Lesson+Quiz+Week+5

=Distance Learning Quiz - Week 5= Below is what you submitted to dl@pisgahforestinstitute.org on Friday, March 21, 2008 at 16:14:56


 * Topic:** Atmosphere
 * Subtopic:** Atmospheric Structure, Weather
 * Name:** Kim Collazo
 * E-mail:** kscollazo@gmail.com
 * Question 1:** The atmosphere is the gaseous layer surrounding any planet or other celestial body. Air is the invisible, odorless mixture of gases that surround only the Earth.
 * Question 2 :** The Earth's atmospheric convection currents occurs as the sun's heat which is concentrated near the Equator causes the air to expand and rise. It then radiates toward space, spreading toward the north and south poles. As it rises further out, it begins to cool and become more dense, "sinking" back toward the surface of the Earth.
 * Question 3:** The Earth's atmosphere is designed in such a way that it allows energy in the form of heat from the sun in, but then acts as a shield, not allowing much to be radiated back out. This helps keep our planet's temperature balanced in such a way to allow for the vast lifeforms that exist here.
 * Question 4:** Most weather occurs in the troposphere.
 * Question 5:** Heat transfer occurs in three ways. Radiation is the direct transfer of energy by electromagnetic waves. Conduction is the direct transfer of heat by direct contact of particles of matter. Convection is the transfer of heat by the actual motion of fluid (liquid or gas)in the form of currents.
 * Question 6:** If the Earth's surface is experiencing a low-pressure system, the air is rising.
 * Question 7:** Climate is the typical weather pattern in a given location as documented over at least 30 years. It is general and long term. Weather is specific and short term. It is the state of the atmosphere at a given time and place.
 * Question 8:** People on Mt. Everest experience colder weather even though they are closer to the sun due to the fact that the sun is really not the main heat source. Radiation bouncing off the Earth's surface is actually the heat supply, and the higher you are in elevation, the further you are from the surrounding surface of the Earth where the heat is greatest.
 * Question 9:** Warm air is able to hold more moisture because it is less dense. The molecules are spread out allowing for greater room for moisture.
 * Question 10:** Specific humidity is the actual amount of moisture in the air. It is measured by finding the number of grams of water vapor per 1 kilogram of air.

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