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Questions and Answers
Questions and Answers
What is the primary cause of Ozone depletion in the stratosphere?
What is the primary cause of Ozone depletion in the stratosphere?
- Excessive emission of CO2
- Increase in use of CFCs (correct)
- Natural variability in atmospheric composition
- Depletion of oxygen in the stratosphere
How is Ozone formed in the stratosphere?
How is Ozone formed in the stratosphere?
- By photo decomposition of oxygen molecules (correct)
- By combustion of carbon dioxide
- By precipitation of water vapor
- By condensation of nitrogen gas
What happens when chlorine and bromine atoms come in contact with Ozone?
What happens when chlorine and bromine atoms come in contact with Ozone?
- They enhance Ozone production
- They convert Ozone to oxygen
- They destroy Ozone molecules (correct)
- They have no effect on Ozone
What is the primary cause of Ozone depletion in the stratosphere?
What is the primary cause of Ozone depletion in the stratosphere?
How is Ozone formed in the stratosphere?
How is Ozone formed in the stratosphere?
What happens when chlorine and bromine atoms come in contact with Ozone?
What happens when chlorine and bromine atoms come in contact with Ozone?
What is the function of the Ozone layer in the stratosphere?
What is the function of the Ozone layer in the stratosphere?
How are biodegradable substances defined?
How are biodegradable substances defined?
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Study Notes
Study Notes
Ozone Depletion
- The primary cause of ozone depletion in the stratosphere is the release of chlorofluorocarbons (CFCs) and other halogenated gases, which contain chlorine and bromine atoms.
Ozone Formation
- Ozone (O3) is formed in the stratosphere when oxygen molecules (O2) are split by ultraviolet radiation, resulting in oxygen atoms that react with other oxygen molecules to form ozone.
Ozone Depletion Process
- When chlorine and bromine atoms come in contact with ozone, they catalytically destroy ozone molecules, breaking them down into oxygen molecules, leading to ozone depletion.
Function of Ozone Layer
- The ozone layer in the stratosphere acts as a shield, absorbing most of the sun's ultraviolet-B radiation, protecting life on Earth from its harmful effects.
Biodegradable Substances
- Biodegradable substances are materials that can be broken down naturally by microorganisms, such as bacteria, fungi, or yeast, into simpler substances like carbon dioxide, water, and biomass.
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