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Level 75

Air Pressure & the Layers of the AtmospHere


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nitrogen
1s2 2s2 2p3
Oxygen
1s2 2s2 2p2
Water Vapor
The gas form of water(H2O).
Ultraviolet Radiation
Rays thrown by the sun that can be harmful to living organisms.
Exosphere
The highest layer of the atmosphere and is part of the Thermosphere.
Ionosphere
The second highest layer in the Earth's atmosphere. Auroras appear in this layer when particles shot from the Sun hits atoms in the Ionosphere. People use this layer to reflect radio waves so they travel longer distances.
Troposphere
The lowest layer in the Earth's atmosphere.This layer allows weather to happen.The temperature gets colder as altitude increases.It is the layer that we live in.
Air pressure
Collisions of particles around earth
Density
amount of mass per units volume
Mass
the amount of matter an object has - weight
Volume
A measure of space (lwh)
altitude
Air pressure is affected by...
What is the composition of the Earth's atmosphere?
The Earth's atmosphere is 78% nitrogen,21% Oxygen,and 1% other gases.
How is the atmosphere important to life on earth?
The atmosphere has and keeps all the vital gases for life on Earth.It also protects us from harmful UV rays.
What are the properties of air?(What can you measure about air?)
Air is a gas that can be measured by weight,mass,density,volume, and pressure.
How does the density of air change as you go higher in altitude?
The air pressure gets less dense as you go up causing air pressure to drop.
How does air pressure change as you go higher in altitude?
Air pressure drops about one-tenth every 1,000 meters.(EX:At the top of mount Kilimanjaro,the air pressure is 40% of what is at sea level.)
What are the characteristics of each layer of the atmosphere?
The Troposphere is where weather occurs,the Stratosphere is where the ozone layer is located,the Mesosphere is where meteors burn up,the Ionosphere is where aurora borealis occurs and radio waves reflect and travel,and the Exosphere is where satellites fly.
How does the temperature change from layer to layer?
The temperature cools to about -60 celsius,then it warms to about 0 celsius,then cools to about -90 celsius,and then heats up to more than 100 celsius.