How were the lesser antilles formed? a. by volcanic mountains. b. by glacier movement. c. by an underwater mountain chain. d. by accumulated sand.

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

Which types of seismic waves travel through earths interior? select all that apply. a) l waves b) p waves c) s waves

What is the process that powers plate tectonics