高中英语人教版备课资料包：必修3 Unit 4教案 Teaching Resources .docVIP

Unit 4 Astronomy: the science of the stars Part 2: Teaching Resources (第二部分：教学资源) A text structure analysis of HOW LIFE BEGAN ON THE EARTH 1. Type of writing and summary of the text Type of writing This is a descriptive writing. Main idea of the passage The earth came into being after the “Big Bang”. Then small plants came growing in the water, followed by green plants appearing on land. In the end appeared small clever animals. Topic sentence of 1st paragraph After the “Big Bang”, the earth was just a cloud of energetic dust. Topic sentence of 2nd paragraph The earth was different because of the arrival of small plants growing in the water. Topic sentence of 3rd paragraph Many millions of years later the first green plants began to appear on land. Topic sentence of 4th paragraph Small clever animals appeared and spread all over the earth. 2. A tree diagram Section 2: Background information for Unit 4 Astronomy: the science of the stars 1. THE PLANETS 行星 Although we live in a very small piece of the Universe, its still where we call home and its a very interesting place. The nine planets that make up our solar system range from very tiny rocky planets to huge gas giants featuring fascinating ring systems. Mercury 水星 Mercury is the closest planet to the Sun. Its surface has many thousands of impact craters as a result of being bombarded by objects since the solar systems early days. Since Mercury has no protective atmosphere, the temperature on the surface ranges from extremely hot on the side facing the Sun to extremely cold on the side that faces away from the Sun. Venus 金星（太白星） Venus is named after the Roman goddess of love and beauty. This is one of those cases where beauty is only skin deep, though, as the surface of Venus is a very unpleasant place featuring very high temperatures, winds that blow hundreds of miles per hour and an atmosphere of sulfuric acid. Venus is an example of runaway greenhouse effect on a planetary scale. Earth 地球 People a