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ThoughtWhat happens when you put something heavy on top of something soft?
(Provide example)
You sitting on a bed
Examples:
Pushing down trash in a plastic bag
A jar of mayonnaise on top of a slice of bread
Would you agree that everything has weight?
Defining Atmosphere
The atmosphere is a thin _________ of _______ that forms a protective ______ around the Earth.
Vocabulary Words
• Stratosphere
• Mesosphere
• Troposphere
• Density
• Thermosphere
• Exosphere
• Molecules
Defining DensityDensity is a comparison of how
much matter (molecules) there is in a certain amount of space.
What affect does this have on the atmosphere?
MoleculesThe smallest particle of a substance
that retains the chemical andphysical properties of the substance and is composed of two or moreatoms; a group of like or different atoms held together by chemical
forces.
Troposphere• Starts at earth’s surface and extends 8 to 14.5 kilometers (5-9 miles)
• Contains almost all weather
• Most dense
• Contains nitrogen, oxygen, and other gases
• As you get higher, the temperature drops from about 17 to 52 degrees Celsius
Stratosphere• Starts just above the troposphere and extends to 50 kilometers (31 miles) high
•Dry and less dense than troposphere
• Contains nitrogen, oxygen, and other gases
• Contains the ozone layer
• Temperature decreases to -3 degrees Celsius, due to absorption of ultraviolet radiation
Mesosphere• Starts above stratosphere and extends to 85 kilometers (53 miles)
• Temperatures fall as low as -93 degrees Celsius
• Contains nitrogen and oxygen
Thermosphere• Starts just above the mesosphere and extends to 600 kilometers (372 miles)
• Temperatures increases up to 1, 727 degrees Celsius• Contains nitrogen and oxygen
Beyond the Atmosphere
• Starts at the thermosphere and continues until merging with interplanetary gases, or space
• Hydrogen and Helium are prime components and are only present at extremely low densities
EARTH SURFACE
Troposphere
Stratosphere
Mesosphere
Thermosphere
EXOSPHERE – Outer Space
AtmosphereKey:Nitrogen – OxygenOther Gases