More hydrothermal resources exist in the Western regions of the United States because lack of groundwater and extended drought has reduced the number of vents.
Spaniards were the ruling class in Mexico, and comprised of people born in Spain who moved there. They were the only class allowed to hold government positions
Creoles were people of Spanish descent who were born in Mexico, and were treated less then Spaniards.
Mestizos were people of both Spanish and Indian descent and were looked down upon by both the Creoles and the Spaniards
A current of air, especially a natural one that moves along or parallel to the ground, moving from an area of high pressure to an area of low pressure. Surface wind<span> is measured by anemometers or its effect on objects, such as trees.</span>