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(共17張PPT)
Unit 5 Revealing Nature
Using Language--Listening & Speaking
Learning Objectives
At the end of the class, you will be able to:
Learn different forms of life by listening and reading
Sort out words and expressions related to biodiversity and describe the species using the related words and expressions
Strengthen the awareness of protecting biodiversity and develop the interest in exploring nature
What is the theory of evolution
In his book On the Origin of Species, Darwin explained the theory of evolution: living things, including humans, had evolved from lower forms of life.
T play a video about poplar in China and ask students to takedown notes. T ask Ss to discuss in groups and draw a mind map to introduce diversiform-leaved poplar.
Every species is lovely and special!
Lead in: different life forms on earth
Listen to the podcast and answer the questions.
1.What is the oldest life forms on earth
2.What kind of the oldest life form is mentioned in the material
bacteria
Ⅰ.the oldest life forms
microorganism
What
Bateria:______________ microorganism
Where
in the _____, in ______, and even _____________.
Amount
An average human body contains around ______________ bacteria cells.
Role
1. Most bacteria in your body help with ________.
2. They help ________ that goes into your stomach, such as cheese, yoghurt and vinegar.
3. Bacreria are also helpful at the other end of the ______________________They have an important role dealing with _________ and that of ______________. Bacteria break down this waster and other dead, organic matter, like fallen leaves, into ______.
single-celled
inside your body
make the food
your waste
other organisms
nutrients
digestion
food production process
thirty-nine trillion
air
water
Listen and complete the fact sheet
Do you think bacteria are special Why
Complete the paragraphs.
is home to
are native to
scientific
habitats
ecosystem
appearance
primitive
ancestor
Word Bank
Galapagos island
加拉帕戈斯群島
Santa Cruz
圣克魯斯島
tortoise
陸龜
mangrove
紅樹
Isabela
伊莎貝拉島
Iguana
鬣蜥
San Cristobal
圣克里斯托瓦爾島
Ⅱ.life forms on Galapagos island
What species are there
What made them special
Summarize words and expressions to describe species.
Physical feature
Where
Role in ecosystem
be important to
serve as
help with
be useful at
have a special appearance with...
... metres in length
weigh over ...kilos
sp is home to
sth is native to
sp is renowned for
sth can be found in
What kind of species native to China do you know of
Ⅲ.life forms in China
Diversiform-leaved poplar
Draw a mind map to make introduction
1.What happened to the Pinta island tortoise Why
2.What lessons can you learn
Ⅳ.extinct life forms
1.What happened to the Pinta Island tortoise Why
2.What lessons can you learn
the Pinta Island tortoise
Read the passage in page 71 and answer the questions.
Prepare a speech to call on people to help maintain the biodiversity!
You should include the analysis of the current situation and measures to protect it.
group work
make efforts to build a community of all life on earth!
Homework
1.Polish your speech and deliver the speech to your classmates.
2.Find more species you are interested in and introduce them to your classmates.
Thinks for Listening!
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Thanks!

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