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ch.15
study guide cards.
| Question | Answer |
|---|---|
| list the examples of local winds | sea breeze and land breeze |
| what are auroras and where are they found | auroras are shimmering lights and they come from the ionosphere (Thermosphere) |
| our ozone layer absorbs which type of harmful radiation | ultraviolet rays |
| how much oxygen and carbon dioxide is found in our air | oxygen = 21% carbon dioxide = less then 1% |
| which global wind blows away from the poles to the west | Polar Easterlies |
| what are the two most abundant gasses found in the air | oxygen and nitrogen |
| describe air pressure | it protects us from harmful UV rays |
| what happens to air pressure as altitude increases | it decreases |
| describe jet streams | narrow belts of high speed winds that blow in the upper troposphere and lower stratosphere |
| what is the greenhouse effect | the trapping of the sun's warmth in a planets atmosphere due to the greater transparency the atmosphere to visible radiation from the sun then to infrared radiation emitted from the planet's surface |
| explain the three ways heat is transferred | radiation: the transfer of heat through electromagnetic waves conduction: heat is directly transmitted through a substance convection: the movement of which a warm less dense material rises and a cold less dense material sinks |
| where do trade winds flow toward | trade winds flow toward the west |
| what does the Coriolis effect make the winds do | it makes the winds curve |
| describe the doldrums | the trade winds of the northern and southern hemispheres meet in an area around the equator |
| what is the ozone layer and where is it found | a layer in the earths stratosphere which absorbs most of the ultra violet radiation reaching the earth from the sun |
| describe the thermosphere | above the mesosphere high temperature and below the stratosphere |
| what is the most common atmospheric gas | nitrogen |
| what parts of the earth cools off faster and heats up faster what does this unequal heating create | unequal heating of land and water results to breezes ( sea breeze and land breeze) |
| what is smog | the formation of smoke and fog |
| describe the movement of convection currents | the cycle of warm air rising and cool air sinking causing a circular movement of air |
| which instrument measures air pressure | barometer |
| what is significant about the troposphere | we live here and weather happens here |
| what kind of ways have humans created air pollution | vehicle exhaust, burning of fossil fuels |
| what is another name for the distance above sea level | elevation |
| what are global winds | polar easterlies, westerlies, trade winds |
| what does the name of a wind tell you | where it comes from |
| how much of the suns energy actually reaches the earth | 50% |
| what property are the layers based on | temperature and density |
| which calm area is located around 30 degrees north and south latitude | doldrums |
| what is the atmosphere | a mixture of gasses |
| list 3 global winds and two calm areas | polar easterlies westerlies trade winds horse latitude and doldrums |
| what is global warming | increase in the average temperature of earth |
| if air mass increases what happens to density | density decreases |
| what type of winds blow over short distances | local winds |
| how are all winds created | by heating and the rotation of the earth |
Created by:
200411011
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