What happened around 800 million years after Earth formed to allow rocks to

form?

O

A. Life began to appear.

O

B. The sun dimmed considerably.

D

C. Earth cooled sufficiently.

D. The ozone layer formed.

How do constructive and destructive forces inside Earth to the rock cycle?

Economists suggest that the Egyptian government A) bring in more skilled workers B) find alternate solutions C) give visas to anyone willing to move to another country D) import food since farmers cannot keep up with supply and demand

If Champaign, IL were to be relocated directly to the west so that it was now located along the west coast of the US right next to the Pacific Ocean, what would happen to Champaign's yearly temperature variations? a.

Which three river systems form the northern plains? Explain the diverse relief features of the Northern Plains.

In the past five years, 30 percent of the worlds newly discovered oil reserves have come from? a. the Cape of good hope b. the gulf of Aden c. central Africa d. the Gulf of Guinea

The internet and cell phones are examples of what media

What is the difference between the windward and leeward side of a mountain?

In the region made up of the United States and Canada, what large area lacks major cities? A. Northern Canada, B. Southwestern U. S., C. southeastern Canada, or D. eastern U. S.

What is the average rainfall in winter in Ireland

Which is the main purpose for global positioning technology?