Which of these features was formed by continental-continental crust collisions?
the grand canyon
the big island of hawaii
the appalachian mountains
the himalaya mountain range

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

Which event had the greatest impact on culture of south america