UNIT 3 Period One（课件PPT)- 【状元桥·优质课堂】2024-2025学年新教材高中英语选择性必修第一册（北师大版2019）

CONSERVATION UNIT 3　 明确目标　构建单元体系 课文释疑　助力高效课堂 目 录 Contents 课时作业(十一) 阅读美文　激活思维潜能 课文研读　发展思维品质 阅读美文　激活思维潜能 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 明确目标　构建单元体系 返回目录 　 英语　选择性必修　第一册(BS) Period One　Topic Talk & Lesson 1—Comprehending 课文释疑　助力高效课堂 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 他们发现人类活动导致物种灭绝的速度 比正常情况快1 000倍。 显然，人类活动对地球上所有其他物 种，包括动物和植物都产生了负面影响。 返回目录 　 英语　选择性必修　第一册(BS) 没有森林，我们将没有空气呼吸；没有干净的水，我 们将无法生存。 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 课文研读　发展思维品质 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) extinctions reasons avoid 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 返回目录 　 英语　选择性必修　第一册(BS) 主句 定语 状语 物种灭绝，即某个物种的完全消失，在 地球的历史上并不罕见。 返回目录 　 英语　选择性必修　第一册(BS) 主句 定语 定语 主语 这其中包括称为“大灭绝”的第三次灭 绝，那期间90%至96%的物种灭亡了。 返回目录 　 英语　选择性必修　第一册(BS) 主句 让步状语 定语 虽然物种的自然灭绝并不罕见，但现在 灭绝的速度让人担忧。 返回目录 　 英语　选择性必修　第一册(BS) 课时作业(十一) 返回目录 　 英语　选择性必修　第一册(BS) 制 作 者：状元桥 适用对象：高中学生 制作软件：Powerpoint2010、 Photoshop cs3 运行环境：WindowsXP以上操作系统 Every year more people recognize that it is wrong to kill wildlife for “sport”. Progress in this direction① is slow because shooting is not a sport for watching, and only those few ❶who take part in it realize the cruelty and destruction. The number of gunners, however, grows rapidly. Wildlife is disappearing because of shooting and the loss of wild land habitat②. Habitat loss will continue with our increasing population, but can we slow the loss of wildlife ❷caused by shooting? There doesn't seem to be any chance ❸if the serious condition of our birds is not improved. Wildlife belongs to③ everyone and not to the gunners alone.Although most people do not shoot, they seem to forgive shooting for sport because they know little or nothing about it.The only answer, then, is to bring the truth about sports shooting to the great majority of people④. Now, ❹it is time to realize that animals have the same right to live as we do and that there is nothing fair or right about a person with a gun shooting the harmless and beautiful creatures. 【词块采撷】 ①progress in this direction 这方面的进展 ②wild land habitat 野生栖息地 ③belong to 属于 ④the great majority of people 绝大多数人 【亮句应用】 ❶who引导定语从句 (2023·新高考Ⅰ读后续写)I owe my success to my social teacher who is a beacon in my life on the road to writing. 我的成功归功于我的社会学老师，他是我写作道路上的灯塔。 ❷过去分词(短语)作后置定语 (2023·新高考Ⅱ)Not the pandas, even though the language used for the medical training instructions is actually English. 不是(和)大熊猫(对话)，尽管医学训练指导使用的语言实际上是英语。 ❸if引导条件状语从句 (2023·新高考Ⅱ读后续写)If you're willing to apply yourself, I think you have a good shot at this. 如果你愿意努力，我认为你在这方面会有良好表现。 ❹it is time to do是时候做…… (2023·北京建议信)It is time for us to take some measures to go public. 现在是我们采取一些措施宣传于众的时候了。 语言技能：①掌握单词的词性和词义，为准确记忆单词打下牢固基础；②掌握提出并接受建议的表达法，为写作储备素材；③掌握重点词汇和句式；④掌握限制性定语从句及非限制性定语从句的用法；⑤注重阅读能力的提升，包括长难句理解、细节的关注以及中心词的提炼。 素养提升：①了解野生动物存在的价值、生存现状及人类生存的环境；②增强对野生动物及人类环境的保护意识。 [教材原文] THE SIXTH EXTINCTION Extinctions, where entire species<1> are wiped<2> out, are not unusual<3> in our Earth's history.In fact, over 90 percent of all species that ever lived are now extinct.In the last 500 million years, there have been five times when life on Earth has almost ended.These include the third mass<4> extinction, known as the “Great Dying”, which killed 90% to 96% of all species.And the fifth event, which occurred 66 million years ago, caused the death of the dinosaurs.The reasons for extinctions are varied<5>. According to scientists, they include volcanic eruptions, asteroids<6> hitting the Earth from space, changes in sea levels, the decrease<7> of the oxygen content of the sea and global warming.Many scientists say we are now entering the Earth's sixth mass extinction.This time, human activity will be to blame<8>． Although it is not unusual for species to die out naturally, the rate at which this is now happening is cause for concern.A 2015 study by scientists who were based at Brown University and Duke University in the US, looked at how quickly species die out due to natural causes, that is, the “background extinction rate”.1.They found that human activity is causing species to die out 1,000 times faster than normal.There is a long list of reasons why so many species are dying out: air and water pollution, forests being destroyed, factory farming and overfishing.2.It is clear that human activity has negatively affected<9> all other species on Earth, including animals and plants. If a sixth mass extinction occurs, scientists who have studied the issue believe that up to three quarters of all species on Earth could die out.Of course, as we humans depend on so many species for our survival, we would also be at risk<10> of dying out.Our world and our lives depend on the balance in nature between animals and plants.3.Without forests, we would have no air to breathe, and without clean water we would be unable to survive. Can a sixth extinction be avoided？Experts say that it is not yet too late, if we take action now.This would mean we have to significantly change the way we live.For example, we need to take steps to save endangered<11> species, including setting up special areas where plants and animals can be protected. We need to change how we work and travel by using cleaner, more natural sources of energy, such as wind and solar<12> energy.We also need to improve our farming methods to reduce water, air and land pollution.In short, if we want to survive, we need to stop destroying the planet that we live on and start to protect it. The Black Robin Black robins are the birds that humans saved from extinction.In 1980, there were only five black robins left in the world.They all lived on a small island off the coast of New Zealand.Only one of those birds, a female called Old Blue, was able to lay eggs.Wildlife workers began a programme for raising black robin chicks.They protected Old Blue's eggs, helped them to hatch<13>, and took care of the chicks. Thanks to their efforts, there are now more than 250 black robins, and the population is spreading.To help them survive, people are restoring<14> their habitats and removing small animals that hunt them, such as mice and cats from the islands where they live. [词汇注解] <1>species/ˈspiːʃiːz/n.物种，种 <2>wipe/waɪp/vt.擦；拭 wipe out彻底毁灭 <3>unusual/ʌnˈjuːʒʊəl/adj.异常的；不平常的 <4>mass/mæs/adj.大量的 <5>varied/ˈveərid/adj.各种各样的，形形色色的 <6>asteroid/ˈæstərɔɪd/n.小行星 <7>decrease/dɪˈkriːs/vi. & vt.减少 n．减少；减少的量 <8>blame/bleɪm/vt.责怪，指责 be to blame把……归咎于 <9>affect/əˈfekt/vt.影响 <10>be at risk处境危险，受到威胁 <11>endangered/ɪnˈdeɪndʒəd/adj.濒危的 <12>solar/ˈsəʊlə/adj.太阳光(能)的 <13>hatch/hætʃ/vi. & vt.(使)孵化 <14>restore/rɪˈstɔː/vt.(使)恢复 第六次灭绝 物种灭绝，即某个物种的完全消失，在地球的历史上并不罕见。事实上，曾经存在的物种中90%以上现在都已经灭绝。在过去的五亿年中，地球上出现过五次生物几乎全部灭绝的情况。