Ozone Layer Formation and Depletion_Unsolved Paper
Chapter: Our Environment | Topic: Ozone Layer Formation and Depletion
OZONE LAYER FORMATION AND DEPLETION_UNSOLVED PAPER
Topic: Ozone Layer Formation and Depletion
Q1. Where is the ozone layer mainly found?
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
Q2. Which type of radiation from the Sun can be harmful to living organisms and is absorbed significantly by ozone?
- Radio waves
- Ultraviolet radiation
- Sound waves
- Infrared waves
Q3. Ozone is represented by which chemical formula?
- O₂
- O₃
- CO₂
- H₂O
Q4. Which human-made substances have been strongly associated with the depletion of stratospheric ozone?
- Chlorofluorocarbons
- Oxygen molecules
- Water vapour
- Nitrogen gas
Q5. A refrigerator or air-conditioner manufactured using certain older cooling chemicals could contribute to ozone depletion because some refrigerants may:
- Release substances that damage ozone in the atmosphere
- Increase oxygen production by plants
- Absorb all visible sunlight
- Increase soil fertility
Q6. Which international effort is associated with controlling substances that deplete the ozone layer?
- Montreal Protocol
- Kyoto School Programme
- Green Revolution
- Paris Peace Agreement
Short questions
Q1. What is ozone? Where is the protective ozone layer located in the atmosphere?
Q2. How is ozone formed in the upper atmosphere? Mention the role of ultraviolet radiation in this process.
Q3. Why is the ozone layer important for living organisms on Earth?
Q4. What is meant by ozone depletion? Name one group of chemicals that has contributed significantly to this problem.
Q5. A family is replacing an old cooling appliance with a newer, more environmentally friendly model. How can choosing suitable technology help in protecting the ozone layer?
Q6. Why should students learn about ozone depletion even though the ozone layer is far above the Earth's surface? Give two reasons.
Q1. Describe the formation of ozone in the stratosphere. Explain how the ozone layer helps protect life on Earth from harmful solar radiation.
Q2. Explain how human activities can contribute to ozone layer depletion. Discuss the possible effects of increased ultraviolet radiation on living organisms and the environment.
Q3. Ozone depletion is an environmental issue that requires cooperation between countries. Explain why international action is important in protecting the ozone layer. Also discuss how responsible choices by industries and individuals can contribute to its protection.
Q1. During an environmental awareness activity, a school surveys 200 households about the cooling appliances they use. Out of these, 150 households report that they have replaced older appliances with newer models.
(a) What percentage of households have replaced their older appliances?
(b) What percentage have not yet replaced them?
Q2. A science club prepares a record of ozone-related awareness activities in four school houses:
(a) Calculate the total number of participating students.
(b) Which house has the highest participation?
Q3. A city awareness campaign distributes 1,000 information leaflets about protecting the ozone layer. On the first day, 40% of the leaflets are distributed, and on the second day, another 35% are distributed.