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`Name:________________________________________________Period:_____________Date:___________

Atmospheric Structure and Composition

Directions:

1. Label your graph paper as follows: Remember that each block except for the edges are 10 squares high and 10 squares long.

| | | | |

| 0 |14 |90 |-82 |

|10 |-47 |100 |-53 |

|20 |-58 |125 |95 |

|30 |-47 |150 |185 |

|40 |-10 |175 |315 |

|50 |3 |200 |500 |

|60 |-19 |250 |750 |

|70 |-57 |300 |1000 |

|80 |-93 | | |

|Altitude |Density |

|0 |10 3.5 |

|20 |10 2 |

|40 |10 1 |

|60 |10 –0.5 |

|80 |10 –1.5 |

|100 |10 -3 |

|150 |10 –5.5 |

|200 |10 -7 |

3. Find and color the following layers of the atmosphere:

Troposphere: 0-18 km Mesosphere: 50 – 80 km

Stratosphere: 18 – 50 km Thermosphere: 80 - ~ 400 km

***Make sure to match the color to the layer in the key.

4. On your graph, draw and label the objects shown in the picture below.

[pic]

5. Answer the following questions. (You may need to use your book for some of these)

1. Name the layer of the atmosphere in which you would most likely find each of the following:

a. Snow, rain, sleet, hail, and a variety of clouds

b. Reliable protection from severe burning from sunlight

c. Streamers of light called the northern lights

d. Working station for astronauts

e. Reflection of waves for worldwide radio communications (2 layers)

f. Ozone gas (2 layers)

g. Strong, steady winds, with very few weather changes

2. Why is the troposphere less thick at the poles than it is at the equator?

3. Why does temperature rise with altitude in the stratosphere layer?

4. Why does temperature rise with altitude in the thermosphere?

5. In the ionosphere, how does the air become ionized?

6. How does the ionosphere help radio stations?

7. Which type of wave is not reflected by the ionosphere?

8. Up to an altitude of 80 km, air is composed of the same percentage of gases. Make a pie chart and key representing these specific gases and their percentage by volume.

9. Above 80 km, describe what happens to the air. Consider both density and composition.

10. How much of the atmosphere's weight is found within 32 km of Earth's surface?

11. Is ozone gas beneficial or harmful to human beings? Why?

12. How can the thicknesses of the ozone layer change?

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Temperature ( o C )

Density ( g/m 3 )

Altitude ( km )

Space for Key

and Name

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