Beginnings
How did Earth get it's atmosphere?
Volcanic outgassing.
A blanket of gases that surround the Earth.
What page of the ESRT tells us about the atmosphere?
page 14.
What layer of the atmosphere do we live in?
Troposphere
What is the outermost layer of Earth’s atmosphere called?
The exosphere.
What is Earth's current atmosphere made of?
Nitrogen and oxygen.
Photosynthesis of blue green bacteria living in Earth's early oceans.
It has layers.
What layer of the atmosphere do airplanes fly in?
Stratosphere
In which atmospheric layer do auroras (Northern and Southern Lights) occur?
The thermosphere.
What was Earth's second atmosphere made of?
Carbon dioxide
How long did it take for blue-green bacteria to put so much oxygen into the air?
millions of years.
Where is the atmosphere most dense?
Closest to the ground, it thins as one moves upwards.
In which layer of the atmosphere does all of the weather happen?
Troposphere
What happens to air pressure as you go higher in the atmosphere?
It decreases exponentially due to fewer gas molecules.
What was Earth's first atmosphere made of?
Hydrogen and helium
Describe the details as to blue-green bacteria's photosynthesis.
The bacteria breathed in the carbon dioxide from the air and breathed out oxygen.
What is the middle layer of the atmosphere called?
How does the temperature of the atmosphere change as you go from the ground up into space?
warm, cold, warm, cold, hot
What protects Earth from harmful solar radiation in the upper atmosphere?
The magnetosphere and the ozone layer.
What happened to Earth's first atmosphere?
Hydrogen and helium are light, they were lost to space. Earth's gravity could not hold onto them.
What is the ozone layer? Where is it in the atmosphere?
The ozone layer is a layer of three oxygens that protect us from the Sun's ultraviolet radiation. It is found in the stratosphere.
Which layer leads to space?
Thermosphere
Why is the ozone layer important?
Ozone protects life from the Sun's ultraviolet radiation.