PDF chapter test TRY NOW
Fill in the blanks with the correct option given below in the table:
| Soil | Lithosphere | 290 | 65 |
| triatomic | ozonosphere | oxygen | calcium carbonate |
| photolysis | stratosphere | poisonous | Chemical |
| oxygen | Aquatic | Venus | 21 |
1. The biogeochemical process, which explains about the oxygen circulation, is known as __________ cycle.
2. In our solar system, __________ also has a thin layer of ozone.
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