高中英语必修三第四单元PPT课件
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人教高中英语必修3Unit4Grammar (共33张PPT)
class is obvious.
Task 1
找出文中的主语从句.
What it was to become was uncertain until between 4.5 and 3.8 billion years ago.
What is even more important is that as the earth cooled down, water began to appear on its surface.
and object clauses.
As long as you love me
• Although loneliness has always been a friend of mine I'm leaving my life in your hands
People say ①I'm crazy and that I am blind
what 在从句中充当句子成分，如主语、宾语、 表语，而that 则不然。
1)_W__h_a_t you said yesterday is right.
2) Th_a_t__ she is still alive is a consolation.
找出主语从句。
• Who will go makes no difference. • Which is the best is not certain. • Why dinosaurs died out is still unknown. • When we will get together has not been
A. When will we B. When we will C. What will we D. What we will
Task 1
找出文中的主语从句.
What it was to become was uncertain until between 4.5 and 3.8 billion years ago.
What is even more important is that as the earth cooled down, water began to appear on its surface.
and object clauses.
As long as you love me
• Although loneliness has always been a friend of mine I'm leaving my life in your hands
People say ①I'm crazy and that I am blind
what 在从句中充当句子成分，如主语、宾语、 表语，而that 则不然。
1)_W__h_a_t you said yesterday is right.
2) Th_a_t__ she is still alive is a consolation.
找出主语从句。
• Who will go makes no difference. • Which is the best is not certain. • Why dinosaurs died out is still unknown. • When we will get together has not been
A. When will we B. When we will C. What will we D. What we will
人教高中英语必修3Unit4 ReadingPPT课堂课件(15页)
2)That is the day( which/that ) he will never forget. 3)That is the day which/that must be remembered.
Injuring all of a man's ten fingers is not as effective as chopping off one
人教高中英语必修3Unit4 ReadingPPT课堂课件(15页)（ -精精品品PP）T课 件
人教高中英语必修3Unit4 ReadingPPT课堂课件(15页)（ -精精品品PP）T课 件
3. 1)That is the day when/ on which he went to college.
一.
Revision of
学习
the attributive clause
目标
1.Teaching aim.
Review, strengthen and make use of the attributive clause.
(复习，巩固和应用定语从句。）
2.Teaching emphasis.
How to find antecedents and how to choose relatives.
1. 1) He is the professor who/that is named Tom.
2) He is the professor whose name is Tom.
3)He is the professor the name of whom is Tom.
4) He is the professor of whom the name is Tom. 2. 1) This is the novel which/ thatwas read by you.
高一英语必修三第四单元课件ppt
天王星是太阳系中离太阳第七远行星，颜色为灰 蓝色，是一颗巨型气体行星(Gas Giant)。以直径计 算，天王星是太阳系第三大行星；天王星的命名，是 取自希腊神话的天神乌拉诺斯——Uranus。乌拉诺斯 是古希腊神话中的宇宙之神，是最早的至高无上的神。 他是该亚的儿子兼配偶，是Cronus（农神土星）、独 眼巨人和泰坦（奥林匹斯山神的前辈）的父亲。
astronomy
physics mathematics medicine
biology chemistry
从使用情况来看，闭胸式的使用比较 广泛。 敞开式 盾构之 中有挤 压式盾 构、全 部敞开 式盾构 ，但在 近些年 的城市 地下工 程施工 中已很 少使用 ，在此 不再说 明。
geophysics
The theory about black holes （黑洞理论）
从使用情况来看，闭胸式的使用比较 广泛。 敞开式 盾构之 中有挤 压式盾 构、全 部敞开 式盾构 ，但在 近些年 的城市 地下工 程施工 中已很 少使用 ，在此 不再说 明。
Solar system
从使用情况来看，闭胸式的使用比较 广泛。 敞开式 盾构之 中有挤 压式盾 构、全 部敞开 式盾构 ，但在 近些年 的城市 地下工 程施工 中已很 少使用 ，在此 不再说 明。
geography biology history
从使用情况来看，闭胸式的使用比较 广泛。 敞开式 盾构之 中有挤 压式盾 构、全 部敞开 式盾构 ，但在 近些年 的城市 地下工 程施工 中已很 少使用 ，在此 不再说 明。
Science subjects
physics chemistry biology geology mathematics
