Leaming Task 1. Read each item carefully and write it before the number.
1. What is the most abundant element in the Earth's atmosphere? B. Carbon dioxide C. Nitrogen A Argon
2. What is the correct order of Earth's atmospheric layers from bottom to top? A. Stratosphere, Mesosphere, Troposphere, Thermosphere, Exosphere B Stratosphere, Troposphere, Thermosphere, Mesosphere, Exosphere C. Troposphere, Mesosphere, Stratosphere, Thermosphere, Exosphere D. Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere 3. Which layer of the atmosphere contains the ozone layer? A. Mesosphere B. Stratosphere
4. In which layer do virtually all weather phenomena take place? A. Exosphere B. Mesosphere C. Stratosphere D. Troposphere
5. In which atmospheric layer is most water vapor found? A. Troposphere B. Stratosphere C. Mesosphere D. Thermosphere
6. What is meant by 'trace' gases? A. They are not harmful. C. They are naturally occurring on Earth. B. They are emitted by trees. D. They are present in very small amounts.
7. What is the basis for the division of the layers of the atmosphere surrounding Earth? A. changing temperature C. changing amount of oxygen B. changing weather patterns D. changing composition
8. Why is the presence of ozone above the troposphere important for the survival of living things on earth? A. It warms Earth's surface. C. It makes jet flying more comfortable. B. It helps in cloud formation. D. It offers protection from the Sun's harmful UV rays. C. Thermosphere D. Oxygen D. Troposphere