教学设计
1. Warming up
Ask students to think about a question: Where did I come from? Collect some interesting answers that they got from their parents when they were little kids.
2. Pre-reading
As curious about the origin of human beings as we are, our ancestors from different cultures and religions came up with different ideas on how life began on the earth. Show students the stories in Chinese mythology and the Bible, both of which are religious ideas on the origin of life. Ask students to read the first paragraph quickly and find out the scientific explanation.
3. Fast reading
Ask students to read the passage for 4 minutes and match the main ideas with each paragraph. A tip (Read the first and the last sentence of each paragraph) is provided to students to help them finish the task more accurately and quickly.
Para. 1
Para. 2
Para. 3
Para. 4
Para. 5
A. The formation of the earth
B. The arrival of humans and their effects on the earth
C. The importance of water for life
D. The development of plants and animals
E. A theory about how the universe was formed
4. Careful reading
(1) Students read stage one (Paragraph 1-3) to understand better the development of the earth, and finish the task below.
(2) Students continue to read stage two (Paragraph 4-5) to get to know the development of life, and fill in the flow chart.
There are several new words in it and a tip (Guess the meaning of new words through context) is offered to help students to guess the meaning of new words.
5. Quiz
After reading the passage, a group competition is held to check whether students have had a thorough understanding of the passage. The group which performs best in this part is rewarded with less homework. Questions are varied, such as Is it right to show films with dinosaurs and people together? Why? and It was necessary for plants to grow before animals because plants provided for animals to breathe.
6. Discussion
In the last part, we know that human beings are not taking good care of the earth and have caused great damage to it. Students will have a discussion about measures to protect the earth. They can make a dialogue with their partner about it. A possible version and some useful expressions are provided.
(Two students ran into each other the other day.)
S1: Oh! XX, I almost didn’t recognize you because of the heavy haze.
S2: Yeah, air pollution is getting more and more serious these days.
S1: I couldn’t agree more. People are doing so much harm to the earth. So what do you think we can do to protect the earth?
S2: Well, in my opinion, first,
Second,
Besides,
S1: Yes, I believe that will help. What’s more,
Last but not least,
S2: I hope that we can see blue sky more often in the near future and that... Listen! There goes the school bell and I see Miss Xiao coming. Let's go to class immediately!
S1: Ok. Hurry!
7. Homework
Students are required to prepare a class report about global warming, including the damage and solutions of it.
课件36张PPT。How Life Began on the Earth人教版高一英语 必修三
How Life Began on the EarthWhere did I come from?Warming up
Each culture has its own ideas about how life began on the earth.
What do you know about them?
V.S.ChinaWestern countriesPre-reading _______separated the sky from the earth.Pan Gu sunChinese Mythologymoonwinds4 directions;
mountainsBible – created the world and all living things Godreligious or scientificreligiousscientificThe universe began with .the Big BangHow Life Began on the EarthMatch the main ideas
Para. 1
Para. 2
Para. 3
Para. 4
Para. 5E. A theory about how the universe was formedA. The formation of the earthC. The importance of water for lifeD. The development of plants and animalsB. The arrival of humans and their effects on the earthA tip for you: Read the first & the last sentence of each para. The Development of
the earth The Development of
lifeFast readingSeveral billion years
after the “Big Bang”Between 4.5 and 3.8 billion years agoA cloud of A solid Exploded with began
to appearProduced , ,
Careful readingStage one (Para.1-3): Development of the earthSeveral billion years after the Big Bang A cloud of a solidsettled intodustglobeThe globe exploded
with
produced in timefire and rockcarbon dioxidenitrogen, water vapor, etc. appeared on its surface, which was fundamental to the development of life. After the earth cooled downWaterWhy was water fundamental to the development of life
according to many scientists?Because water allowed
the earth to dissolve
harmful gases and acids
into the oceans and seas.Careful readingStage two (Para.4-5): Development of life 2. and
all sorts of fish1. small plants in water3. green plants on land
4. insects (on land)
5.
