(共29张PPT)
Unit 4 Amazing Science
Topic 2 I’m excited about the things that will be discovered in the future.
Section C
对的英语工作室
YESENGLISH
LEARNING AIMS
1. Master the words about Mars
2. Learn about some basic information about Mars.
3. Talk about the future life on the Mars
Knowledge Competition
1. The atmosphere of the Mars is mainly made up of __________.
A. oxygen
B. carbon dioxide
C. argon
火星的大气主要是二氧化碳(95.3%)。
Knowledge Competition
2. The Mars is red because there is a lot of _________ on the surface of it.
A. gold
B. silver
C. ferric oxide
火星呈现出红色，主要是因为其表面有大量氧化铁。
Knowledge Competition
3. Mars has _______ natural satellites.
A. one
B. three
C. two
火星有两个天然卫星：火卫一和火卫二，可能是捕获的小行星。
Knowledge Competition
4. It was reported by NASA in 2007 that there was______ on Mars.
A. life
B. salt
C. water
2015年03月06日，科学家称火星表面曾非常湿润 ，含水量超过北冰洋。研究还发现火星地表直到大约12亿年前还存在着大量的水体。
Knowledge Competition
5. After 7 months' flight, the explorer _____ landed on the Mars successfully on Nov 27, 2018.
A. Opportunity（机遇号）
B. Spirit （勇气号）
C. InSight （洞察号）
NASA于2018年5月发射的无人探测器“洞察号”于11月27日凌晨成功抵达火星登陆点，并顺利传回首张照片。
What an amazing planet Mars is !
Let’s explore it together!
Where is Mars
It’s in the solar system.
Look and guess
_____ 1. Mars looks like a red ball.
_____ 2. The temperature on Mars is very high.
_____ 3. Mars is much larger than the earth.
_____ 4. Mars is too far away for us to reach.
T
F
F
F
Read and write
Diameter Color Shape
Climate Gravity Distance from the sun
53% as wide as that of the earth
red and orange
a ball
during spring and summer: strong storms temperature:
Between -138℃ and 28℃
about two-fifths as strong as it is on earth
about 228 million kilometers
Read and Answer
How Mars got its name
How far is Mars from the sun
Can you tell Which planet is Mars in the picture
How long does it take us to reach Mars
Read 1a and find out the key points.
Cao Chong weighed the elephant.
weigh [we ] (vt.) 重，有…重
How much did the elephant weigh
lose weight
put on weight
weight (n) 重量
Do you know why the ball falls to the ground
gravity [ɡrav ti] (n.) 引力， 重力
Newton discovered the gravity of the earth.
diameter [dai' mit ] (n.) 直径
diameter
15cm
What is the diameter of this circle
What is the diameter of the earth
地球直径大约是12756千米
Key Points
Mars is the fourth planet from the sun in our solar system and is named after
Mars, the Roman god of war.
以…命名
be named after
罗马战神
4th
Key Points
Mars goes around the sun at a distance of
about 228 million kilometers.
[ 'dist ns ] n. 距离 ，相隔
228
Key Points
倍数/分数/百分数 as+ adj./adv.+as
Its diameter is 53% as wide as
that of the earth.
直径
这个图书馆的书是那个图书馆的70%。
The books in this library are 70% as many as
those in that library.
这条河是那条河的1/3深。
This river is one third as deep as that one.
53%
Key Points
During spring and summer, the surface of Mars is covered by strong storms . The gravity on the surface of Mars is about two-fifths as strong as it is on earth.
引力，重力
风暴
暴（风）雨
2/5
Exercise
Mars, the _______ planet of the solar system, goes around the sun at a _________ of about 228 million kilometers. Its _______ is 53% as wide as that of the earth. It looks like a _____ and _______ball. It’s very beautiful. But during ________ and _______, strong __________can cover the whole__________of Mars. The gravity on the surface of it is about ________ as_________as it is on earth.
fourth
distance
red
orange
spring
summer
storms
surface
two-fifths
strong
diameter
Translate
太阳系
以…命名
罗马战神
相隔…
重力
重，有…重（v)
互相最靠近
直径
be closest to each other
The Roman god of war
weigh
at a distance of…
gravity
diameter
named after
solar system
Discuss
1. Does Mars have a good climate for plants
2. Is Mars a useful place to dry fruit
3. Is Mars a good place for human beings to live
4. Is Mars a comfortable place for heavy people
More challenges
1.How many planets are there in the solar system
2.When is the surface of Mars covered by strong storms
3.If you weigh 50 kilos on earth ,how much will you weigh on Mars
4.How far is it from the sun to Mars
5.What is the fifth planet in the solar system
6.这条铁路是以詹天佑命名的。
7.这条河流是那条河流的2倍长。
8.What’s the temperature on Mars
Summary
p
We learn:
1. Some words: storm, weigh，diameter, gravity
2. Some phrases: named after ,as…as, at a distance of
3. Some sentences:
(1) Its diameter is 53% as wide as that of the earth.
(2)The gravity on the surface of Mars is about two-fifths as strong as it is on earth.
We can : Talk about something more about Mars.
Complete the letter.
