The recent volcanic activity in Yellowstone National Park is caused by

Net convergence of air would cause surface pressure to __________ and net divergence would

cause surface pressure to __________. a. increase, decrease b. increase, increase c. decrease, decrease d. decrease, increase

What has happened to U.S. savings rates since the 1980s?

A) They have declined steadily, and were at zero in 2004. B) They have increased steadily, and were at 4% in 2005. C) After increasing up until 2000, savings rates have dropped to near zero since. D) After declining dramatically until 2000, they are back up and are now at an all-time high. E) They have held steady at 7%.

If a moving glacier reaches a body of water, ________ float free.

A. infants B. end moraines C. crystals D. icebergs E. calves

Which of the following is true regarding the relationship between molecular motion, wavelength, and temperature?

A. as temperature increases, molecular motion decreases, wavelength decreases B. as temperature increases, molecular motion increases, wavelength decreases C. as temperature decreases, molecular motion decreases, wavelength decreases D. as temperature decreases, molecular motion increases, wavelength increases