geog_exam1[1][1] - 1 Maryam Khokhar GEOG 1111 Dr.Hodler...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Maryam Khokhar GEOG 1111 Dr.Hodler Summer 09 Exam I Terms 7 1. Atmospheric profile: pg.62-64 Read the diagram: composition ( Homosphere and Heterosphere), Temperature ( Troposphere, stratosphere, mesosphere, and thermosphere), Function ( Ozonosphere, and Ionosphere) 2. Homosphere: A zone of atmosphere from earth’s surface up to 80km (50 mi) composed of an even mixture of gases, including nitrogen, oxygen, argon, carbon dioxide, and trace gases. 3. Heterosphere: A zone of the atmosphere above the mesopause 80km (50 mi) in altitude; composed of rarefied layers of oxygen atoms and nitrogen molecules; includes the ionosphere. 4. Exosphere: an extremely rarefied outer atmospheric halo beyond the thermosphere at an altitude of 480 km (300 mi); probably composed of hydrogen and helium atoms, with some oxygen atoms and nitrogen molecules present near the thermopause. 5. Troposphere: the home of the biosphere; the lowest layer of the Homosphere, containing approximately 90% of the total mass of the atmosphere; extends up to the tropopause; occurring at an altitude of 18 km ( 11 mi) at the equator, 13 km ( 8 mi) in the middle latitudes, and at lower altitudes near the poles. 6. Tropopause: the top layer of the troposphere defined by temperature; wherever -57Celcious (- 70F) occurs. 7. Mesosphere: The upper region of the Homosphere from 50 to 80km (30 to 50 mi) above the ground; designated by temperature criteria; atmosphere extremely rarified. 8. Stratosphere: the portion of the Homosphere that ranges from 20 to 50 km ( 12.5 to 30 mi) above earth’s surface, with temperature ranging from -57C and -70F at the tropopause to 0C ( 32F) at the stratopause. The functional ozonosphere is within the stratosphere. 9. Normal lapse rate: the average rate of temperature decrease with increasing altitude in the lower atmosphere; an average value of 6.4C per km, or 1000 m (3.5F per 1000 ft.). (Compare environmental lapse rate).
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 10. Environmental lapse rate: the actual lapse rate in the lower atmosphere at any particular time under local weather conditions; may deviate above or below the normal lapse rate of 6.4 C per 1000 m ( 3.5 F per 1000 ft).( compare normal lapse rate. 11. Atmospheric pressure (density& altitude): ph 64, 67 measurement of the weight of the atmosphere, lower layer is denser because it has more weight on it but as you come up the density decrease because the weight is much less. 12. Components of Homosphere: read the table 3.2, the nitrogen and oxygen make up of 99% of our atmosphere. 13. Components of ionosphere: absorbs cosmic rays, gamma rays, X-rays, some UV rays. Components of ozonosphere: Part of stratosphere, ozone absorbs UV energy and converts in to heat energy.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 9

geog_exam1[1][1] - 1 Maryam Khokhar GEOG 1111 Dr.Hodler...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online