Unusual structures found in a Martian meteorite
A) are thought, potentially, to be fossils of bacteria.
B) include what appear to be living bacterial spores.
C) resemble the chloroplasts of plant cells.
D) show that life on Earth most likely originated on Mars.
A
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Global climate change contributes to each of the following EXCEPT:
a. More severe storms b. Rising sea levels c. Peak petroleum production d. Species extinctions e. Ocean acidification
What is a typical range of pore sizes in rock?
A) 5 micrometers to 100 micrometers B) 0.1 millimeter to 0.8 millimeter C) 0.1 millimeter to 3 centimeters D) 10 millimeters to 5 centimeters
What happens to a river as it flows through a delta and encounters the sea? 
A. The maximum sediment grain size carried by the river increases. B. The total sediment load carried by the river decreases. C. The discharge and water velocity increase. D. All of these choices are correct.
The Coriolis force is caused by
A) the force of gravity between the Earth and the Sun. B) differences in pressure over distance. C) wind speed. D) the rotation of the Earth. E) centripetal acceleration of air masses.