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DK Earth: Human Impact

HOW DOES FARMING CHANGE THE LANDSCAPE? HOW DOES INDUSTRY AFFECT THE LANDSCAPE? WHAT CHALLENGES FACE THE HUMAN POPULATION? POLLUTIONGLOBAL WARMINGFIND OUT MOREOver six billion people live on planet…

chromatography

(Encyclopedia) chromatographychromatographykrōˌmətŏgˈrəfē [key], resolution of a chemical mixture into its component compounds by passing it through a system that retards each compound to a varying…

March 2008 Current Events

Here are the key news events of the month organized into three categories: World News, U.S. News, and Business, Society, and Science News. World | Nation | Business/…

Martin Luther King, Jr., Biography

1929—1968, American clergyman and civil rights leader   Dr. Martin Luther King, Jr., prepares to speak to a crowd of 200,000 marchers in Washingtion, DC. Related Links…

Economy 101

The vocabulary of recession   Related Links Currency Quiz A Brief History of U.S. Banking Budgets What Is the Stock Market? Nobel Prize for Economics…

DK Science: Oceans

COASTAL (NERITIC) ZONEOPEN OCEAN ZONESOCEAN CURRENTSTIDESWAVESFIND OUT MOREAbout 71 per cent of our planet’s surface is covered by oceans and seas. In order of size, the five great oceans are…

DK Earth: Rain

WHY DOES IT RAIN? DO SOME PARTS OF THE WORLD RECEIVE MORE RAIN THAN OTHERS? THE WATER CYCLECLOUDSSNOWHAILFIND OUT MOREEarth is unusual among the planets in our Solar System in having an atmosphere…

latitude

(Encyclopedia) latitude, angular distance of any point on the surface of the earth north or south of the equator. The equator is latitude 0°, and the North Pole and South Pole are latitudes 90°N and…

stratosphere

(Encyclopedia) stratospherestratospherestrătˈəsfēr [key], second lowest layer of the earth's atmosphere. The level from which it extends outward varies with latitude; it begins c.51&fslsh;2 mi (9…