广东省惠州市惠东县惠东荣超中学高中英语 Unit4 Reading学案 新人教版必修3.doc

广东省惠州市惠东县惠东荣超中学高中英语 Unit 4 Reading学案 新人教版必修3‎ ‎【学习目标】‎ 1. 分享有关宇宙的构成、地球的形成、宇宙大爆炸、生物进化的资料；‎ 2. 了解边缘科学、地球生命的起源，了解万有引力、黑洞和太空旅行等天文知识，培养对科学的兴趣和探究科学的热情；‎ 3. 了解作者的写作特点，培养创造性思维。‎ ‎【方法指导】 ‎ ‎1.通读课文，理解文章大意 ‎ ‎2.再次细读课文，理解细节内容 课前预习: ‎ ‎①预读课文，找出难懂的句子，与同伴交流学习；‎ ‎②收集有关宇宙的构成、地球的形成、宇宙大爆炸、生物进化的资料。‎ 课堂探究案Exploring Case Step 1: Warming up & Pre-reading Discuss with the classmates in your groups about the following questions:‎ 1) Where do we come from? Who are our ancestors? ‎ 2) Each religion and culture has its own ideas about how life began on earth. What do you know?‎ 3) In our solar system eight planets circle around the sun. What are they? How to remember the order(顺序) of the eight planets(行星) ？ ‎ 4) What interests you in astronomy? Do you know any questions that astronomers are interested in?‎ A Quiz Game(知识小竞赛):‎ ‎1. How old is the earth?‎ A. About 3.5 billion years B. About 4.5 billion years C. About 5.5 billion years D. About 6.5 billion years ‎ ‎2. ______ of the earth surface is covered by water.‎ A. 20% B. 30% C. 50% D. 70%‎ ‎3. How many planets are there in the Solar System?‎ A. 6 B. ‎7 C. 8 D. 9 ‎ ‎4. What is the total population of humans on the earth?‎ A. About 3.5 billion B. About 4.5 billion C. About 5.5 billion D. About 6.5 billion ‎5. How long does the rotation of the earth take? ‎ A. 12 hours B. 24 hours C. a month D. 365 days ‎6. Which continent is the smallest?‎ A. Africa B. North America C. South America D. Oceania ‎ ‎7. On what day is the Earth day celebrated?‎ A. April 22 B. May ‎4 C. August 21 D. November 11‎ ‎8. Which ocean is the largest?‎ 5‎ A. The Pacific Ocean B. The Arctic Ocean ‎ C. The Indian Ocean D. The ‎Atlantic Ocean ‎9. Which country has the largest area?‎ A. Canada B. China C. Russia D. U.S.A ‎ Step 2: Prediction: ‎ ‎1. Look at the picture on P25. What can you see?_____________________________‎ ‎2. Now combine the title and the pictures, and then predict what the reading will be about? _______________________________________________________‎ Step 3: Fast reading Skim the passage and match the main idea with each paragraph. ‎ Para‎. 1 The formation of the earth.‎ Para‎. 2 The importance of water for life.‎ Para‎. ‎3 A widely accepted theory about the formation of the universe.‎ Para‎. 4 The arrival of humans and their impact on the earth. ‎ Para‎. 5 The development of plants and animals on the earth.‎ Scan the text and choose the best answer and choose the best answer.‎ ‎1. Why was the earth different from other planets?‎ A. It produced a lot of heat. B. The water remained. ‎ C. The water disappeared. D. It was the oldest planet.‎ ‎2. 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 not too hot and not too cold.‎ ‎3. Why was it necessary for plants to grow before animals?‎ A. Animals needed plants to protect them from the sun.‎ B. Plants provided oxygen for animals to breathe. ‎ C. Animals could hide from hunters in the forest.‎ D. It was easier for plants to grow.‎ ‎4. It can be inferred from the text that ___.‎ A. after “Big Bang”, what the dust was to become remained a mystery B. plants appeared before the animals C. plants multiplied and filled the oceans with oxygen D. plants played an important part in the appearance of the animals Step 4: Detailed reading:‎ ‎ Time ‎ What happened?‎ Big Bang ‎ ‎_________began to form and combine to create _______ and other bodies. ‎ ‎●Dust settled into a solid and ______ globe.‎ ‎●The earth __________ to produce its ___________.‎ 5‎ Between 4.5 and 3.8 billion years ago ‎ ‎●The continued ________ of _______ allowed the earth to dissolve harmful _________ and ________ into the oceans and seas. ‎ Many millions of years later ‎ ‎●The first small ________ on the surface of the water produced _______.‎ ‎●Early _______ and all sorts of fish appeared.‎ ‎●Green ________ began to grow on land. ‎ ‎●Insects and ___________ appeared.‎ Many millions of years later ‎ ‎●The first small ________ on the surface of the water produced _______.‎ ‎●Early _______ and all sorts of _________ appeared.‎ ‎●Green ________ began to grow on land. ‎ ‎●Insects and ___________ appeared.‎ ‎●________ appeared and they laid eggs.‎ ‎●__________ developed, laid eggs and _______ for more than ____ million years.‎ ‎●Mammals rose and ____________ babies. ‎ About 2.6 million years ago ‎●Some small ______ animals with hands and feet __________ and spread all over the earth. ‎ Now ‎ Humans produce too much carbon _______, making the earth too _____. ‎ Step 5: Retell the story based on the pictures.‎ Step 6: Summary of the text:‎ After the _________, the earth was a cloud of energetic ______. Later the dust began to _______ into a ______. And then it ________ loudly with fire and rock , which were in time to _________ the water vapour, carbon dioxide, which were to make the earth’s ____________. As the earth _______ down, small _______ began to _______ on its surface. Water had __________ from planets or satellites, but it _______on the earth. That made it possible for life to begin to ________ . ‎ The arrival of _______ encouraged the _______of early ________ and all sorts of fish. Many millions of years later, the first ______ _______ began to appear on _______. Later ____________ appeared. Some were________. Others called _________, were able to live on lands well as in the ______. When the plants grew into forests, _________appeared for the first time. After they disappeared, _________became more important. They were the last group of animals different from because they _________milk from within their bodies.