Tuesday, November 4

 1. How many layers in the atmosphere are there? What are the layers?  2. When you go swimming, where do you feel the most pressure, at the top of the pool or the bottom. Why do you think this is?  3. Explain why you think your ears “pop” when you are flying in a plane or you go higher up in elevation? 

 Greatest pressure  Weather happens here.  The temperature decreases as the altitude increases.

 *OZONE LAYER IS FOUND HERE protecting humans from harmful UV rays.  The temperature increases as you go up  Density and pressure decrease.

 *Meteoroids burn up here  Air density, air pressure, and air temperature decrease with altitude within the mesosphere

 Temperatures within the thermosphere can reach up to 2,000°C, or 3,600°F.  Closest to the sun  Divided into 2 parts – ionosphere & exosphere  Temperature increases with altitude in the thermosphere.  Density and Pressure decrease

 Outermost layer of our atmosphere.  Contain satellites that orbit our planet.  Temperatures remain the same with increasing altitude.  Density and Pressure decrease

 1. You may write on your copy.  2. You will 15 minutes to take the test.

 Put x over the number if it is wrong.  Leave it blank if it is right.

 1. Exosphere9. 5  2. Troposphere10. 78% N, 21% O, and 1% Argon & other gases  3. Mesosphere11. temperature, air pressure  4. Thermosphere Bonus Question 2 Newton  5. Stratosphere  6. Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere.  7. C  8. D

 11/11=100%  10/11= 91%  9/11= 82%  8/11=73%  7/11=64%  6/11=55%  5/11=45%  4/11=36%  3/11=27%  2/11= 18%  1/11= 9%

Air pressure: the weight of the air pressing down on any surface

 Oxygen = air molecule  Nitrogen = air molecule  Argon = air molecule  Carbon dioxide = air molecule

 Density: the mass per unit volume of an object (How much matter takes up a certain space)  As density increases, pressure increases

 Altitude: the height of an object above sea level or the ground  As altitude increases, density and air pressure decreases

Less Air Molecules Less Dense More Dense More Air Molecules Tight Loose

 the force of attraction towards the center of an object, such as the earth or moon THIS IS HOW AIR PUSHES ON US!!!!!  GRAVITY PULLS AIR IN MAKING AIR PRESSURE. Air pressure is the force the particles in the air exert on the surface.

As water is heated, it turns into water vapor which is water in the form of a gas molecule.

 Take 1 minute to discuss with your partner what you think!

Because water vapor takes up space = there is less space for air molecules Water vapor Air molecule

 As water vapor INCREASES, air molecules move further apart.  Air pressure DECREASES as water vapor INCREASES!

Because warmer temperatures, heat up water, increasing the water vapor. Water vapor takes up space = there is less space for air molecules Water vapor Air molecule

 Warm air is less dense than cold air so when temperatures are higher, air pressure is lower

High temperatures  _______ water vapor  ______pressure  ______, ___________, __________.

High temperatures  more water vapor  _________ pressure  ______, ___________, __________.

High temperatures  more water vapor  less pressure  __________, ___________, ___________

High temperatures  more water vapor  less pressure  storms, tornadoes, hurricanes. MORE WATER IN THE AIR!

 High Pressure: Clear, calm weather conditions  Low Pressure: Wet, stormy weather conditions

 Whatever you do not finish becomes homework  Volume is low, THIS IS INDEPENDENT!!!  Raise your hand if you have any questions!  Stay in your seats