Sec 1 g_-_unit_3.1_-3.2_answers[1]


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Sec 1 g_-_unit_3.1_-3.2_answers[1]

  1. 1. UNIT 3:TROPICAL RAINFOREST • Did you know? We are losing Earth's greatest biological treasures just as we are beginning to appreciate their true value. Rainforests once covered 14% of the earth's land surface; now they cover a mere 6% and experts estimate that the last remaining rainforests could be consumed in less than 40 years.
  2. 2. WHAT ARE WE INVESTIGATING? TROPICAL RAINFOREST • What are Tropical Rainforest? • Where are they located?
  3. 3. YOU WILL LEARN TO • use photographs and sketches to describe the characteristics of Tropical rainforest • describe how Tropical rainforest adapt to the tropical climate • describe the uses and importance of Tropical rainforest respect different people’s perspectives about rainforest
  4. 4. CHARACTERISTICS OF TROPICAL RAINFOREST General Characterises Description -- thick and luxuriant evergreen forest Suitable Climate-- high rainfall and high temperature throughout the year Evergreen trees – do not shed all their leaves at the same time
  5. 5. CHARACTERISTICS OF TROPICAL RAINFOREST How can we study the rainforest? Diversity of plant species Structure of the forest Adaptation of plants
  6. 6. STRUCTURE OF RAINFOREST 80 Formed by the crown of the trees Emergent 50 30 Lianas and epiphytes grow in this layer Canopy 20 Undergrowth Layer Forest floor 0 Plants here are widely spaced Sparse vegetation with leaf litter
  7. 7. * tallest trees are the emergent * towering above the canopy * rising as much as 5080metres above the forest floor. * Eg Tualang and Kapok trees. Emergent layer * Trees grow to heights 20-30 metres to reach sunlight. * Form a continuous cover locking 90% of sunlight * Eg includes ferns Canopy Layer * It's very dark down here. Little sunshine reaches this area *larger leaves to reach the sunlight. *plants seldom grow to 20 metres. * hardly any sun reaches the forest floor things begin to decay quickly. Undergrowth Layer
  8. 8. HOMEWORK • Read Pages 75 to 76 from textbook • Do exercise 3.1 and 3.2 (pages 37-40) from your workbook. • (you may refer to slide 6 of your notes and pg. 79 of your textbook to help you draw the sketch of the rainforest)
  9. 9. DISCOVER THE DIFFERENT SPECIES FOUND IN THE TROPICAL RAINFOREST The world's largest honey bees home: _____________ Forms lush carpet of greenery: _______ Makes good household plants : _________ Used as medicinal or craft purposes: ____________ The giant of the Amazon Rainforest : ____________ Found on Singapore rain trees: ____________ Grows well with nutrients from decomposed : ____________
  10. 10. DISCOVER THE DIFFERENT SPECIES FOUND IN THE TROPICAL RAINFOREST The world's largest honey bees home: Tualang tree Forms lush carpet of greenery: mosses Makes good household plants : Staghorn ferns Used as medicinal or craft purposes: Monkey Ladder vines The giant of the Amazon Rainforest : Kapok tree Found on Singapore rain trees: Bird’s Nest Fern Grows well with nutrients from decomposed Fungi
  11. 11. Water catchment Green lungs of the earth Habitat to flora and fauna Uses of Tropical Rainforest Habitat to indigenous people Source of timber Medical application
  12. 12. • An area drained by a river and the smaller rivers that flow into it. • Rain water that drips from trees seeps into the ground and is stored as ground water so Tropical Rainforest are large water catchment areas. • Impurities are trapped by the soil before it flows onto the reservoirs . • The Central catchment reserve lies within the biggest water catchment in Singapore
  14. 14. GREEN LUNG OF THE EARTH • Forest absorb carbon dioxide from the atmosphere and release oxygen through photosynthesis. • Forest helps the earth to “breath” so its called “green lungs of the earth.” • 20% of earth oxygen is generated by the Amazon rainforest. • Forest acts as the earth’s natural purifier and the dense vegetation keeps it cool.
  15. 15. • Rainforest is home to 2 million of the world’s plants, animals, insects and a variety of fungi. • Ample sunlight allows plants to thrive which in becomes food to animals. • The canopy allows other plants and animals to survive. • Indigenous people obtain food through hunting or as shifting cultivators and depend on the rainforest for basic necessities too.
  16. 16. • Forest provide wood for fuel for cooking. • Tropical rainforest supply one-fifth of the world's industrial timber . • Teak, ebony, mahogany and meranti are valued for their strength, durability, texture and beauty. • Products made include doors, window frames and furniture
  17. 17. • Tropical Rainforest is the world’s largest pharmacy source of medicine • Brazil nuts have cancer-fighting prosperities • Cinchona tree – treats Malaria • Madagascar periwinkle plant– treats childhood leukaemia • Clavillia plants treats eczema & itchiness
  18. 18. WHICH PHOTOGRAPH SHOWS A TROPICAL RAINFOREST ? Figure B Figure A What factors did you consider to make your decision?
  19. 19. GEOGRAPHICAL INVESTIGATION SKILLS A SCHOOL-BASED ACTIVITY- SKETCHING • Observe how the trees in the school field adapt to our climate. • Take a photo of the tree that shows a characteristics of the adaptation. • Using the skills studied in Unit 2 and with reference to Pg. 79 of the textbook, sketch the feature you see. • Paste your sketch and the photo on a A4 paper and submit to your teacher