Why do so many different types of organisms exist on earth today

Where did early peoples tend to settle

The Gobi Desert spans across these two countries.

How has china's rugged terrain affected its relations with other countries and civilizations

What characteristics of rivers at their source gives them so much power to shape the land?

What is the name of the california lake whose spillways eroded, bringing a potential flood threat to almost 200,000 people?

What is the name for any side of a building that is intended to be looked at?

4. What is the most common element found in the composition of minerals?

How did the moon form?

Platinum can be found in which of the following formations

Which of the following statements about Southern South America is true? A. Uruguay has the lowest level of urbanization of any mainland Latin American country. B. Paraguay is the smallest country of the subregion. C.