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In the Know
The Economy and the Stock Market
In the news, you might hear the words stock market and economy. What do these terms mean? How are they different? Economy An economy is a system in which people earn money to pay for … Read more
In the Know
Greenland: The Land of Giant Glaciers
Greenland is surrounded by the North Atlantic Ocean and the Arctic Ocean. It is a part of the continent of North America. It is the world’s largest island. It is 836,330 square miles. That … Read more
In the Know
Summer Travel: How Does GPS Work?
A Global Positioning System (GPS) is a system with three parts: satellites, ground stations, and receivers. More than 30 satellites circle Earth. They send out constant signals. Ground stations use radar to track the satellites. … Read more