Multiple Choice
Carbon dioxide (CO2) concentration in the atmosphere increased from 280 parts per million (ppm) in 1750 to 400 ppm in 2013. How has this change affected the oceans?
A) movement of CO2 from the ocean to the atmosphere has decreased the pH of ocean waters
B) movement of CO2 from the atmosphere to the ocean has decreased the pH of ocean waters
C) movement of CO2 from the ocean to the atmosphere has increased the pH of ocean waters
D) movement of CO2 from the atmosphere to the ocean has increased the pH of ocean waters
Correct Answer:

Verified
Correct Answer:
Verified
Q24: Select the example of a positive feedback
Q25: Hindcasting is a scientific technique used to<br>A)
Q26: Water absorbs more heat than ice, which
Q27: Select the example of a proxy indicator
Q28: Prior to the Industrial Revolution, the addition
Q30: Which proxy indicates a past period of
Q31: Select the correct statement regarding hurricane activity
Q32: In response to a warming climate, the
Q33: Proxies are used to<br>A) directly measure temperature<br>B)
Q34: Consider how your personal transportation, home energy