This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ture throughout the Vostok record is consistent
and predictable. The absolute temperature changes,
however, are from 5 to 14 times greater than would be
expected on the basis of carbon dioxide‘s own ability to
absorb infrared radiation, or radiant heat. This reaction
suggests that, quite aside from changes in heat-trapping
gases, commonly known as greenhouse gases, certain
positive feedbacks are also amplifying the temperature
change. Such feedbacks might involve ice on land and sea,
clouds, or water vapor, which also absorb radiant heat.
Other data from the Vostok core show that methane
gas also correlates closely with temperature and carbon
dioxide. The methane concentration nearly doubled, for
example, between the peak of the penultimate glacial
period and the following interglacial period. Within the
200 F or the following question, consider each of the 5. It can be inferred from the passage that a long-term choices separately and select all that apply decrease in the concentration of carbon dioxide in 3. The passage p rovides information to support which the Earth‘s atmosphere would of the following statements about methane EXCEPT? (A) increase methane concentration in the
Earth‘s atmosphere A Methane is more effective than carbon dioxide (B) accompany a period of glaciation in absorbing radiant heat. (C) encourage the formation of more oxygen
isotopes in the Earth‘s atmosphere B The higher the concentration of carbon dioxide
in the Earth‘s atmosphere; the lower the (D) promote the formation of more water in the
Earth‘s global environment concentration of methane.
C Most of the global warming that has occurred (E) increase the amount of infrared radiation
absorbed by the Earth‘s atmosphere during the past 10 years has been associated with
increased methane concentration. 6. The passage suggests that when the methane
concentration in the Earth‘s atmosphere 4. According to the passage, which of the following
statements best describes the relationship between decreases, which of the following also carbon dioxide and global temperature? happens? (A) Carbon dioxide levels change immediately (A) Glaciers melt faster. in response to changes in temperature. (B) The concentration of carbon dioxide increases. (B) Carbon dioxide levels correlate with global (C) The mean global temperature decreases. temperature during cooling periods only. (D) Carbon dioxide absorbs more radiant beat
(E) More clouds form in the Earth‘s atmosphere (C) Once carbon dioxide levels increase, they
remain high regardless of changes in global
(D)Carbon dioxide levels increase more quickly
than global temperature does.
(E) During cooling periods, carbon dioxide levels
initially remain high and then decline. 201 7. The author‘s assertions concerning the conditions The essential condition for the decay of the vacuum is
the presence of an intense electric field. As a result of the that lead to the decay of the vacuum would be decay of the vacuum, the...
View Full Document
- Fall '13