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. 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. Take 2 minutes, read the poem
Lets listen to a rainforest.
5. Earth’s oldest ecosystem.
High rainfall and high
temperatures throughout the
year.
Thick, luxuriant evergreen forests.
◦ Evergreen = no distinct shedding
season.
6. 1. Diversity of types
2. Structure of rainforest
3. Plant Adaptations
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,
cinnamon, corn, pandan, walnuts
8. Plants grown to different
heights
Three-layered structure
found in tropical
rainforests
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. 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. 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. 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
16. Plants adapt to the climatic
conditions with special
features.
Without adaptations, they will
not survive the high
temperatures and heavy
rainfall.
PG 78
17. 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.
18.
19. 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
21. Still air and lack of wind is
bad for seed dispersal.
Strong smelling flowers and
fruit encourage animal and
insect pollination.
22.
23. 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.
24.
25.
26. 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.
27. Complete the test in the time
allocated.
Remember to write in black ink.
If you are drawing diagrams, you
can use pencil.
Editor's Notes
Click on pic to launch clip with rainforest sounds…(58 mins)
http://www.youtube.com/watch?v=LTiRw7kx97E
