In fact, atmospheric gases are often divided up into the major, constant components and the highly variable components, as shown in Table 1 and Table 2. ... Scientists divided the atmosphere into four layers according to temperature: troposphere, stratosphere, mesosphere, and thermosphere. ... THE OZONE LAYER The stratosphere contains a thin layer of ozone molecules (with three oxygen atoms) which forms a protective layer shielding life on Earth from the Sun's harmful ultraviolet radiation. ... Some gases in the exosphere actually escape into space. Particles of the solar winds are conc...

• Word Count: 3528
• Approx Pages: 14
• Grade Level: High School

El Niño has unleashed hurricanes and droughts; the greenhouse effect is blamed for rising temperatures; and the thinning of the ozone layer might lead to an increase in skin cancer among humans" ("Today's Science: Global Warming and Ozone Hole Linked "). ... Vegetation also emits carbon dioxide into the air but only accounts for about fifteen-percent" ("What Human Activities Contribute to Climate Change?"). ... Inlets, where the river meets the sea, will widen out, and cause the sea water to flow into rivers and streams. ... The primary cause is the emission of carbon dioxide int...

• Word Count: 3357
• Approx Pages: 13
• Grade Level: High School