QuestionDo you agree or disagree with the following idea: Students at college and high school should take part in a community project such as green summer, military semester or clean-up week, etc., as a required class. Use specific reasons and examples for your answer. Sample essay In relation to community projects at school, many people hold that students should focus on their academic subjects so as to get good grades. However, in my opinion, students should participate in a community project in that it will benefit students in various ways. Undeniably, community projects will be helpf ..read more

Question: Do you agree or disagree with the following statement: Technological devices in communication have harmful effects on the young’s Give details and examples to support your answer Sample essay: The convenience that technological devices bring to our life is out of question. They help our communication carried out quickly and easily. However, considering the effects of technology on our “communication skills” which are measured on the communicating culture and the ability to transform ideas, we can’t help wondering if high-tech devices really have positive influences. Speaking o ..read more

Minerals and Plants Research has shown that certain minerals are required by plants for normal growth and development. The soil is the source of these minerals, which are absorbed by the plant with the water from the soil. Even nitrogen, which is a gas in its elemental state, is normally absorbed from the soil as nitrate ions. Some soils are notoriously deficient in micro nutrients and are therefore unable to support most plant life. So-called serpentine soils, for example, are deficient in calcium, and only plants able to tolerate low levels of this mineral can survive. In modern agriculture ..read more

The Long-Term Stability of Ecosystems Plant communities assemble themselves flexibly, and their particular structure depends on the specific history of the area. Ecologists use the term “succession” to refer to the changes that happen in plant communities and ecosystems over time. The first community in a succession is called a pioneer community, while the long-lived community at the end of succession is called a climax community. Pioneer and successional plant communities are said to change over periods from 1 to 500 years. These changes in plant numbers and the mix of species are cumulative ..read more

Depletion of the Ogallala Aquifer The vast grasslands of the High Plains in the central United States were settled by farmers and ranchers in the 1880s. This region has a semiarid climate, and for 50 years after its settlement, it supported a low-intensity agricultural economy of cattle ranching and wheat farming. In the early twentieth century, however, it was discovered that much of the High Plains was underlain by a huge aquifer (a rock layer containing large quantities of groundwater). This aquifer was named the Ogallala aquifer after the Ogallala Sioux Indians, who once inhabited the reg ..read more

Question: Do you agree or disagree with the following statement? It is better to have a job that you enjoy to do rather than a job with high income. Give reasons and details to support your answer. Sample essay: Many people think finance is the most important element to have a good life. Therefore, a lot of workers are willing to dismiss their family, friends and even current health to get a job with high salary. From my point of view, I disagree with this notion because satisfaction in job, family relationship and life without depending on medical support are more valuable than money if pe ..read more

Mass Extinctions [■] Cases in which many species become extinct within a geologically short interval of time are called mass extinctions. [■] There was one such event at the end of the Cretaceous period (around 70 million years ago). [■] There was another, even larger, mass extinction at the end of the Permian period (around 250 million years ago). [■] The Permian event has attracted much less attention than other mass extinctions because mostly unfamiliar species perished at that time.The fossil record shows at least five mass extinctions in which many families of marine organisms died out. T ..read more

Types of Social Groups Life places us in a complex web of relationships with other people. Our humanness arises out of these relationships in the course of social interaction. Moreover, our humanness must be sustained through social interaction—and fairly constantly so. When an association continues long enough for two people to become linked together by a relatively stable set of expectations, it is called a relationship.People are bound within relationships by two types of bonds: expressive ties and instrumental ties. Expressive ties are social links formed when we emotionally invest ourselv ..read more

Pastoralism in Ancient Inner Eurasia Pastoralism is a lifestyle in which economic activity is based primarily on livestock. Archaeological evidence suggests that by 3000 B.C., and perhaps even earlier, there had emerged on the steppes of Inner Eurasia the distinctive types of pastoralism that were to dominate the region's history for several millennia. Here, the horse was already becoming the animal of prestige in many regions, though sheep, goats, and cattle could also play a vital role. It is the use of horses for transportation and warfare that explains why Inner Eurasian pastoralism proved ..read more

Maya Water Problems To understand the ancient Mayan people who lived in the area that is today southern Mexico and Central America and the ecological difficulties they faced, one must first consider their environment, which we think of as "jungle" or "tropical rainforest." [■]  This view is inaccurate, and the reason proves to be important. [■] Properly speaking, tropical rainforests grow in high-rainfall equatorial areas that remain wet or humid all year round. But the Maya homeland lies more than sixteen hundred kilometers from the equator, at latituacdes 17 to 22 degrees north, in a habitat ..read more