Download DOC - hss-1.us

Practice Test 1
NAME: ______________________ Date ___________ ___________
Composition of the Air:
1. What is the difference between the terms "air" and "atmosphere"?
2. What is the correct chemical composition of the dry air constitutes in percent near the surface of the earth?
3. What percent does water vapor make up of the air near the surface of the earth for dry desert condition ions to
very warm and moist s maritime tropical conditions? That is, what is the % range of water vapor?
4. Explain why Water Vapor (H20 gas) why are Carbon Dioxide (CO2) and Ozone (O3) are all important gases
in the atmosphere?
5. The concentration of carbon dioxide in the air is currently about 392 ppm (parts per million). Briefly describe
what this means.
6. On a given day the concentration of water vapor 1%. Convert that values into ppm and compare to the
concentration of CO2.
7. The concentration of nitrogen oxides in the air on a given day is about 0.018 ppm. What is that in percent?
Structure of the atmosphere
8. List the Four Thermal Layers and their heat source.
1
9. On the diagram below draw a line show the average temperature versus height from the surface to 120 km
(7.5 miles). Show the location of the heating source for each layer.
Ht
Pres
Ft - Km
T °C-100°
-80°
-60°
-40°
-20°
0°
20°
10. Calculate the vertical temperature gradient (temperature lapse rate) per 1000 m between each of the
following height levels: 1000 m = 10˚C, 2000 m = 2˚C, 3000 m = 5˚C
Use Lapse Rate = Tlower-Tupper/Heightupper - Heigthlower
11. What is dimension pressure? How are pressure and force related? Why is it a dimension?
12. What are the units of pressure? How are the units related to the dimension?
13. Math Given that a person weighs 150 lbs and each of his feet are approximately a rectangle of 2.5 inches by
10 inches what pressure does the person exert on the floor in lbs per square inch? (covert this to N/m2 (Pascals)
using 1 pound per square inch = 6 894.75729 pascals
14. If approximate the pressure at sea level which is about 14.7 lbs/inch2 as 15 lbs/inch2 , how many times more
pressure does the air exert than the 150 lb person?
2
15. What is "mean sea level pressure"? Give its value in atmospheres (ATM), PSI, mb, Pa and Torr
16. What will happen to atmospheric pressure if the temperature is constant and water vapor (humidity) is added
to the air? Why?
17. Layers of the atmosphere: Match the terms with the correct definition: Homosphere, Heterosphere,
Troposphere, Stratosphere, Mesosphere, Thermosphere, Ionosphere, Ozone Layer
_________________ the layer that reaches highest temperature of the atmosphere
_________________ The layer of earth’s atmosphere that has the same ratio of gas molecules with height and
which exists from ground level to roughly 80 kilometers (50 miles) above sea level
_________________ the layer of earth’s atmosphere that has a changing ratio of gas molecules with height
and which exists higher than roughly 80 kilometers (50 miles) above sea level
____________________ the layer that reaches the coldest temperature of the atmosphere
____________________ the layer of the atmosphere that you live in and where most of the weather processes
that create the weather take place.
____________________ the layer that intercepts high energy particles is the source of the processes that heats
the thermosphere.
____________________ the layer that warms with height due to ozone; acts as a ‘cap’ on the weather
___________
_____________ the layer that protects us from UV light and is the source of the processes
that heat the stratosphere.
18. _______ ______________ are narrow bands of high-speed winds, located at the boundary of the
troposphere and stratosphere (tropopause), that circle the earth, and generally blow ( move) from west to east.
19. (circle one) If you want to study Earth’s weather, which region of the atmosphere would you usually study?
exosphere
mesosphere
stratosphere
thermosphere
troposphere
20. (circle one) If you want to study the ozone layer, which region of the atmosphere would you study?
exosphere
mesosphere
stratosphere
thermosphere
troposphere
21. (circle three)
Which regions of the atmosphere are in the homosphere?
exosphere
mesosphere
stratosphere
thermosphere
troposphere
22. (circle two) Which regions of the atmosphere are in the heterosphere?
exosphere
mesosphere
stratosphere
thermosphere
troposphere
23. If a sample of air is predominately oxygen, did it most likely come from the homosphere or the
heterosphere?
24. A barometer develops a leak in the column which is supposed to be free of air. As air seeps into the column,
what will happen to the height of the liquid in that column?
25. (circle one) In what region of the atmosphere does temperature increase with increasing altitude because of
the ozone layer?
exosphere
mesosphere
stratosphere
thermosphere
troposphere
3