‎ Step 7: Discuss with your classmates:‎ We have only one earth! It is high time that we took measures to save our earth!‎ But what can we do to protect our earth?___________________________________‎ 课后巩固：‎ 1. 根据下面短语提示，与同伴相互复述课文：‎ 5‎ The universe began with…, after which the earth…. It gradually changed into a… Then after the explosion, …was formed and later,… appeared, which made it possible… ‎ ‎…first appeared and encouraged…. Next, … began to grow, followed by… ‎ When…grew into…, … appeared.‎ After that, … developed and died out… Later, … came into being. Finally,…‎ appeared, spread all over the earth and became … on the planet. ‎ 1. 找出难懂的句子，与同伴交流学习。‎ 请做下面的课外阅读：‎ At firt, the earth’s surface layer（层）was made up of huge blocks of hard, solid rocks. Then slowly, there rocks broke up into smaller and smaller pieces. Finally stones, pebble（卵石）and grains of sand were formed. Many sorts of plants and animals lived and died on the surface of the earth. Their remains mixed up with the stones, pebbles and formed soil. The outmost layer of the earth is soil.‎ There are many ways in which large pieces of rock break into smaller ones. Wind, water, heat and cold help to break up rocks. When winds blow grains of sand against a large rock for a long time, the softer layers of the rock are slowly worn away. These leave holes and crack（裂缝）in the rock, which become bigger and finally the rock breaks up into smaller pieces.‎ The moving water of streams and rivers also help to break up rocks. As the water moves along, it carries with it small pieces of rock. These rub the larger ones. Thus, the larger rocks are worn down to smaller pieces.‎ The heat of the sun is also helpful to breaking up rocks. When the sun shines, the rocks become very hot. If these rocks are suddenly cooled, they may crack. Ice also plays a part in making soil. Water in the cracks can turn into ice in cold weather. As this happens, it becomes bigger and the cracks become wider, and finally break into smaller pieces.‎ ‎1. According to the passage, soil .‎ ‎ A. forms very slowly B. is a mixture of stones, pebbles and sand ‎ C. make up the layers of the earth D. is becoming smaller and smaller ‎2. How many factors are mentioned in helping the forming of soil?‎ ‎ A. Three. B. Four. C. Five. D. More than five.‎ ‎3. Which of the following speeds up the breaks of rocks most?‎ ‎ A. Hot weather. B. Cold water.‎ ‎ C. Sharp changes in temperature. D. More dead plants in the cracks.‎ ‎4. Which of the following is NOT true?‎ ‎ A. The remains of many plants of animals formed soil.‎ ‎ B. If a large rock never moves, it will never break up.‎ ‎ C. Even if a large rock never moves, it will break up.‎ ‎ D. Ice in the cracks helps to break up rocks ‎5. The best title for this passage should be .‎ ‎ A. Soil from Rocks B. Ways to Break up Rocks ‎ C. Soil on the Earth D. Soil, Outmost Layer of the Earth 5‎ Period 2 Warming up，pre-reading & reading 课堂探究案Exploring Case Step 1: Warming up & Pre-reading：A Quiz Game(知识小竞赛):‎ BDCDBDAAC Step 3: Fast reading Para‎. ‎1 A widely accepted theory about the formation of the universe. ‎ Para‎. 2 The formation of the earth.‎ Para‎. 3 The importance of water for life.‎ Para‎. 4 The development of plants and animals on the earth. ‎ Para‎. 5 The arrival of humans and their impact on the earth. ‎ Scan the text and choose the best answer and choose the best answer. ‎ 1. B 2. C 3. B 4. D ‎ Step 4: Detailed reading:‎ ‎ Time ‎ What happened?‎ Big Bang ‎ Atoms began to form and combine to create stars and other bodies. ‎ Between 4.5 and 3.8 billion years ago ‎ ‎●Dust settled into a solid and violent globe.‎ ‎●The earth exploded to produce its atmosphere.‎ ‎●The continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. ‎ Many millions of years later ‎ ‎●The first small plants on the surface of the water produced oxygen.‎ ‎●Early shellfish and all sorts of fish appeared.‎ ‎●Green plants began to grow on land. ‎ ‎●Insects and amphibians appeared.‎ ‎●Reptiles appeared and they laid eggs.‎ ‎●Dinosaurs developed, laid eggs and existed for more than 140 million years.‎ ‎●Mammals rose and gave birth to babies. ‎ About 2.6 million years ago ‎●Some small clever animals with hands and feet appeared and spread all over the earth. ‎ Now ‎ Humans produce too much carbon dioxide, making the earth too hot. ‎ ‎ ‎ Step 6: Summary of the text:‎ ‎“Big Bang”; energetic dust; combine; a ball;exploded; produce; atmosphere;cooled ‎; water;appear;disappeared;stayed;develop small plants;development; shellfish and all sorts of fish; the first green plants;on land;land animals;insects;amphibians;in the sea;dinosaurs; mammals;produced 阅读理解 答案： ACCBA 5‎