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Recent Homework Help articles

04/01/2014 - 2:32pm

How does a flashlight work?
By using a battery hooked up to an electrical circuit system.

How does an electrical circuit system work?
A battery has negative electric charges and positive electric charges. If you look at a battery, you will see that there is a + sign at one end and a - sign at the other. The opposite charges are drawn to each other, but without an easy path, they will remain separated. That's where a circuit comes in handy.

A Power-full Bridge

03/11/2014 - 2:08pm

Cells make up you, your friend, your hamster, and your mom's broccoli surprise. If it's alive or ever was alive, it is made of cells. Space scientists looking for life on Mars are trying to find simple cells-- not little green men, and biologists who search for cures to diseases work with cells. Small as they are, cells determine how life unfolds from its beginning to its end.

02/28/2014 - 1:14pm

Circles, squares, pentagons, octagons, polygons, angles, rays, points, and lines, there are so many names to learn in geometry. They may sound strange and new, but geometry is all around you. Your computer monitor's surface is more or less a rectangle, your pencil is roughly a cylinder, and, viewed from the top, the cable from your mouse to the computer, is a line segment.  Once you start thinking about geometric shapes, you'll find them everywhere.

01/17/2014 - 12:02pm

What kinds of people settled the new lands of America? They had their own ideas about laws, religion, and what makes a good government. They were, in a word, independent.
In 1776, England was faraway, and people on this side of the Atlantic were heartily sick and tired of paying taxes on top of taxes to finance England's empty treasury. They were tired, too, of losing money by having the Crown interfere with their trade overseas. The men in the assemblies shouted that King George was a tyrant, so the King's men stopped the assemblies. When they still protested, the King brought in the army, making the colonists put them up in their houses. Any crimes the soldiers committed against the colonists were handled in the King's court by the King's judges.

12/05/2013 - 10:56am
You know, because you've been told, that the Earth revolves around the Sun. You also probably know that planets other than our own have moons, and the way to test to see whether or not something is true is by experimenting. Thousands of years ago, these things were not widely known. The heavens above were anyone's guess, and the way things were was just the way the gods had made them. It was felt there was no need to truly understand them or put them in any kind of order.

10/31/2013 - 10:45am

Rome grew from a small band of villages in central Italy to the greatest empire of its time. Roman law and sciences spread throughout the Western World, changing forever the ways of the Europeans and North Africans. Romans built coloniae (colonies) on their western frontier by very strict standards, making certain that the people who lived there knew they were a part of the Empire. The ruins of Roman forts and bath houses can be found in England, at the edges of Roman rule, and the parts of the great Roman roads can still be seen today.

10/16/2013 - 1:54pm

In 1800, the land held by the new United States was small compared to what was called Louisiana. Louisiana was named for King Louis XIV. It was part of a large claimed area in the New World called New France. It stretched from the Great Lakes to the Gulf of Mexico and from the Appalachian Mountains to the Rocky Mountains.

09/19/2013 - 1:19pm

Columbus Day is sometimes called Discoverers' Day. In the spirit of discovery, take some time to learn about the world as it was in the days of the European explorers. You can make a compass, learn about the stars, read about other explorers and discoverers, and find how even our way of eating has changed since the Europeans came to the Americas looking for gold, glory, and, yes, tasty cooking spices.

Pizza Without Tomato Sauce?

The explorers who came to the Americas found the food enjoyed by the native people to be very different from what they knew at home. They had never seen tomatoes, potatoes, sweet potatoes, maize (corn), pineapples, chili peppers, or even cocoa. The vegetable dishes from the Europe they knew relied on parsnips, cabbages, peas, carrots, turnips, and onions. After being at sea and living off of a diet of lentil soup, salt beef from a barrel, salted sardines, hardtack, and other delights, the fresh, new foods of the islands would have been an astonishing change.

09/18/2013 - 12:33pm

By Jane Kosa

Pocahontas, the Powhatan princess who befriended the Jamestown colonists, married the Englishman John Rolfe in 1614, and is believed by many to have saved John Smith's life -- that is why the world knows the Powhatan Confederacy. Her father, Powhatan, almost alone, united the small scattered Algonquian tribes of present-day Virginia and Delaware into a thirty tribe group in the late 1500s. We know this group as the Powhatan Confederacy. The Confederacy included 128 Algonquian villages and 20,000+ people at its peak in the early 1600s.

09/12/2013 - 10:45am

How does rain happen? Long ago the Ashanti people believed that Anansi, the Spider, brought the rains that would put out fires in the jungle. In old Britain, the legendary Green Man was supposed to have rainmaking powers, and Zeus brought the rains for the ancient Greeks.

Today, we know that when warm, wet air rises into the sky and cools off, its water condenses out of the clouds as rain. Rain and snow can also happen when a batch of warm air meets a batch of cool air. The two kinds of air usually do not mix. The warm air is less dense than the cool air and will slide right over it. As the warm air goes higher, it cools off, and the moisture separates or condenses out of the cooled air and falls as a slow, steady rain.