Science 5.4 Flashcards
(17 cards)
List the 4 layers of the atmosphere
Troposphere
Stratosphere
Mesosphere
Thermosphere
Where is the troposphere?
Closest layer to earth
How thick is the troposphere?
Approximately 10km
How much of the atmosphere’s mass is in the troposphere?
75%
Where is the stratosphere?
Just above the troposphere (2nd layer)
Where is the mesosphere?
Just above the stratosphere (3rd layer)
50km above sea level
Where is the thermosphere?
Top layer of the atmosphere
80km above sea level
How high do you have to go to reach outer space?
About 500km above sea level
Which layer of the atmosphere has the ozone layer?
Stratosphere
In which layer of the atmosphere is the air thickest?
Troposphere
What makes white trails behind airplanes?
Water vapour that condenses into liquid
Where to polar auroras happen?
Thermosphere
What happens to meteors when they come into the atmosphere?
Once they hit the mesosphere they disintegrate
Why do planes fly so high?
Because the air is less dense higher up and they encounter less resistance
They save on fuel
What is air composed of?
Nitrogen
Oxygen
Other gases
Carbon dioxide
Which gas makes up 78% of our air?
Nitrogen
What percentage of oxygen is in our air?
21%
