... what we call weather occurs in the troposphere. The uneven heating of the regions of the troposphere by the Sun causes convection currents and winds. Warm air from Earth's surface rises and cold air above it rushes in to replace it. When warm air reaches the tropopause, it cannot ... the exosphere are the Van Allan Belts and are held in place by Earth's magnetic field. ATMOSPHERIC PRESSURE (Murao, Vivencio) Atmospheric pressure, sometimes also called barometric pressure, is the pressure exerted by the weight of air in the atmosphere of Earth (or that of another planet). In most ... fou...

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• Grade Level: High School

... weather because of its atmosphere and magnetic field. Mars does not have a global magnetic field to protect the plane from effects of the Sun such as solar flares. Mars also does not have an ozone layer. These factors cause the planet's weather system to be erratic. Mars was not always without a magnetic ... water vapor in the air, dust is the driving force behind storm activity as it heats the atmosphere by absorbing sunlight. Like Earth hot air that rises at the planet's equator is replaced with cooler air. Trade winds result from the cooler air to circulate the dust. Dust storms cause ...

• Word Count: 4020
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• Has Bibliography
• Grade Level: High School

... the atmosphere during eruptions. The most abundant gas typically released into the atmosphere from volcanic systems is water vapor (H20), followed by carbon dioxide (C02) and sulfur dioxide (S02). Volcanoes also release smaller amounts of others gases, including hydrogen sulfide (H2S), hydrogen (H2), carbon monoxide (CO), hydrogen chloride (HCL), hydrogen fluoride (HF), and helium (He). All this gases together with ... acid droplets), compounds attached to tephra particles, and microscopic salt particles (BBC Monitoring Latin America - Political Supplied by BBC Worldwide Monitoring). V...

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... a large sheet of ice that moves very, very slowly. Some melting glaciers add more water to the ocean. Warmer temperatures also make water expand. When water expands in the ocean, it takes up more space and the level of the sea rises. Sea level may rise as much as 2 feet during the next century. This will effect both natural systems and manmade ... with preventing and treating health problems. Very young children and the elderly adults will run the highest risks. Gases in the atmosphere such as carbon dioxide and methane trap the sun's energy and warm the earth. This natural "greenhouse ...

• Word Count: 3240
• Approx Pages: 13
• Grade Level: Undergraduate