD
1 5240511  4  Lux adapter S LD
1 666246  4  UV-C sensor LD
1 667818 Spark gap supply unit LD
1 500621  4  Safety connecting lead, 50 cm, red LD
1 500622  4  Safety connecting lead, 50 cm, blue LD
1 667489  4  Crocodile clips, insulated, set of 2 LD
1 667241  4  Rubber bellows, single bulb LD
1 665957  4  Disposable syringe, 1 ml, with Luer fitting LD
1 603030  4  Cannulae, 0.6 mm diam., set of 10 LD
1 6716600  4  Dichloromethane, 250 ml LD
1 additionally required: PC with Windows 7 or higher

Articles marked with * are not essential, we do however recommend them to carry out the experiment.

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) C5.3.2.2 Ozone hole problem
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