5. Which layer of the atmosphere contains the ozone layer?
A. Mesosphere B. Stratosphere
C. Thermosphere
6. Why is the presence of ozone above the troposphere important for the survival
living things on Earth?
A. It warms Earth's surface.
B. It offers protection from the Sun's harmful UV rays.
C. It helps in cloud formation
7. Which of the following correctly describes the stratosphere?
A. It is an atmospheric ozone layer.
B. It has high concentration of ionized particles.
C. It has a layer important to telecommunications.
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