2022年高一英语《Unit4 Astronomy the science of the stars：Warming up and reading》教案

2022年高一英语Unit4 Astronomy the science of the stars：Warming up and reading教案 教学目标 1. Get the Ss to think about astronomy . 2. Get the Ss to learn about the origin of life on earth . 3. Ask the Ss to know how the universe developed and how life began on the earth .教学重难点：Learn how the universe developed and how life began on the earth .预习案：The origin of life on earth is a question that interests everyone. Each religion and culture has its own ideas about how life began on earth. What do you know ? In China, there are two legends about these puzzles. Do you know the names? In the western culture, who creates everything in the world?新授案1.Warming up :look at the picture 0n the page 25 and answer the question .What are the names of the eight planets that circle our sun?2.Reading Task one: Fill in the blanks after listening1).According to a widely accepted theory, the universe began with a _that threw matter in all directions.2)It was not immediately obvious that _was to be fundamental to the development of _.3)They are putting too much CO2 into the atmosphere, which prevent _ from escaping from the earth.Whats the writing style of the text?A. Narrative 记叙文 B. Explanation 说明文 C. Essay 散文Task two: Fast readingI. Read the passage quickly and match the main idea with each paragraph. Para. 1 The formation (形成) 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 earthTask three :Detailed reading This text can mainly divided into two stagesStage 1 : (para_) The development of the earthStage 2 : (para_)The development of lifeStage 1: (1) After the Big Bang, what was the earth like?(2) What happened next?(3) What did the water vapour and gases form?(4) What appeared as the earth cooled down?(5)Why is water so important for the beginning of life?Stage21.What life developed after water appeared?2.What life developed in water next?3.What about the life on land?4. What life developed next on land?5.What life developed after forests appeared?6.What life developed after dinosaurs?7. What life developed after mammals?Discuss:1.Who are the small clever animals with hands and feet?2. Are they taking care of the earth well? Why课堂练习：.Finish the Exercise 2（P27） on the book according to the questions above. Homework : SummaryAfter the “big bang”, the earth was still just a cloud of _,it _loudly with fire and rock, which were _ to produce the_, water vapour and other gases. Then _ began to appeared on the earth. _ in water are considered to be the earliest lives on the earth. The O2 they supplied encouraged the lives of_. Slowly green plants grew on land, which were followed by _like insects & _. When the plants grew into_, _ appeared. Then _ developed but disappeared later, which made the rise of a totally different animal,_, possible, and finally _ spread all over the world.