What separates an eon into eras?

a) changes in rock layers

b) spieces extinctions (changes in types of organisms)

c) 300 million year chunks

d) types of plants and animals

After 1650, which country became the world center for art?

Which action by president Andrews Johnson has the greatest impact on reconstruction?

Imagine that you are a bedouin. Write a letter to a friend who lives in Makkah describing a day in your life.

How many states are needed to force congress to call a national convention to propose constitutional amendments?

What was a result of the Hundred Years' War

Congressional powers include what

The ancient species that is considered to be the closest to modern humans is the

4. What was the significance of the Battle of Britain? A. If Germany lost, the British would be able to retake Paris. B. If the German air force won, the German army could invade Britain. C.

1. which of the following would be most useful if you want to understand the climate of Oklahoma? a. the average weather of the state for the past 24 hours b. the average weather of the state for the past 5 days c.

Which of the following resulted from US involvement in the Korean War