Related to atmospheric CO2 content?
What will be an ideal response?
Vostok results showed that atmospheric CO2 and CH4 concentrations have varied in concert with surface temperature. As levels of the greenhouse gases CO2 and CH4 increased, the magnitude of the greenhouse effect also increased, and the climate became warmer. But the temperature curve actually leads the CO2 curve slightly, indicating that cause and effect are mixed up in this record. This is a prime example of why we need to consider the entire coupled system,
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The _______________ dominated global politics from the 1950s to 1990.
Fill in the blank(s) with the appropriate word(s).
According to this hypothesis, early modern humans established separate populations throughout
Eurasia, and had occasional interbreeding between populations:a. Eurasian origination hypothesis b. migrational hypotheses c. multiregional hypothesis d. out of Africa hypothesis e. tandem evolution hypothesis
________ is the flow of water-saturated soil over impermeable material.
A. Solifluction B. Landslide C. Creep D. Rockslide
Which rock type is formed from magma, for example, granite and basalt?
a. Sedimentary b. Igneous c. Metamorphic d. Phosphorus