Look through the text once again and entitle its paragraphs.
Write out the sentences expressing the main idea(s) of each paragraph.
Complete the following sentences.
1. Common methods for ozone generation are … .
2. The most common method for the production of ozone is … because … .
3. Oxygen is pumped off from the mixture whereas ozone is liquefied due to … .
4. Ozone has a characteristic odour which provides a warning of … .
5. Four resonance structures explain … .
6. Ozone is especially destructive to … .
7. Ozone removes … from sunlight and absorbs … .
8. The ozone belt plays a major role in ... .
Retell the text briefly in your own words making use of the key words and the sentences you have written out.
Speak on the following topics.
1. Methods of Obtaining Oxygen.
2. The Application of Oxygen.
3. The Difference between Oxygen and Ozone.
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