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 continent was once joined with Greenland? How do you know?

Why is the flooding of the Brahmaputra important

describe two ways that rain water that falls on the land transported to the ocen without first entering the atmosphere

The areas of dense population in China are A. Eastern low land areas with a predominantly human sub tropical climate B Plateau regions with cool, dry climates C coastal regions with tropical wet climates D Mountain regions with semi arid climates

What is the square root of 12 million

When the Europeans traveled the Mississippi and the Amazon rivers, what did they bring to the native peoples of both continents? A. Gifts and wisdom B. Exotic plants and animals C. Smallpox and other disease D. Technology and knowledge

What are the major controlling factors for the variations of the water mass in the ocean?

The climatic effect that influences precipitation and air flow locally is

Does oceanwater contain any other minerals than salt

What comes to bedsides icy bridges battlefronts and crumbling bridges?