over the last 250 million years, the world changed from a single land mass to a number of different continents. One reason for the change is expanding ocean floors. What causes ocean floors to expand?

American urbanization during the first half of the 19th century was made possible primarily because of advances in A) consumer electricity. B) food preparation and hygiene. C) military weapons and tactics. D) public and private transportation

A foliated metamorphic rock has the minerals lined up in distinct layers or bands. true or false

One reason that Canada is well-suited to working with other nations is because of its

Describe how the chemical composition of Earth's interior differs from its physical properties. Include specific examples.

Which statement is true? A - Rual areas around urban areas often become urbanized. B - Rural areas around urban areas never become urbanized. C - Rural areas around urban areas rapidly lose population.

How does having a large lake or an ocean nearby affect the climate of an area?

In order to conquer Mexico, the Spanish

The climate of the United States can be best Described as. A. mostly arid B. mostly tundra C. Mostly Temperature D. Mostly tropical

Who is Nathaniel Greene

Who was one of the founders of the location-sharing site Foursquare? Dennis Crowley Aaron Swartz Josh Williams Scott Raymond Done answer A.