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
Unit 3 Part 2
Uses of Tropical Rainforests
By the end of this section, you will be
1. Explain what is water catchment
2. Describe the role of rainforests in the
3. List and explain the importance of
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
Groundwater storage is large in rainforests.
Impurities in rainwater are filtered by soil
before entering reservoirs.
◦ Seletar and Peirce Reservoirs.
Visit the website on Pg 80 to learn how
Singapore increased its watcher catchment
from half to two-thirds of our land surface in
Rainforests help recycle oxygen.
In the day, photosynthesis takes place
Rainforest take in carbon dioxide and
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 absorb 2.4 billion tonnes of
carbon dioxide in a year.
◦ Plants species
◦ 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
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
who live in the rainforest.
Original inhabitants of the
Rainforest provide them with their
◦ Food, clothing, medicine
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
People who grow their own plants for food
Clearing of small plots of land through
Ash from burning provides fertilizer for
When land is no longer fertile, it is allowed
New plot is selected and process is
Rainforest provide wood for fuel
Rainforest provide 20% of global
◦ Tropical hardwood (teak, ebony,
◦ Very expensive and valuable
◦ Durable and strong.
◦ Used for furniture, doors, construction.
rainforests are also
known as the world’s largest
Source of the world’s medicines
Many plants have yet to be
studied for their medical
to Pg 84 of your textbook
Read the newsreport by Tom
Answer the 3 questions on pg 85
on your own.
◦ Write the answer down in your
◦ 10 minutes
What is water catchment?
Describe the role of
rainforests in the oxygen
List and explain the
importance of rainforests.
Next lesson you will have
a mini test for Section 2