The Atmosphere
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Mr Rylatt March 22, 2022 The Atmosphere
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The Atmosphere. “Don’t knock the weather; ninety percent of people couldn’t start a conversation if it didn’t change once in a while.”. “Water and air, the 2 essential fluids on which all life depends, have become global garbage cans.”. The Atmosphere. - PowerPoint PPT Presentation
Transcript of The Atmosphere
Mr Rylatt April 19, 2023
The Atmosphere
Mr Rylatt April 19, 2023
“Don’t knock the weather; ninety percent of people couldn’t start a conversation if it didn’t change once in a while.”
“Water and air, the 2 essential fluids on which all life depends, have become global garbage cans.”
Mr Rylatt April 19, 2023
The Atmosphere
1. Understand the development of the atmosphere.
2. Learn about the structure & composition of the atmosphere.
3. Consider some of the human impacts on the atmosphere.
Mr Rylatt April 19, 2023
Formation of the Atmosphere
• 5 billion years ago – no atmosphere• Volcanic eruptions released gases & UV
radiation levels v. high – no life forms.• Early atmosphere 5-4.5 billion yrs BP
– Water vapour 80%– Carbon dioxide 12%– Sulphur dioxide 7%– Nitrogen 1% & other trace gases
• UV radiation reduced and early organisms used CO2 and released O2 – atmosphere slowly developed that could support plant and animal life.
Mr Rylatt April 19, 2023
The Atmosphere
Use page 17 of book to make notes on the 4 layers of the atmosphere; include:
a) Nameb) Locationc) Features e.g composition,
wind speeds, air pressure etc.
Mr Rylatt April 19, 2023
Human impact on the atmosphere
• For each factor consider the effects at local, national/regional and global scale.
• Human activity - ?
Mr Rylatt April 19, 2023
Composition of the Atmosphere
• What gases make up the atmosphere?
• What is their role/importance?
