If deforestation and fossil fuel burning continue to increase at their current rates, greenhouse gasses in the atmosphere are predicted to ________ by 2050
A) increase 30%
B) triple
C) decrease by 50%
D) double
E) increase 20%
D
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Describe and discuss the formation of the Proterozoic Banded Iron Formations (BIFs). What are
they composed of? Why are these BIFs economically important? What will be an ideal response?
Erosion is the ____
A)movement of weathered material from its source site B)decomposition of soil C)disintegration of rock D)separating of soil into its constituent layers E)process of caliche formation
Comets are asteroids that have gradually gathered water
a. True b. False
The rapid warming associated with the Paleocene-Eocene Thermal Maximum (PETM) likely resulted from
A) decreased surface albedo brought about by Paleocene afforestation. B) the sudden die off of photosynthetic organisms and associated increase in atmospheric CO2. C) a sudden increase in atmospheric carbon. D) several massive volcanic eruptions.