The Atmosphere Flashcards
What is the atmosphere?
The atmosphere is an encompassing blanket of gases that protect the earth from the harmful rays of the sun
What is lapse rate ?
When the amount of atmospheric gases goes on decreasing and the temperature drops is 1°C per 165m is known as lapse rate
How many layers does the atmosphere have ? Name all of them.
The atmosphere has 5 layers- troposphere,stratosphere,mesosphere,
Thermosphere and the exosphere
Where does the word troposphere come from
The word troposphere comes from the greek word tropein which means to turn,change or mix.
Which layer of the atmosphere protects us from the sun during the day and keeps us warm during night?
The troposphere
All weather phenomena such as ______________________ occur in the ____________________
Clouds,rains,storms
Troposphere
Whats the extent of the stratosphere?
18-50km
Why does the temperature of the stratosphere increase in the upper part ?
This increase in temperature is because of the absorption of the suns harmful UV rays by the ozone gas present in this layer.
The boundary between the troposphere and the stratosphere is called the_______________
Tropopause
In the _______________, the temperature decreases until it reaches -100°C
Mesosphere
Whats the extent of the thermosphere
Extent: 80-500km
In the thermosphere the temperature increase as one goes higher. Why?
This is due to the direct energy of the sun or solar radiation causing atomic particles to be charged.
Temperatures in the thermosphere can rise up to ________________
1,750°C
The upper part of the thermosphere is called the ___________which help in _________________
Ionosphere,transmitting communication signals
_____________ and _______________ are the main gases of the exosphere but they exist in only _________________ due to the absence of _______________
Hydrogen, helium,in small quantities,
Gravity