这其中包括称为“大灭绝”的第三次灭绝，那期间90%至96%的物种灭亡了。6600万年前发生的第五次灭绝导致了恐龙的灭亡。灭绝的原因多种多样。根据科学家的说法，这包括火山爆发、小行星从太空撞击地球、海平面的变化、海洋含氧量下降和全球变暖。许多科学家认为地球的第六次大灭绝即将来临，这一次，人类活动将是罪魁祸首。 虽然物种的自然灭绝并不罕见，但现在灭绝的速度让人担忧。2015年，美国布朗大学和杜克大学的科学家们进行了一项研究，研究了自然原因(即“背景灭绝率”)导致物种灭绝的速度。1.___________________________________ _____________________________________这么多物种正在消亡的原因有很多：空气和水污染、森林被毁、工厂化畜牧和过度捕捞。2._________________________________ _____________________________________________ 如果第六次大灭绝发生，研究这个问题的科学家们认为地球上多达四分之三的物种会灭绝。当然，由于我们人类依赖如此多的物种生存，我们也将面临灭绝的危险。我们的世界和我们的生命依赖于自然界中动植物间的平衡。3.________________________________________________________________________ 第六次灭绝可以避免吗？专家说，如果我们现在采取行动还为时不晚。这意味着我们必须极大地改变生活方式。例如，我们需要采取措施拯救濒临灭绝的物种，包括建立保护动植物的特殊区域。通过使用更清洁、更自然的能源来改变我们的工作和出行方式，例如风能和太阳能。我们还需要改进耕作方式，减少水、空气和土地污染。简而言之，如果我们想要生存，就需要停止破坏我们生活的星球并开始保护它。 黑知更鸟 黑知更鸟是人类从灭绝危机中拯救出来的鸟类。1980年，世界上只剩下五只黑知更鸟。它们栖息在新西兰海岸附近的一个小岛上，其中只有一只名叫“老蓝”的雌鸟能够产卵。野生动物工作者开始了一项黑知更鸟繁殖计划。他们保护老蓝的蛋，帮助孵化，并照顾幼鸟。由于他们的努力，现在黑知更鸟已超过250只，而且数量还在增加。为了它们的生存，人们正在恢复黑知更鸟的栖息地并把捕杀它们的小动物，例如老鼠和猫从它们居住的岛上移除。 Step One　Fast reading Ⅰ.Read the passage quickly and fill in the following blanks with suitable words. Ⅱ.What's the main idea of the passage? The main idea of the passage is the_______________ of species and the ___________ and how to _________ the sixth extinction. Step Two　Detailed reading Read the text(P52～53), then choose the best answer. 1．During the “Great Dying”, what is the percentage of all species on Earth that became extinct? A．Less than 90%. B．Nearly 50%. C．More than 90%. D．Nearly 80%. 答案 C 2．What do scientists think will cause the next mass extinction? A．Natural causes.　　 B．Global warming. C．Unknown reasons. D．Human activity. 答案 D 3．What can we know from Paragraph 2? A．Human activity has done harm to nature. B．It is unusual for species to die out naturally. C．Species die out quickly due to natural causes. D．There are few reasons why so many species are dying out. 答案 A 4．How can we avoid a sixth extinction? A．By changing the way we live. B．By changing how we work and travel. C．By improving our farming methods. D．All of the above. 答案 D Step Three　Post reading 1．How much do you know about extinction？Do you know which animals are dying out now? 2．As a student, what can we do to protect animals and plants? 答案 略 答案 略 Step Four　Sentence learning 1．Extinctions, where entire species are wiped out, are not unusual in our Earth's history. [句式分析]　本句是一个主从复合句。Extinctions are not unusual in our Earth's history是______；where entire species are wiped out是where引导的______从句，where在句中作______。 [自主翻译]　___________________________________ _________________________________ 2．These include the third mass extinction, known as the “Great Dying”, which killed 90% to 96% of all species. [句式分析]　本句是复合句。These include the third mass extinction是______；known as the “Great Dying”是过去分词短语作______；which killed 90% to 96% of all species是which引导的______从句，which在句中作______。 [自主翻译]　___________________________________ __________________________________________________ 3．Although it is not unusual for species to die out naturally, the rate at which this is now happening is cause for concern. [句式分析] 本句是复合句。the rate is cause for concern是______；Although it is not unusual for species to die out naturally是although引导的__________从句；at which this is now happening是“介词＋关系代词”引导的______从句。 [自主翻译]　___________________________________ ________________________________ $$