• They also provide shelter from the sun, block wind and noise, provide a habitat for wildlife, smell good, create beauty and prevent erosion. • They also clean the air by stopping a lot of flying dust particles etc from flying. ... Little did they know that their actions would cause water tables started to rise, bringing salt to the surface. ... (This is also known as the "phloem.") ... If the soil is too dry, not enough water will rise to a full tree height, and the vegetation that grows in that area will be shorter species, like brushy chaparral (a shrub). ...

• Word Count: 2774
• Approx Pages: 11
• Grade Level: High School

Tropical rain forests are also by far the most threatened. ... The daily temperature averages in at seventy-five degrees, with twelve hours of sun shining everyday in the tropics. ... With excessive amounts of carbon dioxide in the atmosphere, the sun's heat is trapped, preventing it from radiating back into space. ... With an increasing number of cattle on the rise, it is indeed a driving force for others. ... The increasing attack on rain forests is also bringing a rapid rise in the rate of which species are disappearing. ...

• Word Count: 3373
• Approx Pages: 13
• Has Bibliography

Tropical rain forests are also by far the most threatened. ... The daily temperature averages in at seventy-five degrees, with twelve hours of sun shining everyday in the tropics. ... With excessive amounts of carbon dioxide in the atmosphere, the sun's heat is trapped, preventing it from radiating back into space. ... With an increasing number of cattle on the rise, it is indeed a driving force for others. ... The increasing attack on rain forests is also bringing a rapid rise in the rate of which species are disappearing. ...

• Word Count: 3257
• Approx Pages: 13
• Has Bibliography

There is a temperature gradient from the equator to the poles because of the earth's orientation toward sun. ... Equatorial air rises and, deflected, falls back to the surface in temperate latitudes, where it then flows toward the east. ... Thus in hot weather thermals rise, and water condenses and falls as showers; also precipitation increases up mountainsides. ... The degree of seasonality also has a major effect. ... There is also lowered diversity on peninsulas and islands because of problems of historical access. ...

• Word Count: 12375
• Approx Pages: 50
• Has Bibliography
• Grade Level: Undergraduate