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The most abundant gas in the atmosphere is...
Nitrogen
What´s the most external layer of the atmosphere?
Exosphere
In what layer is the ozone layer?
Stratosphere
What´s the name of the closest atmospheric layer to Earth?
Troposphere
The quantity of water vapour found in the air at any given time is...
Humidity
When droplets of dew freeze because the temperature is below 0ºC
Frost
Phenomena by which the atmosphere retains some of the heat from the Sun
Greenhouse effect
Process by which the average temperature of the planet increases
Global warming
It protects Earth against solar radiation (UV rays)
Ozone layer
