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Passage 21SoilsThere are many different kinds of soils. Different soils have different types of rock and minerals in them than other. Some soils have more water in them than others. Some soils might have more plant and animal material in them, too.
Different kinds of soils are found in different parts of the world. There are several kinds of soils found in the United States. In some areas, the soil has a lot of clay. Other soils are very sandy. Loam is a kind of soil that has a good mixture of clay and sand.
In some places, soil layers are very thick. Lots of plants grow in places with a thick soil layer. In dry and windy places soil layers are much thinner. Layers of soil on mountains are thin because gravity pulls the soil downhill.
The type of soil in a particular place affects what kinds of plants can grow there.
Internet Surfing
Nowadays, there is a growing popularity of Internet surfing on college campus. An increasing number of students, majoring either in science or engineering or in liberal arts, spend many hours surfing the Internet with keen interest everyday.
Internet surfing has attracted college students like magnets because it is the world of Internet and the world of globalization. First,with the global coverage of Internet,we can reach out and touch anyone at any place of the world. Via Internet,we can send and receive E-mails at any time much faster, cheaper and more effective than conventional means such as telephone, telex and fax. Next,via access to the home pages of libraries, universities, journals and news agencies, and research organizations, we can easily acquire all kinds of information, to know what is going on all over the world. Finally, by clicking the mouse, we are capable of doing such important things as shopping, finding jobs, making friends, down-loading files and programs, doing business, publishing papers and freely airing our opinions on all sorts of interesting issues. What is more, Internet offers many opportunities. For example, we can work, educate ourselves and communicate with others at home via Internet.
In the Information Age, it is difficult to imagine modern life without Internet. With the rapid development of Information Technology industry, successful dot-com companies mushroomed everywhere. Internet is revolutionizing our economy, our society and our life.