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Apple Demonstration

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Remember we do not live in the ... Renewable resource A resource that the earth can ... Offer a solution for how one organization could establish better practices to ... – PowerPoint PPT presentation

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Title: Apple Demonstration


1
Apple Demonstration
2
Essential Question
  • How do humans change the physical environment?

3
Land vs. Water
  • ¾ of world is water
  • ¼ of world is land
  •  

4
Uninhabitable land
  • Land that people cannot live on.
  • Examples Mountains, Deserts
  • ½ of land is uninhabitable

5
Habitable Land
  • Land that people can live on.
  • 1/8 of world is habitable.

6
Arable Land
  • Land that can grow crops.
  • 1/32 of world is arable.

7
Unarable Land
  • Land that cannot grow crops.

8
Remember we do not live in the core or the
mantle.
9
We live on the crust.
10
Topsoil
  • Not just the soil on Top. ?
  • Soil that has nutrients needed to grow crops.
  •  

11
Renewable resource
  •  A resource that the earth can reproduce.
  • Example Trees

12
Non-renewable resource
  • A resource that the earth cannot reproduce.
  • Example Fossil Fuels

13
Facts on topsoil
  •  Topsoil reproduces at the rate of 1 inch per 500
    years.
  • USA currently loses 1 inch per 16 years.  
  • In 1800 the US had 21 inches of topsoil.
  • In 2000 the US had 6 inches of topsoil.
  • At this rate, the US could have zero topsoil by
    the year 2096.

14
Causes of topsoil loss
  • Deforestation
  • Construction
  • Over-farming
  • Over-grazing

15
Over-Grazing Fact
  • The land used to feed all the cows on the earth
    could grow enough food to feed 8.7 billion humans.

16
Homework
  • Write a letter to the editor explaining the
    problem with topsoil loss.
  • Offer a solution for how one organization could
    establish better practices to help preserve
    topsoil.
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