(on land and in water)
6. forests 7. (on land)
8. dinosaurs (on land)
9. (on land)The process of evolutionFirst small plants
appeared in water Millions of years after water appearedlater and
all sorts of fishShellfishNext, green plants began
to grow on land insects followed
byamphibiansTip: Guess the meaning of new words through context两栖动物amphibiansThey were followed in time by land animals. Some were insects. Others, called amphibians, were able to live on land as well as in the water.on landin the waterLater, plants grew into forests appeared reptiles After reptiles appeared, dinosaurs developedThe rise of on the earthmammals哺乳动物Tip: Guess the meaning of new words through contextmammalsThis disappearance made possible the rise of mammals on the earth. These animals were different from all life forms in the past, because they gave birth to young baby animals and produced milk to feed them.gave birth toproduced milkFinally, appeared and spread all over the earth.some small clever animals Quiz time!Less Homework!Why was life able to develop on the earth but not on other planets? The earth had a solid shape.
The earth did not have harmful gases in
its atmosphere.
C. The water stayed on the earth but not on
other planets.
D. The earth was neither too hot nor too cold.Is it right to show films with dinosaurs and people together? Why? True (T) or False (F)
Why dinosaurs suddenly disappeared
a mystery.
F
still remains is no longer It was necessary for plants to
grow before animals because plants
provided for animals to breathe.
oxygen 1. Who are the small clever animals
with hands and feet?
2. Are they taking good care of the
earth? Why?Human beingsNo!Because they are putting too much into the atmosphere, which prevents from escaping into space.Result: The earth may become too to live on.carbon dioxideheathot
How to protect
the earth and
make it a better
place to live on?
DiscussionMake a dialogue: how to protect the earth (a possible version) Two students ran into each other the other day.
S1: Oh! XX, I almost didn’t recognize you
because of the heavy haze.
S2: Yeah, air pollution is getting more and
more serious these days.
S1: I couldn’t agree more. People are doing
so much harm to the earth. So what do
you think we can do to protect the earth?
S2: Well, in my opinion, first, … Second, …
Besides, …
S1: Yes, I believe that will help. What’s more,
… Last but not least, …
S2: I hope that we can see blue sky more often in the near future and that... Listen! There goes the school bell and I see Miss Xiao coming. Let's go to class immediately!
S1: Ok. Hurry!
Useful expressions:
poisonous gases;
public transport;
private cars;
energy-efficient 节能的
low-carbon life style 低碳的
resource ; solar energy;
pollution; protect; prevent;
save energy; plastic bags;
recycle 回收利用
Only if we care will we help,
only if we help shall all be saved!Homework Prepare a class report about global warming. (damage; solutions)评测练习
1. Match the main idea
Tip: Read the first & the last sentence of each paragraph.
Para. 1
Para. 2
Para. 3
Para. 4
Para. 5
A. The formation of the earth
B. The arrival of humans and their effects on the earth
C. The importance of water for life
D. The development of plants and animals
E. A theory about how the universe was formed
2. Stage one (Para.1-3): Development of the earth
3. Stage two (Para. 4-5): Development of life
Tip: Guess the meaning of new words through context
4. Quiz
(1) Why was life able to develop on the earth but not on other planets?
A. The earth had a solid shape.
B. The earth did not have harmful gases in its atmosphere.
C. The water stayed on the earth but not on other planets.
D. The earth was neither too hot nor too cold.
(2) Is it right to show films with dinosaurs and people together? Why?
(3) Why dinosaurs suddenly disappeared is no longer a mystery. (T or F)
(4) It was necessary for plants to grow before animals because plants provided for animals to breathe.
(5) Who are the small clever animals with hands and feet?
Are they taking good care of the earth? Why?
5. Make a dialogue with your partner about how to protect the earth.
(a possible version) Two students ran into each other the other day.
S1: Oh! XX, I almost didn’t recognize you because of the heavy haze.
S2: Yeah, air pollution is getting more and more serious these days.
S1: I couldn’t agree more. People are doing so much harm to the earth. So what do you think we can do to protect the earth?
S2: Well, in my opinion, first,
Second,
Besides,
S1: Yes, I believe that will help. What’s more,
Last but not least,
S2: I hope that we can see blue sky more often in the near future and that... Listen! There goes the school bell and I see Miss Xiao coming. Let's go to class immediately!
S1: Ok. Hurry!
