Unit 5 Revealing nature Understanding ideas课件（共32张，内嵌视频） 外研版(2019)选择性必修第一册

(共32张PPT)
Revealing nature
Starting out & Understanding ideas
Unit 5
Learning Objectives
01
Learning Objectives
Recognize and flexibly use the key vocabulary of this course period: distant, disgrace, evolve, suspect, evolution, generate, as well as the phrases: answer the call, be a disgrace, date back to, of all time, be fascinated by, be crowded with, come to exist, be similar to, adapt to, a variety of, according to, evolve into, be regarded as, etc.
Through reading the passage, help students perceive the hardships of Darwin’s journey in exploring science and pursuing truth, and learn from his spirit of not fearing difficulties, daring to question, and being brave in exploration.
Learning Objectives
Guide students to deepen their understanding of the passage in a step-by-step manner from shallow to deep through reading methods such as skimming and intensive reading, and help them master different reading skills and methods. By solving the designed questions, enable students to learn to extract important information based on key words, sort out the context clues of the passage, and develop the ability to conduct in-depth analysis of problems, process language information, and improve skills in summarization, generalization, and inferential judgment.
Key Points and Difficult Points
Key points:
Learn and master the key vocabulary of this course: distant, disgrace, evolve, suspect, evolution, generate, and the phrases: answer the call, be a disgrace, date back to, of all time, be fascinated by, be crowded with, come to exist, be similar to, adapt to, a variety of, according to, evolve into, be regarded as, etc., and be able to use them flexibly in specific contexts.
Key Points and Difficult Points
Difficult Points:
Learn to analyze and solve problems, sort out the structure of the passage, and improve reading proficiency by solving the questions designed in the reading section.
Through reading the passage, learn to be good at observing, thinking carefully, and stimulate interest in exploring nature.
Lead-in
02
Do you have a favorite animal or plant How much do you know about it
Look at the page from a science magazine and answer the questions.
1. What do you know about these animals What makes them special
They are all species that exist thousands of years on earth. They are old and rare (unusual).
2. What other similar animals do you know about Share your knowledge with the class.
Watch the video and answer the questions.
Look at the page from a science magazine and answer the questions.
1. How can seeds travel How can this benefit plants
Seeds usually are carried by the wind, water, and animals.
Plants can have a better chance at life.
2. Can you think of another example of seeds travelling Share it with the class.
Reading
03
Look at the evolutionary tree and answer the questions.
evolutionary
tree
frog
fish
zebra
crab
snail
jellyfish
starfish
human
Look at the evolutionary tree and answer the questions.
1. What species do you recognise in the picture
Paramecium, earthworm, snail, crab, fish, tortoise, bird, human, frog, alga, moss, fern...
2. What factors can cause the process of evolution
evolutionary
tree
Read the passage and talk about your understanding of the title.
Most commonly, people believe that a journey means a trip from one place to another, especially over a long distance and literarily a journey refers to the process by which something gradually changes and develops. The title may indicate that Darwin’s research work leading to his discovery of evolution and the origin of species took quite a long time and great efforts, determination and courage to achieve.
Choose the main idea of the passage and give your reasons.
Darwin’s interest in various living things made him a great naturalist.
Darwin’s journey on the Beagle inspired his Theory of Evolution.
Darwin went on a journey to confirm his theory that humans had evolved over time.
Match the parts with the main ideas.
A. The remark about On the Origin of Species.
B. Darwin's new theory about evolution.
C. The new discoveries during the journey.
D. Darwin answered the call and began his journey.
Part 1 (Paras. 1~2)
Part 2 (Paras. 3~5)
Part 3 (Para. 6)
Part 4 (Para. 7)
2. What did people think about the species at that time
A. All species evolved from the same species.
B. All species came into being in the meantime.
C. Some species appeared earlier than the others
D. Some species improved a lot since its appearance.
Read the passage quickly and choose the best answers.
