What natural resource has played the largest role in the economies of the Persian Gulf countries? gold natural gas petroleum salt

What forms when magma spreads outward

Conquistadores were natives of what country? england mexico spain france

What is a portion of a country that is separated geographically from the mainland

Knowledge of Earth's interior comes from the study of ___. Knowledge of Earth's interior comes from the study of ___. A. deep wells B. tsunamis C. meteorites and seismic waves D. mountains and trenches

Why do p waves bed when they travel

What three cities form the global centers of economic activity?

Describe and explain the physical and/or chemical methods used to refine the coal

Explain the characteristics of authoritarianism, and identify two Central Asian countries that have this type of government

Why are the rivers so vital to europe's economy?

5x-4+21+90=180, what is it?