Medicine Biochemistry Geophysics Astronomy
astronomy
physics mathematics medicine
biology chemistry
从使用情况来看，闭胸式的使用比较 广泛。 敞开式 盾构之 中有挤 压式盾 构、全 部敞开 式盾构 ，但在 近些年 的城市 地下工 程施工 中已很 少使用 ，在此 不再说 明。
geophysics
The theory about black holes （黑洞理论）
从使用情况来看，闭胸式的使用比较 广泛。 敞开式 盾构之 中有挤 压式盾 构、全 部敞开 式盾构 ，但在 近些年 的城市 地下工 程施工 中已很 少使用 ，在此 不再说 明。
Solar system
从使用情况来看，闭胸式的使用比较 广泛。 敞开式 盾构之 中有挤 压式盾 构、全 部敞开 式盾构 ，但在 近些年 的城市 地下工 程施工 中已很 少使用 ，在此 不再说 明。
geography biology history
从使用情况来看，闭胸式的使用比较 广泛。 敞开式 盾构之 中有挤 压式盾 构、全 部敞开 式盾构 ，但在 近些年 的城市 地下工 程施工 中已很 少使用 ，在此 不再说 明。
Science subjects
physics chemistry biology geology mathematics
Medicine Biochemistry Geophysics Astronomy
人教版高中英语必修三第四单元How Life Began On The Earth-课件 30页PPT文档
Discussion
As a student, what little things can we do for the earth?
Suggested Answers: control the population Plant more trees Stop littering Develop clean energy Go to work by bus rather than by
2. What made up(构成) the earth’s atmosphere after the earth exploded? Carbon dioxide, nitrogen, water vapour and other gases.
3. Why is water so important for the beginning of life? Because water allowed the earth to dissolve harmful gases and acids into oceans and seas.
• Good morning/afternoon, I am Dr…. I’m greatly honored to be here to give you a speech about the development of li
Summary
How life began on the earth “Big Bang”
Linkin Park — What I've done
What will happen when we put too much CO2 into the atmosphere? greenhouse effect global warming
As a student, what little things can we do for the earth?
Suggested Answers: control the population Plant more trees Stop littering Develop clean energy Go to work by bus rather than by
2. What made up(构成) the earth’s atmosphere after the earth exploded? Carbon dioxide, nitrogen, water vapour and other gases.
3. Why is water so important for the beginning of life? Because water allowed the earth to dissolve harmful gases and acids into oceans and seas.
• Good morning/afternoon, I am Dr…. I’m greatly honored to be here to give you a speech about the development of li
Summary
How life began on the earth “Big Bang”
Linkin Park — What I've done
What will happen when we put too much CO2 into the atmosphere? greenhouse effect global warming
人教版高中英语必修三Unit4课件.
Book 3 Unit 4 Important words and phrases
In my turn, I am going to have a class with you.
It's in my turn!
Whose turn?
Do you know the words?
different 变末尾t为 violent ce呢?
中文Βιβλιοθήκη 动词原形撒谎 vi. lie
躺、位 lie
于 vi.
放置、 lay
下蛋vt.
单三
lies lies lays
过去式
lied lay laid
过去分词
lied lain laid
现在分词
lying lying laying
1. Please __la_y__ the book on the desk. 2. He _l_a_y__ in bed all day yesterday, and that was
keep... doing 坚持；一直做某事
If he lies to people, his nose will grow longer. lie 说谎
He likes lying on the grass looking into the sky.
lie 躺
The hen lays an egg every day. lay 下蛋
2. We got to the cinema just in time for the beginning of the film.
3. You will succeed in time if you keep on. 4. Be on time. Don’t be late .
In my turn, I am going to have a class with you.
It's in my turn!
Whose turn?
Do you know the words?
different 变末尾t为 violent ce呢?
中文Βιβλιοθήκη 动词原形撒谎 vi. lie
躺、位 lie
于 vi.
放置、 lay
下蛋vt.
单三
lies lies lays
过去式
lied lay laid
过去分词
lied lain laid
现在分词
lying lying laying
1. Please __la_y__ the book on the desk. 2. He _l_a_y__ in bed all day yesterday, and that was
keep... doing 坚持；一直做某事
If he lies to people, his nose will grow longer. lie 说谎
He likes lying on the grass looking into the sky.
lie 躺
The hen lays an egg every day. lay 下蛋
2. We got to the cinema just in time for the beginning of the film.
3. You will succeed in time if you keep on. 4. Be on time. Don’t be late .
人教高中英语必修3Unit4reading(共26张PPT)
The change of gravity
on the moon
disappearing
gravity
in space
strong
on the earth
very light
The change of my weight
on the moon
heavy
weight
in space
no weight
Time order (structure) while after places
What should we write in detail? activities
feelings
Before going Time order While visiting
After visiting
where when who what
how
Retell
Last month I visited the moon with my friend. Before we left, I was told the force of g_g_r_a_v_ity would change three times on our journey. Then we took off. As we left the earth, I became very h_ea_v_y__. Gradually the weight le_s_s_e_n_e_d_. When I was in space, it d_d_is_a_p_p_e_a_r_e_d. We f__f_lo_a_t_e_d weightlessly in the cabin and I c_h_e_er_e_d_u_p_. When I was on the moon, I was surprised to find out even walking needs lots of practice n_n_o_w__th_at gravity changed. The returning of the earth was very fr_i_g_h_t_e_n_in_g_. We were amazed to watch fire b_re_a_k_ o_u_t__ on the outside of the ship.
人教高中英语必修3Unit4reading(共24张PPT)
appeared.
with a “Big Bang”.
1121. Clever animals with 1112. Mammals appeared.
hands and feet appeared.
Talk about the impacts men make to the earth. 1.Good ones 2.Bad ones 3.What we should do?
God created the world in seven days.
The Biblical Account
Day 1: God spoke and separated light from darkness creating Day and Night.
Day 2: God spoke and separated the water creating sky and ocean.
• Para. 4 d.The arrival of humans and their
impact on the earth.
• Para. 5 e.The development of plants and
animals on the earth.
Read the passage quickly and answer the questions.
3. What made up the earth’s atmosphere after the earth exploded? Carbon dioxide, nitrogen, water vapour and other gases.
4. How did water come into being on the earth? As the earth cooled down after it exploded, water came into being.
高中英语必修三第四单元 PPT课件 图文
Careful reading
Read the passage carefully and analyse its structure.
Para 1:Aewaridtehly, aatcmcepotsepdhthereoeraynabdowutattheer
formation of the universe. Para 2: The formation of the earth.
Let review the evolution of life on the earth.
After the “Big Bang”, the earth was full of water.
Original cells appeared in the ocean.
The cells in the water began to separate. Small plants came into being.
The earth is becoming hotter and hotter!
What can we do to take care of the
earth?
solar energy
purify air
plant trees
save water
recycle rubbish
prevent desertification
Discussion
We are making the world better.
We are making the world worse.
Because they are putting too much carbon dioxide into the atmosphere.
人教高中英语必修3Unit4ReadingPPT课堂课件(17页)新
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
3:50
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
Let's answer the question.
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
03
Post- reading
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
Read the passage quickly , match the paragraph numbers with the correct main ideas.
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
3:50
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
Let's answer the question.
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件 人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
03
Post- reading
人教高中英语必修3Unit4ReadingPPT 课堂课 件(17页 )新（ -精精品品P）PT 课件
Read the passage quickly , match the paragraph numbers with the correct main ideas.
人教版高中英语必修三《Unit 4 Astronomythe science of the stars》课件
Main idea of each paragraph
Para 1: Para 2: a. The importance of water for life b. The development of plants and animals on the earth c. The formation of the earth d. The arrival of humans and their impact on the earth e. A widely accepted theory about the formation of the universe
Unit 4 Astronomy: the science of the stars
Warming up
Let’s appreciate
some beautiful pictures and
videos of the solar system.
3
The Solar S• many comets (彗星) • other bodies
Nvwa makes human beings
In Bible, the world and the whole universe was created by the God. Then the god create the first man Adam and the first woman Eve.
Para 3: Para 4: Para 5:
While-reading
Work in pairs. Get familiar with the order of development of life according to the passage.
人教版高中英语必修三课件Unit4课件
新课标导学
英语
必修③ ·人教版
Unit 4
Astronomy：the science of the stars
1
学习目标展示
2
背景知识链接
学习目标展示
类别
课程标准要求掌握的项目
话题 Science of the stars；the development of life；space travel and gravity
背景知识链接
• Astronomy is the oldest science known to man.Thousands of years ago man looked at the stars and wondered about the heavens.But man was limited by the six planets that he could see with his eyes alone.The Greeks studied astronomy over 2,000 years ago.They could see the size， colour，and brightness of a star.They could see its place in the sky.They watched the stars move as the seasons changed.But the Greeks had no tools to help themselves
You must/mustn't...
类别
课程标准要求掌握的项目
主语从句(Noun clauses as the subject)
What it was to become was uncertain until between 4.5 and 3.8 billion years
英语
必修③ ·人教版
Unit 4
Astronomy：the science of the stars
1
学习目标展示
2
背景知识链接
学习目标展示
类别
课程标准要求掌握的项目
话题 Science of the stars；the development of life；space travel and gravity
背景知识链接
• Astronomy is the oldest science known to man.Thousands of years ago man looked at the stars and wondered about the heavens.But man was limited by the six planets that he could see with his eyes alone.The Greeks studied astronomy over 2,000 years ago.They could see the size， colour，and brightness of a star.They could see its place in the sky.They watched the stars move as the seasons changed.But the Greeks had no tools to help themselves
You must/mustn't...
类别
课程标准要求掌握的项目
主语从句(Noun clauses as the subject)
What it was to become was uncertain until between 4.5 and 3.8 billion years
新人教版高中英语必修三第四单元ppt课件
Part 2 (para2.3.4)
The development of living things.
Energetic dust
A solid ball Explode atmosphere water
Water made it possible _fo_r__li_f_e_t_o_b_e_g_i_n_t_o_d__ev_e_l_o_p_._
定义： 用作主语的从句叫主语从句，它是名
词性从句之一。引导主语从句的连接词有：
连词that, whether；连接代词who, what和which；连接副词when, where, how和why。
用法：
1) 由what等代词引起的主语从句： What the teacher said today was
Learning about language
Warming Up
Prepare for “DISCOVERING USEFUL WORDS AND
EXPRESSIONS”.
P. 28
Answer key for exercise 1:
-ence
un-
present presence violent violence confident confidence different difference patient patience
secret.
这里说的话都应当保密。
Whoever makes mistakes must correct them.
凡犯了错误的人都必须改正。
注意: 上述例句中的主语从句都是放在 句首, 但有时为了使句子结构平衡, 避免
“头重脚轻”, 常用 it 作形式主语, 而
把从句放在后面。 例如:
The development of living things.
Energetic dust
A solid ball Explode atmosphere water
Water made it possible _fo_r__li_f_e_t_o_b_e_g_i_n_t_o_d__ev_e_l_o_p_._
定义： 用作主语的从句叫主语从句，它是名
词性从句之一。引导主语从句的连接词有：
连词that, whether；连接代词who, what和which；连接副词when, where, how和why。
用法：
1) 由what等代词引起的主语从句： What the teacher said today was
Learning about language
Warming Up
Prepare for “DISCOVERING USEFUL WORDS AND
EXPRESSIONS”.
P. 28
Answer key for exercise 1:
-ence
un-
present presence violent violence confident confidence different difference patient patience
secret.
这里说的话都应当保密。
Whoever makes mistakes must correct them.
凡犯了错误的人都必须改正。
注意: 上述例句中的主语从句都是放在 句首, 但有时为了使句子结构平衡, 避免
“头重脚轻”, 常用 it 作形式主语, 而
把从句放在后面。 例如:
高中英语必修三第四单元精ppt课件
.
Fast reading
Read the passage quickly and find the main idea. A brief introduction on how the universe developed and how life began on the earth.
Careful reading
development of life? 3. How did water come into being on the earth? 4. Which kind of life-being first appeared on the earth,
plants or animals? Why? 5. Why were mammals different from all life forms in the
Unit 4
Astronomy: the science of the stars
.
How much do you know about the universe?
What are the names of the eight planets that circle our sun? What is their order from the sun?