1. Why didn’t the captain of the Beagle think Darwin was the best choice
A. Because Darwin wasn’t admitted to a university.
B. Because Darwin was dismissed from medical school.
C. Because Darwin brought shame to himself and his family.
D. Because Darwin had not enough interest in visiting distant countries.
Read the passage quickly and choose the best answers.
4. How did people feel Darwin’s theory
A. Astonished.
B. Excited.
C. Satisfied.
D. Interested.
3. What was Darwin’s new theory then
A. Environment played an important role.
B. Species evolved with the changing environment.
C. Different species lived in different environment.
D. The more complicated the species were, the more time it took.
Organise information from the passage and complete the diagram.
1. ON HIS JOURNEY
Darwin studied various living things in their natural environments and samples of the plants and animals he had collected.
He noticed that some species of animals were very similar to each other.
2. GENERATE IDEAS
Darwin asked the questions:
How did different species come to exist
Maybe animals evolved as they adapted to their changing environments
Organise information from the passage and complete the diagram.
3. LOOK FOR MORE EVIDENCE
On the Galápagos Islands:
He noticed that there was a difference between the finches on each of the islands.
It seemed the beaks had evolved according to what food was available on that particular island.
4. DEVELOP IDEAS
Darwin suspected that the finches had evolved from a common ancestor, which had arrived on the islands a long time before and it had slowly evolved into many new species.
Organise information from the passage and complete the diagram.
5. PROPOSE A THEORY
The Theory of Evolution: living things, including humans, had evolved from lower forms of life.
Now discuss why Darwin did not publish his Theory of Evolution until 1859, about twenty years after his discovery. Do further research if necessary.
Think & share
1. Why were many people “shocked” by Darwin’s theory
At that time, people believed that all species had appeared on Earth at the same time and had not changed since, but Darwin’s theory proposed that living things, including humans, had evolved from lower forms of life, which, as a result, shocked many people.
2. What kind of person was Darwin according to the passage
Darwin was a determined man. He had strong curiosity and interest in science and was good at thinking and making discoveries.
3. How do you think the human species will evolve in the future
4. What have you learnt about the spirit of scientific exploration How can this spirit help you in your life and studies
Vocabulary
1. distant
distant adj.遥远的
be distant from 离……很远；与……不同，与……关系不密切
in the distance 在远处(距离很远)
at/from a distance 从远处，离一段距离(不是很远)
keep one’s distance 保持距离
at a distance of 隔……远的距离
keep sb. at a distance 与某人保持距离
例题：These rare birds are easily scared, so visitors are required to keep ______ (they) distance from the observation area.
their
Vocabulary
2. suspect
suspect v.猜想，怀疑，觉得
suspicion n. 怀疑；嫌疑
suspicious adj. 怀疑的；可疑的；不信任的
suspect that... 怀疑……
suspect sb. to be... 怀疑某人是……
suspect sb. of (doing) sth. 怀疑某人(做)某事
be under suspicion 受到怀疑
on suspicion of 因涉嫌……
be/become suspicious about/of sb./sth 怀疑某人/某事
be suspicious of sb./sth. 不信任某人/某事
例题：The teacher suspected Tom ______ cheating in the exam when she saw him looking at his deskmate’s paper.
of
Exercise
04
Exercise: 语法填空
It was difficult to get to know her because she always kept everyone at a _________ (distant).
Many well-known _________ (geologist) have participated in the survey of this area.
The company has evolved over the years _________ a multi-million dollar organization.
The good thing about children is that they adapt very easily _________ new environments.
The topic was _________ difficult that we had to do a lot of research on it.
At work he was regarded _________ a miracle worker,the man who took risks and could not lose.
distance
geologists
into
to
so
as
Summary
05
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Starting out & Understanding ideas
Learning about basic information about rare animals
Reading
Vocabulary
the main idea and the structure of the passage
analyze Darwin’s discovery journey in chronological order
Homework
06
Review the language points and complete the exercises.
SEE YOU
NEXT CLASS!