Hi Kangkang,
It has been two days_________( since ,from) we landed on Mars. It _________(cost, took) us more than two years to_________ (reach, get) here. Generally, the journey went well, but the living conditions were_______( quiet, quite) bad during the journey. We had to produce most of the food in the spaceship. ______________(What’s more, What’s worse), our water supplies were very low. We had to limit the use of water during _________(those, these) days. So we had a shower every six weeks. We will spend another seven hundred and sixty-three days on Mars. __________( How, What )a long time! I often miss the family, but the excitement of being on Mars is worth it!
Wish me luck!
Yours,
Uncle Stephen
since
took
get
quite
What’s worse
those
What
Homework
Write back an E-mail to Uncle Stephen.
Memorize the useful expressions and key sentences which we learned today.
Finish Section C in your workbook.
Review Sections A-C.
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Section C随堂练习
一、用方框中所给出的适当形式填空
storm, journey, weigh, general, excite
1. The news of launching Chang’e Ⅲ caused people’s great .
2. , the weather in Sichuan is neither too cold nor too hot in summer.
3. The end of everybody’s is the same, death.
4. The sky cleared up after the , and the sun was shining in the sky.
5. He himself on the scale, and it was 60 kg.
二、单项选择
1. It 3 days they arrived here.
A. has been; before B. was; since
C. has been; since D. is; ago
2. He was “Wu Shiliu”, in memory of his grandfather who was 56 years old when he was born.
A. name with B. named for
C. name of D. named after
3. Our hall is theirs but it wasn’t used completely.
A. as large as 3 times
B. as 3 times as
C. 3 times as large as
D. as 3 large times as
4. The girl standing 10 centimeters from the river bank is asking for help.
A. at distance of
B. at a distance for
C. at the distance for
D. at a distance of
5. It will them 3 days their destination.
A. spend; reaching B. spend; on
C. take; to reach D. take; get
三、阅读理解
Mission to Mars
On July 4, 1997, space exploration took a huge step. On that day, a spacecraft called Pathfinder landed on Mars. The National Aeronautics and Space Administration (NASA) sent Pathfinder to discover new information about the Red Planet.
The mission was a complete success. After landing, Pathfinder sent a small rover (漫游机器人), Sojourner, onto the planet's surface. Sojourner explored more than 250 square meters of Mars. Together, designed Sojourner to last for only seven days, but little vehicle ran twelve times longer! Pathfinder surprised scientists, too. It sent back information for almost three months. That was three times longer than it was built to last.
Because Pathfinder and Sojourner ran for so long, scientists got more information than they ever dreamed of getting. For one thing, they discovered that Mars is very sandy. Pictures of sand dunes around the land site hint that Mars once had water. Scientists know that water means life. Was there ever life on Mars We don't know yet. In addition, the Pathfinder mission told scientists that Mars is dusty. Huge "dust devils" on Mars spit enormous amounts of dust into the Martian air. Pathfinder also discovered frosty Martian temperatures at 200 degrees below zero Fahrenheit. At that temperature, a glass of water would freeze solid in just a few seconds.
In October, scientists lost Pathfinder's signal because the spacecraft's battery had run down. They tried to revive the signal but had no luck. The mission officially ended on November 4.
Scientists hope to use the knowledge from these missions to better understand how life on earth began. They will also use it to plan future Mars missions.
1．What did NASA do to get information about Mars
A．NASA sent the spacecraft Sojourner to Mars.
B．NASA sent engineers on a three-month space mission.
C．NASA sent the spacecraft Pathfinder to Mars.
D．NASA sent astronauts to run tests for seven days.
2．What was the main reason NASA considered the Pathfinder mission a success
A．Scientists found out that Mars is very cold and dusty.
B．Scientists got more information than they ever dreamed of getting.
C．Scientists learned that Mars definitely had water at one time.
D．Scientists found out that there was once life on Mars.
3．You can learn from this passage that ________
A．dust devils on Mars made the photographs hard to see.
B．Martian temperatures caused Pathfinder's battery to fail.
C．scientists suspect that life on Earth began on Mars.
D．scientists will look for signs that life existed on Mars.
.
答案
一、1. excitement 2. Generally 3. journey 4. storm 5. weighed
二、1. C It has been+一段时间+ since结构，since从句常用一般过去时。
2. D name after 以......命名。
3. C 倍数+as large as大几倍的表达法。
4. D at a distance of…在......远的距离。
5. C It takes sb. some time to do sth. 某人花......时间做某事。
三、句意：本文主要讲了美国宇航局的火星探测器，“探路者”号将一辆小型火星车“索杰纳”号送上火星表面。一直在探索火星，但是探测器被困在沙里，可能最终停止运行。美国国家航空航天局做了最后的努力去联系探测器。
1．A【解析】细节理解题。根据文中“The National Aeronautics and Space Administration (NASA) sent Pathfinder to discover new information about the Red Planet.” 美国国家航空航天局（NASA）派出“探路者”去发现有关这颗红色星球的新信息。可知，美国宇航局派遣太空飞船旅行者到Mars，故选A。
2．B【解析】细节理解题。根据文中“Because Pathfinder and Sojourner ran for so long, scientists got more information than they ever dreamed of getting.” 因为探路者和旅居者运行了这么长时间，科学家们得到了比他们梦想得到的更多的信息。可知，美国宇航局认为探路者任务成功的主要原因是：科学家们得到了比他们梦想得到的更多的信息。故选B。
3．D【解析】细节理解题。根据文中“Scientists hope to use the knowledge from these missions to better understand how life on earth began. They will also use it to plan future Mars missions.” 科学家们希望利用这些任务的知识来更好地了解地球上的生命是如何开始的。他们还将利用它来计划未来的火星任务。可知，从这篇文章中你可以看出科学家们将寻找火星上存在生命的迹象，故选D。
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Section C教学设计
一、教学内容
本课是九年级第四单元第二话题的第三课时。内容是1a，1b和1c。1a是一篇关于火星知识的说明文，旨在介绍火星的基本情况，唤起学生对自然科学的向往和热情，从而努力学习文化知识。1b的表格要学生在理解文章的基础上，用表格的形式复述课文。1c是讨论题，答案比较简单。本节阅读课，要教授学生生词短语，并学会猜测词义和语义，培养他们良好的阅读习惯，以及培养学生的阅读思维策略，提高阅读能力，拓展学生的文化视野。
二、设计理念
阅读作为学习的一个部分，既是外语学习的手段，又是外语学习的目的。阅读能力是一种综合的能力，它由理解程度和阅读速度组成，并受到语言因素和非语言因素的影响。把阅读策略的训练渗透到课堂教学中，能改变英语教学中一些耗时、费力、低效的尴尬和无奈，提高教学效果。本课的阅读策略从预测火星的4个特征开始，然后用文章中的众多数字为阅读线索，让学生了解火星的相关知识，通过火星的其他细节，如外形，色彩，气候等，让学生对课文内容有比较完整的认识，通过1a学习预测文章的内容，训练学生思维的敏捷性。在教学每一篇新课文时，可以引导学生根据课文的标题、体裁、开头或Pre-reading等推测文章的结构或主要内容。通过1b利用图表复述课文。最后对一些重要短语句型进行强化，让学生更好掌握如何阅读文章的技巧。
三、教学目标 1. Knowledge aims：
掌握本课的重点词汇和短语，了解火星的相关知识。 2. Skill aims:
能够通过所获取的文字信息，对火星有所了解，拓展自己的知识面。
3. Emotional aims: 激发学生探索宇宙的兴趣。
四、学情分析
学生已经学习了Section A 和Section B部分。在这两个Section 里总是提到Mars，学生已经对它产生了兴趣。“宇宙”属于“自然”的一部分。而“自然”正是课程标准要求的话题。1b属于理解型任务，学生如果能独立完成表格，也就说明他们已经掌握了1a的内容。1c看似让学生讨论，其实通过学习1a, 学生都能对所给的问题作出正确的判断。所以学生依照教学策略的引导，逐步从词到句，从点到面，完整地掌握本课所学。
五、重难点和关键
1. Key points:
Words and phrases: storm, weigh, be named after sb., as…as…, at a distance of …,
It takes…to do sth.
Sentences: Its diameter is 53% as wide as that of the earth.
You can tell which planet is Mars because it is bright, red in the night sky.
The gravity on the surface of Mars is about two-fifths as strong as it is on earth.
It takes a spaceship about eight months to reach Mars from the earth ….each other.
2. Difficult points：
Its diameter is 53% as wide as that of the earth.
3. Key points:
Let the students know how to write a passage like this, and master some reading skills.
六、教学课时
本教学内容共设1课时。
七、教学准备
教师收集有关太阳系主要行星的知识，相关的词汇，短语图片。学生课前预习课文，了解火星的相关知识。
八、教学过程
Stage 1 Class activity
A dialogue between the teacher and the students. Lead to learn the new words and phrases.
Stage 2 Pre-reading
Look at the picture ,let the Ss read the statements and encourage them to predict which is/are right.
【设计意图：对于有图片的文章，要培养学生利用常识结合图片内容对文章进行预测】
Stage 3 While-reading
Step 1 List the numbers that are in the passage, get the students to find the sentences about them. Then explain them, make sure the students can read the numbers correctly and master the useful expressions.
【设计意图：本文出现较多数字，一方面让学生复习各种数字的表达，另一方面，让学生掌握阅读说明文的技巧】
Step 2 Get the students to read the passage completely, then find more detailed information about Mars ,such as shape ,color…Work in pairs, Finish 1b.Then check the answers.
Stage 4 Post-reading
Step 1 Read the passage by themselves again ,fill in the blanks ,first check the answers with the partners ,then Ss give the right answers to the class..
【设计意图：依据原文，设计出一篇短文填空题，意在检测学生是否真正掌握了文章的主旨大意，同时再让学生熟悉一遍文章】
Step 2 A Memory Test
Step 3 More Challenges
【设计意图：step2和step3 旨在让学生有趣味地对课文词短语句子进回顾，既有趣味性又能巩固知识】
Stage 5 Summarizing and assigning homework Let the Ss go over the lesson and sum up the key points
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