What evidence in rocks supports the theory of seafloor spreading?

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.

What is the approximate chemical composition of the solar nebula?

Amajor rite of passage for the maori men of was to receive ta moko, or facial tattoos. a. australia b. new zealand c. papua new guinea d. southeast asia