Lesson 7.01 Layers of the Atmosphere

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1. How much of the earth's atmosphere is nitrogen?
   1. 1%
   2. 50%
   3. 78%
   4. 90%

   Answer: c. 78%

2. Which layer of the atmosphere has temperatures that are constant at 200 degrees Celsius can reach temperatures as high as 1000 degrees Celsius
   1. Thermosphere
   2. Troposphere
   3. Stratosphere
   4. Mesosphere

   Answer: a. Thermosphere

3. Where in the atmosphere is the molecule is th emolecule ozone (O3) located?
   1. Stratosphere
   2. Troposphere
   3. Mesosphere
   4. Thermosphere

   Answer: a. Stratosphere

4. In what atmospheric layer does the earth's weather occur?
   1. Troposphere
   2. Mesosphere
   3. Thermosphere
   4. Stratosphere

   Answer: a. Troposphere

5. Which area of the atmosphere is heated through convection currents?

   1. Stratosphere
   2. Troposphere
   3. Mesosphere
   4. Thermosphere

   Answer: b. Troposphere

6. In which layer of the atmosphere do meteors usually burn out?
   1. Stratosphere
   2. Troposphere
   3. Mesosphere
   4. Thermosphere

   Answer: c. Mesosphere

7. Whhat are the names of clouds sometimes located in the meosphere near the north and south poles?
   1. Noctilucent clouds
   2. thunderheads
   3. citrus clouds
   4. meteors

   Answer: a. Noctilucent clouds

8. Which of the following is a trace element in earth's atmosphere

   1. Oxygen
   2. Methane
   3. Nitrogen
   4. None of these are trace elements

   Answer: b. methane

9. Which layer of the atmoshere makes up between 75-80% of the mass of the earth's atmosphere

   1. Stratosphere
   2. Troposphere
   3. Mesosphere
   4. Thermosphere

   Answer: b. Troposphere

10. Which of the following statements are true for all layers of the earth's atmosphere
    1. as altitude increases, temperature increases
    2. as altitude increases, atmospheric pressure increases
    3. as altitude increases, temperature decreases
    4. as altitude increases, atmospheric pressure decreases

    Answer: d. as altitude increases, atmospheric pressure decreases