Nitrogen gas is most commonly found in which of earth spheres

Which two Midwestern states have limestone? Texas Ohio Michigan Illinois Indiana

What civilization is considered the mother-culture of pre-Hispanic Mexico? A. Maya B. Olmec C. Aztec D. San Lorenzo

How did the Egyptians use technology to "tame" the Nile River?

Which of the following must result in a lower base level for rivers and streams? A) sea level drops; land subsides B) sea levelfalls; land rises C) sea level rises; land subsidesD) sea level rises; land rises

Which scale is used to describe the intensity of an earthquake? A. Richter scale B. Mercalli scale C. intensity scale D. destruction scale

Lines of latitude and longitude form a pattern called a

Why is Bristol an important international city

Why are environmental issues a major concern for people of Sub-Saharan Africa?

Which revelation resulted from the observation of the spectrum of different galaxies? A. there were more galaxies whose spectrum was blueshifted B. there were no galaxies whose spectrum was redshifted C.

Why are people are able to live in deserts, mountains, and tundras?