Sec 1 geog unit 3 lesson 2

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Unit 3 Part 2

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  • http://www.pub.gov.sg/water/pages/localcatchment.aspx
  • http://www.youtube.com/watch?v=2EFzf4ncmhE2 min turtle hunting http://www.youtube.com/watch?v=LKYubNapenUForest fast food vid 1 minhttp://www.youtube.com/watch?v=Y7Yf8tvI3EI2 min paper making
  • 14 min vid on shifting cultivation in laos
  • Sec 1 geog unit 3 lesson 2

    1. 1. Unit 3 Part 2 Uses of Tropical Rainforests
    2. 2. By the end of this section, you will be able to: 1. Explain what is water catchment 2. Describe the role of rainforests in the oxygen cycle 3. List and explain the importance of rainforests 
    3. 3.      An area that is drained by a river and the tributaries (smaller rivers that flow into it). Trees in a rainforest reduce surface runoff. Rain is dripped into the ground via the trees. Groundwater storage is large in rainforests. Impurities in rainwater are filtered by soil before entering reservoirs. ◦ Seletar and Peirce Reservoirs.
    4. 4. PG 80
    5. 5.  Visit the website on Pg 80 to learn how Singapore increased its watcher catchment from half to two-thirds of our land surface in 2011.
    6. 6.       Rainforests help recycle oxygen. In the day, photosynthesis takes place Rainforest take in carbon dioxide and produce oxygen This helps reduce the total amount of carbon dioxide in the environment. Human industrial activity releases large amount of carbon dioxide, we need the rainforests. Rainforests absorb 2.4 billion tonnes of carbon dioxide in a year.
    7. 7.  Flora ◦ Plants species  Fauna ◦ Animals, insects species    Rainforest are home to over 2 million species of Flora and Fauna. Many of these species have yet to be properly studied by mankind. Deforestation leads to the loss (extinction) of many species
    8. 8. 1. 2. Ample sunlight in the rainforests allow for rapid flora growth. The large amount of flora serves as food for fauna. The continuous canopy also serves as a habitat of flora and fauna
    9. 9.  Humans who live in the rainforest.  Original inhabitants of the country.  Rainforest provide them with their daily necessities ◦ Food, clothing, medicine
    10. 10.  People who do not grow food.  Engage in hunting of animals for meat by the men.  Gathering of wild fruits and vegetation for food by women and children.
    11. 11.      People who grow their own plants for food and medicine. Clearing of small plots of land through burning. Ash from burning provides fertilizer for crops. When land is no longer fertile, it is allowed to fallow. New plot is selected and process is repeated.
    12. 12. Rainforest provide wood for fuel  Rainforest provide 20% of global industrial timber  ◦ Tropical hardwood (teak, ebony, mahogany, meranti) ◦ Very expensive and valuable ◦ Durable and strong. ◦ Used for furniture, doors, construction.
    13. 13.  Tropical rainforests are also known as the world’s largest pharmacy  Source of the world’s medicines  Many plants have yet to be studied for their medical properties.
    14. 14.  Turn to Pg 84 of your textbook  Read the newsreport by Tom Phillips.  Answer the 3 questions on pg 85 on your own. ◦ Write the answer down in your textbook. ◦ 10 minutes
    15. 15. 1. 2. 3. What is water catchment? Describe the role of rainforests in the oxygen cycle. List and explain the importance of rainforests.
    16. 16.  Review Section 2  Next lesson you will have a mini test for Section 2

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