How much of the Earth's atmosphere do scientists believe was made of oxygen 2.3 billion years ago?

A.) 70%

B.) 22%

C.) 1%

D.) 10%

What is an example of a new industry in Bangladesh?

Where is a rift valley most likely to occur? A. at a convergent boundary between an oceanic plate and a continental plate B. at a divergent boundary in a continental plate C. at a convergent boundary between two continental plates D.

Which of the following statements best identifies how the growth of the city of Los Angeles affected the Owens River Valley? A.

Why do you usually find volcanoes near subduction zones?

Factories in Latin America that are owned by foreign corporations are called?

How does still water affect glaciations?

What does lava become when it cools A. obsidian B. Basalt C. granite D. all lava could become either for of igneous rock

What sequence of events connects the Industrial Revolution, industrial capitalism, communism, and the Cold War?

A major problem with Wegener's Continental Drift Hypothesis was that he could not find rocks or other geologic features that would have been continuous from one continent to the next if the continents had been together. True / False.

Earlier in the course, you learned that the Hawaiian Island chain stretches far to the northwest and then continues underwater all the way to Asia.