The appearance of banded iron layers in the rock record between 1.08 and 3.8 billion years ago reflect the alteration of oxygen-rich and oxygen-poor conditions in the ocean at that time.

True or False

Which of the following is not an example of a historically ethnically diverse country in Europe?

What percentage of earth's water is usable freshwater?

Which forces cause bulging of the earth at the equator

What part of South America has a Mediterranean climate? the Pacific coast of northern Chile the coastal plains south of the Atacama Desert the selva of the Amazon River basin the high plateaus of the Andes

Describe the athenian justice system

A certain igneous rock contains about 25 percent dark silicate minerals. The remainder of the rock is mostly plagioclase feldspar. What type of composition does the igneous rock have?

Wind erosion removes the least fertile part of soil. true or false

How were economic developments in Taiwan and South Korea during the 1900s similar and different?

How does the growth of walmart demonstrate the geographic concept of distance decay

This simple experiment is an example of what process on Earth?