Which of the following is a major cause of increasing ocean acidification?
A. eutrophication
B. construction of dams and levees
C. rising sea level
D. rising levels of CO2
E. decreasing dissolved oxygen
Answer: D
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How long does an ENSO event typically last?
a. 1 month b. 6 months c. 1 year d. 3 years e. 6 years
Surface waves are used to analyze the Earth's interior structure
Indicate whether the statement is true or false
Which of the following best describes the climate in the Great Plains?
A) Mild year round with dry summers and wet winters B) Dry with extreme temperature differences between the seasons C) Dry, frigid winters with periods of high rainfall in the summer. D) Mild winters with dry, hot summers.
Xerophytic vegetation is most likely to be found in which of the following climatic regions?
a. tropical rainforest b. tropical savanna c. steppe d. desert