5. Recently, some areas in the United States have seen an increase in trees due to reforestation efforts. How
might the carbon cycle be altered after a large-scale
reforestation effort? Select all correct answers.
a. Atmospheric carbon dioxide levels would
decrease because the new trees would absorb
carbon dioxide during photosynthesis.
b. Atmospheric carbon dioxide levels would stay
the same because the new trees would absorb
as much carbon dioxide as they produce.
c. Atmospheric carbon dioxide levels would
decrease as trees grew larger and more
carbon was stored in wood.
d. Atmospheric carbon dioxide levels would
increase as new trees allowed ecosystems to
support an equal number of new animals.

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

Which of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano