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.

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The Atmosphere

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The atmosphere

The Atmosphere

17 November 2014


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.”

17 November 2014


The atmosphere1

The Atmosphere

  • Understand the development of the atmosphere.

  • Learn about the structure & composition of the atmosphere.

  • Consider some of the human impacts on the atmosphere.

17 November 2014


Formation of the atmosphere

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.

17 November 2014


The atmosphere2

The Atmosphere

  • Use page 17 of book to make notes on the 4 layers of the atmosphere; include:

  • Name

  • Location

  • Features e.g composition, wind speeds, air pressure etc.

17 November 2014


The atmosphere

17 November 2014


Human impact on the atmosphere

Human impact on the atmosphere

  • For each factor consider the effects at local, national/regional and global scale.

  • Human activity - ?

17 November 2014


Composition of the atmosphere

Composition of the Atmosphere

  • What gases make up the atmosphere?

  • What is their role/importance?

17 November 2014


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