Free Talk
1. How old is the universe? Several billion years ago.
2. How old is the earth? Between 4.5 and 3.8 billion years ago.
3. Which were the first creature or plants on earth?
Put the order of development of life.
Fast reading
Read the passage quickly and find the main idea. A brief introduction on how the universe developed and how life began on the earth.
Careful reading
development of life? 3. How did water come into being on the earth? 4. Which kind of life-being first appeared on the earth,
plants or animals? Why? 5. Why were mammals different from all life forms in the
Unit 4
Astronomy: the science of the stars
.
How much do you know about the universe?
What are the names of the eight planets that circle our sun? What is their order from the sun?
Free Talk
1. How old is the universe? Several billion years ago.
2. How old is the earth? Between 4.5 and 3.8 billion years ago.
3. Which were the first creature or plants on earth?
Put the order of development of life.
人教版必修三 Unit 4 Space Exploration Reading 课件(22张)
1977
_A__m_e_r_i_ca_’_s_N__A_S_A__s_p_a_c_e_a_g_e_n_c_y__launched _V_o_y_a_g_e_r_1__ to study _d_e_e_p__sp_a_c_e__.
Para. 3
Although scientists try to make sure nothing goes wrong, accidents can still happen.
Scientists’ enable us to understand how the
hope:
universe began
help us survive well into future
Your hope?
Post-reading
1. What does the title “Space: The final frontier” mean to you?
Paragraph 5: _T_h_e_f_u_tu_r_e__o_f _sp_a_c_e__e_x_p_lo_r_a_ti_o_n_l_o_o_k_s_bright, a_s_m__a_n_y_c_o_u_n_t_ri_e_s_a_r_e_p_l_a_n_n_in_g__fu_r_t_h_er_ m__is_s_i_o_n_s.________
Paragraph 3: _S_p_a_c_e_tr_a_v_e_l_h_a_s_a_l_w_a_y_s_i_n_v_o_lv_e_d__g_re_a_t_r_is_k_,_ b_u_t_d_e_s_p_i_te_t_h_e_r_i_sk_s__e_x_p_lo_r_a_ti_o_n_c_o_n_t_in_u_e_s_.__
“Challenger” ?
人教版高中英语必修3 Unit4 reading(共27张PPT)
than on the earth? A taller B no change C shorter
4.The force of gravity on the moon is
__A__of that on the earth.
A one-sixth B one-fifth C one-third
5. Who is china’s first astronaut in space, and his spaceship was named
We were too far from the earth now to feel its
pull, so we fell as if there is no gravity at all.
On the moon
3. It became very_l_ig_h_t_. _____
When we get closer to the moon, we shall feel its gravity pulling us, but it will not be as strong a pull as the earth’s
trying to escape the pull of earth’s gravity. It
was so hard that we could not say anything
to each other.
In space 2. The gravity_d_i_s_a_p_p_e_a_r_e_d_. __
2.If you are on the moon , your mass (体重)
will be __A__ on the earth.
A less than B heavier than C as heavy as
4.The force of gravity on the moon is
__A__of that on the earth.
A one-sixth B one-fifth C one-third
5. Who is china’s first astronaut in space, and his spaceship was named
We were too far from the earth now to feel its
pull, so we fell as if there is no gravity at all.
On the moon
3. It became very_l_ig_h_t_. _____
When we get closer to the moon, we shall feel its gravity pulling us, but it will not be as strong a pull as the earth’s
trying to escape the pull of earth’s gravity. It
was so hard that we could not say anything
to each other.
In space 2. The gravity_d_i_s_a_p_p_e_a_r_e_d_. __
2.If you are on the moon , your mass (体重)
will be __A__ on the earth.
A less than B heavier than C as heavy as
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the past?
1. What is the original earth’s atmosphere made up 2. of?
Carbon, nitrogen, water vapour, and other gases.
2. Why did scientist believe water is fundamental to the development of life? Because water allowed the earth to dissolve harmful gases and acids into the oceans and seas to ensure a following chain reaction, which made it possible for life to develop.
Very small air-breathing creatures. 4. Do you know what the order for the development of plants and animals is?
Ideas about how life began
reading
How Life Began on the Earth
5. Why were mammals different from all life forms in the past?
They were different because they produced their young from within their bodies and produce milk to feed them.
