continents


The large parts of the surface of the Earth that rise above sea level. The seven major continents are Africa, Antarctica, Asia, Australia, Europe, North America, and South America.

notes for continents

Continents are made from the lightest rocks in the Earth. Some of these are also the oldest known rocks on Earth, with an age of 3.5 billion years, measured by radioactive dating.

notes for continents

According to the theory of plate tectonics, continents move along piggy-back on the tectonic plates like rafts floating on water.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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