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Home arrow Geography arrow The handy geography answer book

How does water wash away the land?

Drops of rain hit soil and rock and displace grains. When water flows over the surface, it loosens and carries away pieces of rock or soil. There is a tremendous amount of energy in a raindrop. Over days, weeks, months, years, centuries, and millennia, the erosive power of water can cut through even the strongest rocks. The material that the flowing water picks up is eventually deposited when the flow of the stream slows down—this is known as deposition.

How tall is the tallest waterfall in the United States?

Yosemite Falls in California has a height of 2,425 feet (739 meters).

How much does a gallon of water weigh?

Water is quite a heavy substance. One gallon of water at room temperature weighs about 8.33 pounds (3.78 kilograms).

How is water used in the home?

About 41 percent of household water is used for flushing the toilets; 37 percent is used for bathing; and the remaining 22 percent is used for washing dishes (six percent), drinking and cooking (five percent), laundry (four percent), cleaning (three percent), lawn and garden usage (two percent), and other purposes.

What waterfall has the largest flow of water?

Niagara Falls, on the border of Canada and the United States between Lake Ontario and Lake Erie, has 212,000 cubic feet (6,000 cubic meters) of water flowing over its 173- and 182-foot-high (52.7- 55.5-meter-high) set of falls (there are two adjacent waterfalls).

What is the highest waterfall in the world?

The highest falls in the world are Angel Falls in southeast Venezuela. It is 3,230 feet (984 meters) high.

How does the boiling point of water help determine altitude?

The boiling point of water at sea level is 212° Fahrenheit. The boiling point drops about one degree for every 500-foot (152-meter) increase in altitude. Therefore, in Denver, at 5,280 feet (1,609 meters) above sea level (Denver is called the Mile High city because there are 5,280 feet in a mile), water boils at about 202°. The change in the boiling point is why cooking instructions are modified for higher altitudes.

OCEANS AND SEAS

What is the difference between an ocean and a sea?

While a sea can be any body of salt water, it usually refers to a body of salt water partially or completely enclosed by land. Oceans, though they can also be referred to as seas, are large areas of salt water, unobstructed by continents.

How many oceans are there?

The seas and oceans of the world are actually one big "world ocean" because they are connected. Most of the time the world ocean is divided into four main parts: the Pacific, Indian, Atlantic, and Arctic. By far the largest is the Pacific Ocean, more than twice the size of the Atlantic. The Indian is third in size, followed by the tiny Arctic Ocean.

How salty is sea water?

About 3.5 percent of the weight of seawater is salt (not just sodium chloride or table salt, but also potassium chloride, calcium chloride, and other types of salts). This would equal just over three and one-third cups of salt in one gallon of sea water.

What are ocean currents?

The oceans don't remain still; their water is constantly moving in giant circles known as currents. In the Northern Hemisphere, currents move clockwise, while in the Southern Hemisphere they move counterclockwise. Currents help to moderate temperatures on land in places like the British Isles—which are farther north than the U.S.-Canadian border—by sending warm water from the Caribbean northeast across the Atlantic Ocean to northern Europe. A current known as the Antarctic Circumpolar Current circles the southern continent. The North Atlantic and North Pacific oceans each have a large clockwise current, while the South Atlantic and South Pacific oceans each have a large counterclockwise current.

 
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