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Ozone is created and destroyed in the stratosphere. The English mathematician and geophysisist, Sidney Chapman, investigated and described this cycle. Because of his work, the cycle is called the "Chapman-Cycle".
The flash animation below shows the Chapman-Cycle and all the important steps in it.
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2. © 2003 Seesing, Tausch, Universität-Duisburg-Essen, Duisburg
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Add the missing words to the text. The missing words are:
ozone molecule ; ozone molecules; cracking of ozone; oxygen atom ; oxygen atom; oxygen atoms; oxygen atoms; oxygen molecule ; oxygen molecule; oxygen molecule; oxygen molecules; UV-light ; UV-light; energy; energy; wavelength
- High-energy (short wave) UV-light can crack (breakdown) ________________________ into ________________________.
- If an ________________________, an ________________________ and a heavy weight particle impact in a "triple collision" an ________________________ is formed. The heavy weight particle can be a dust particle, or another big gas molecule such as nitrogen gas.
- The heavy weight particle absorbs the ________________________, which becomes free during ozone formation. It delivers the ________________________slowly to the environment afterwards.
- ________________________ can be broken down similarly by _______________________. The ________________________needed by this do not need to have as much energy as they do to breakdown oxygen molecules into oxygen atoms. The ________________________can be larger. The products of this ______________________ are an ______________________ and an_______________________.
- When two ________________________collide, an ________________________is formed.
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Explain briefly which form of energy in the stratosphere is converted into warmth by the Chapman-Cycle.
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About this page:
authors: M. Seesing, M. Tausch - Universität Duisburg-Essen, Duisburg, Germany
last update: 2004-05-13
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