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Sec 1 Unit 3
Lesson 1
Tropical Rainforest


At the end of the lesson you will be
able to :

1.Identify a tropical rainforest

2.List the characteristics of a
tropi...
 How

can we save tropical
rainforest?
◦ What are tropical rainforests?
◦ What is deforestation?
◦ Where are tropical rai...



Take 2 minutes, read the poem
Lets listen to a rainforest.
 Earth’s

oldest ecosystem.
 High rainfall and high
temperatures throughout the
year.
 Thick, luxuriant evergreen fores...
1. Diversity

of types
2. Structure of rainforest
3. Plant Adaptations
 Highest

plant diversity in all forest

types.
 Warm temperatures and constant
rainfall encourages plant growth.
 Over...
 Plants

grown to different
heights
 Three-layered structure
found in tropical
rainforests
 Trees

up to 50m talls.
 Clearly visible from above
 Trees that rise above the even
canopy below.
 Trees tend to have...
 Layer

of trees that grow to
between 20 – 30m
 The crowns form an
interlocking layer.
 Blocks 90% of sunlight from
the...
 Dark

most of the day as sun
rays are blocked by canopy.
 Plants tend to be small and
widely-spaced apart.
 Vegetation...
 Epiphytes

grow on trees to
receive more sunlight.
◦Ferns, orchids, mosses

 Lianas

are woody vines that
twine up tree...










50m
20m
Emergent layer
Canopy layer
Epiphytes
Lianas
Buttress Roots
Ferns
 Plants

adapt to the climatic
conditions with special
features.
 Without adaptations, they will
not survive the high
te...
 Tall

straight trunks
 Branches spread out near the
top to reach for sunlight.
 Smooth bark to allow
rainwater to flow...
 Broad

leaves to capture more
sunlight
 Waxy, leathery or hairy surfaces to
minimise water loss.
 Drip tips to allow w...
Waxy surface

Drip tip

Hairy surface
 Still

air and lack of wind is
bad for seed dispersal.
 Strong smelling flowers and
fruit encourage animal and
insect p...


Large spread roots that grow up to 5m
above the ground.
◦ Help to support the tall emergent and
canopy trees

Shallow r...
 By

the next lesson, pick a leaf
that you think is from a
rainforest tree and sketch it on
a piece of blank paper.
 Sub...
 Complete

the test in the time

allocated.
 Remember to write in black ink.
 If you are drawing diagrams, you
can use ...
Sec 1 geog unit 3 lesson 1
Sec 1 geog unit 3 lesson 1
Sec 1 geog unit 3 lesson 1
Sec 1 geog unit 3 lesson 1
Sec 1 geog unit 3 lesson 1
Sec 1 geog unit 3 lesson 1
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Sec 1 geog unit 3 lesson 1

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Unit 3 Part 1

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Sec 1 geog unit 3 lesson 1

  1. 1. Sec 1 Unit 3 Lesson 1 Tropical Rainforest
  2. 2.  At the end of the lesson you will be able to : 1.Identify a tropical rainforest 2.List the characteristics of a tropical rainforest 3.Label and describe the layers of a tropical rainforest.
  3. 3.  How can we save tropical rainforest? ◦ What are tropical rainforests? ◦ What is deforestation? ◦ Where are tropical rainforests found? ◦ Which areas have been deforested? ◦ Why do we deforest? ◦ How should we manage deforestation?
  4. 4.   Take 2 minutes, read the poem Lets listen to a rainforest.
  5. 5.  Earth’s oldest ecosystem.  High rainfall and high temperatures throughout the year.  Thick, luxuriant evergreen forests. ◦ Evergreen = no distinct shedding season.
  6. 6. 1. Diversity of types 2. Structure of rainforest 3. Plant Adaptations
  7. 7.  Highest plant diversity in all forest types.  Warm temperatures and constant rainfall encourages plant growth.  Over 300 species in 0.01sq km  Source of common local food ◦ Bananas, mangoes, pepper, cinnamo n, corn, pandan, walnuts
  8. 8.  Plants grown to different heights  Three-layered structure found in tropical rainforests
  9. 9.  Trees up to 50m talls.  Clearly visible from above  Trees that rise above the even canopy below.  Trees tend to have tall, straight and smooth trunks.  Tualang, Kapok tree.
  10. 10.  Layer of trees that grow to between 20 – 30m  The crowns form an interlocking layer.  Blocks 90% of sunlight from the forest floor.  Deflects most rainfall.
  11. 11.  Dark most of the day as sun rays are blocked by canopy.  Plants tend to be small and widely-spaced apart.  Vegetation is sparse on forest floor, mostly decomposing leaves.
  12. 12.  Epiphytes grow on trees to receive more sunlight. ◦Ferns, orchids, mosses  Lianas are woody vines that twine up trees for more sunlight. ◦Monkey ladder vine
  13. 13.         50m 20m Emergent layer Canopy layer Epiphytes Lianas Buttress Roots Ferns
  14. 14.  Plants adapt to the climatic conditions with special features.  Without adaptations, they will not survive the high temperatures and heavy rainfall. PG 78
  15. 15.  Tall straight trunks  Branches spread out near the top to reach for sunlight.  Smooth bark to allow rainwater to flow easily down to the roots.
  16. 16.  Broad leaves to capture more sunlight  Waxy, leathery or hairy surfaces to minimise water loss.  Drip tips to allow water to runoff. ◦ Reduces the growth of fungi and bacteria
  17. 17. Waxy surface Drip tip Hairy surface
  18. 18.  Still air and lack of wind is bad for seed dispersal.  Strong smelling flowers and fruit encourage animal and insect pollination.
  19. 19.  Large spread roots that grow up to 5m above the ground. ◦ Help to support the tall emergent and canopy trees Shallow roots that reach for the nutrients in the topsoil and decomposing foliage.  Constant presence of water, no need for deep roots that search for ground water. 
  20. 20.  By the next lesson, pick a leaf that you think is from a rainforest tree and sketch it on a piece of blank paper.  Submit both the leaf and the paper as your homework.
  21. 21.  Complete the test in the time allocated.  Remember to write in black ink.  If you are drawing diagrams, you can use pencil.

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