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Ch.15

Study Guide

QuestionAnswer
list the examples of local winds Land and sea breeze.
What are auroras and where are they found? Shimmering lights found in the ionosphere (thermosphere)
Our ozone layer absorbs which type of harmful radiation from the sun? uv or ultraviolet rays
How much oxygen and carbon dioxide is found in our air? 21% is oxygen less than 1% is carbon dioxide
Which global wind blows away from the poles to the west? polar easterlies
What are the 2 most abundant gases found in the air? Nitrogen and oxygen
Describe air pressure The measure of the force with which air molecules push on a surface
What happens to air pressure as altitude increases? As altitude icreases air pressure 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 process by which gases in the atmosphere absorb thermal energy
Explain the 3 ways that heat is transferred Conduction = material/direct contact Radiation = EM waves (can’t touch) Convection = energy through liquid or gas
Where do trade winds flow toward? Flow towards the equator
What does the Coriolis Effect make the winds do? Makes winds curve
Describe the doldrums. This is where trade winds meet; on the equator, very light winds - dull
What is the ozone layer? Where is it found? Found in the Stratosphere, layer of oxygen that absorbs most of sun’s UV rays
Describe the thermosphere. Uppermost layer of the atmos. Temp. inc. due to solar radiation. Aurora Borealis occurs here.
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? Land cools and heats fastest; creates wind
What is smog? Polluted air that forms when sunlight reacts with ozone and exhaust
Describe the movement of convection currents. With a heat source, cold sinking dense air pushes warm light less dense air – continues in a cycle
Which instrument measures air pressure? barometer
What is significant about the troposphere we live on it. weather happens here
What kind of ways have humans created air pollution? Burning fossil fuels – exhaust, chemicals
What is another name for the distance above sea level altitude or elevation
What are global winds? Combination of convections cells at every 30 degrees latitude; winds that blow across long distances
What does the name of a wind tell you? Wind name tells you where the wind is coming from
. How much of the sun’s energy actually reaches the Earth? 2biiliont of the sun's energy
What property are the layers of the atmosphere based on temperature
Which calm area is located around 30 degrees north and south latitude? horse latitude
What is the atmosphere? Layer of gases that surround the Earth and protects us from UV and space objects
List the 3 global winds and the 2 calm areas Global winds – polar easterlies, westerlies, trade winds Calm areas – doldrums, horse latitudes
What is global warming? The increase in average temperature on Earth
If air mass increases what happens to density? As air mass increases the density increases
What type of winds blow over short distances local winds
. How are all winds created? Unequal heating of the earth’s surface
Created by: Uchiha Madara