THE SOLAR SYSTEM
地球 _E_a_r_t_h_ 木星 _J_u_p_i_te_r 火星 _M__a_r_s_ 水星 _M_e_r_c_u_r_y_
海王星 _N__ep__tu_n_e 土星 __S_a_t_u_r_n_ 天王星 _U__ra_n__u_s 金星 __V_e_n_u_s__
Free Talk
1. How old is the universe? Several billion years ago.
2. How old is the earth? Between 4.5 and 3.8 billion years ago.
3. Which were the first creature or plants on earth?
Read the passage carefully and analyse its structure.
Para 1:Aewaridtehly, aatcmcepotsepdhthereoeraynabdowutattheer
formation of the universe. Para 2:The formation of thRead the passage quickly and find the main idea.
A brief introduction on how the universe developed and how life began on the earth.
Careful reading
Unit 4
Astronomy: the science of the stars
How much do you know about the universe?
What are the names of the eight planets that circle our sun? What is their order from the sun?
development of life? 3. How did water come into being on the earth? 4. Which kind of life-being first appeared on the earth,
plants or animals? Why? 5. Why were mammals different from all life forms in
Para 3:Thleifiempdoertvaencloe opfmwaetnertfor life.
Para 4:The development of plants and animals on the earth.
Para 5: Thhuemararnivabl eoifnhgusmans and their impact
on the earth.
Answer the following questions.
1. What is the original earth’s atmosphere made up of? 2. Why did scientists believe water is fundamental to the
Put the order of development of life.
3. How did water come into being on the earth?
The explosion of the earth produced water vapor, which turned into water when the earth cooled down.
4. Which kind of life-being first appeared on the earth, plants or animals? Why? At first, small plants began to appear on the surface of the water, they produce oxygen, which encouraged the later development of early shellfish and all sorts of fish.
1. What is the original earth’s atmosphere made up 2. of?
Carbon, nitrogen, water vapour, and other gases.
2. Why did scientist believe water is fundamental to the development of life? Because water allowed the earth to dissolve harmful gases and acids into the oceans and seas to ensure a following chain reaction, which made it possible for life to develop.
Very small air-breathing creatures. 4. Do you know what the order for the development of plants and animals is?
Ideas about how life began
reading
How Life Began on the Earth
5. Why were mammals different from all life forms in the past?
They were different because they produced their young from within their bodies and produce milk to feed them.
THE SOLAR SYSTEM
地球 _E_a_r_t_h_ 木星 _J_u_p_i_te_r 火星 _M__a_r_s_ 水星 _M_e_r_c_u_r_y_
海王星 _N__ep__tu_n_e 土星 __S_a_t_u_r_n_ 天王星 _U__ra_n__u_s 金星 __V_e_n_u_s__
Free Talk
1. How old is the universe? Several billion years ago.
2. How old is the earth? Between 4.5 and 3.8 billion years ago.
3. Which were the first creature or plants on earth?
Read the passage carefully and analyse its structure.
Para 1:Aewaridtehly, aatcmcepotsepdhthereoeraynabdowutattheer
formation of the universe. Para 2:The formation of thRead the passage quickly and find the main idea.
A brief introduction on how the universe developed and how life began on the earth.
Careful reading
Unit 4
Astronomy: the science of the stars
How much do you know about the universe?
What are the names of the eight planets that circle our sun? What is their order from the sun?
development of life? 3. How did water come into being on the earth? 4. Which kind of life-being first appeared on the earth,
plants or animals? Why? 5. Why were mammals different from all life forms in
Para 3:Thleifiempdoertvaencloe opfmwaetnertfor life.
Para 4:The development of plants and animals on the earth.
Para 5: Thhuemararnivabl eoifnhgusmans and their impact
on the earth.
Answer the following questions.
1. What is the original earth’s atmosphere made up of? 2. Why did scientists believe water is fundamental to the
Put the order of development of life.
3. How did water come into being on the earth?
The explosion of the earth produced water vapor, which turned into water when the earth cooled down.
4. Which kind of life-being first appeared on the earth, plants or animals? Why? At first, small plants began to appear on the surface of the water, they produce oxygen, which encouraged the later development of early shellfish and all sorts of fish.