高中英语人教必修三unit4readinghowlifebeginontheearth.pptVIP

（ ） 1 Insects and amphibians appeared. （ ） 2 Dinosaurs appeared. （ ） 3 The earth became a solid ball. （ ） 4 Small plants grew on the water. （ ） 5 Reptiles appeared. （ ） 6 Plants began to grow on dry land. （ ） 7 The earth was a cloud of dust. （ ） 8 Water appeared on the earth. （ 9 Shellfish and other fish appeared. （ ）10 The universe began with a “Big Bang”. （ ）11 Clever animals with hands and feet appeared. （ ）12 Mammals appeared. 5 10 6） 2 9 4 8 3 7 1 Detailed reading Put the order of development of life into a time line. 12 11 Page 27 We have only one earth!!! Speaking Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. So how to solve the problem? * theory atom billion globe global violent carbon nitrogen n. 学说；理论 n. 原子 pron. n. adj. 英万亿； 美十亿 n. 球体；地球仪；地球 adj. 全球性的；全世界的 adj. 猛烈的；激烈的；强暴的 n. 碳 n. 氮 Words Review vapour atmosphere unlike fundamental presence dissolve harmful acid chain reaction n.（= vapor）蒸气；水蒸气 n. 大气层；气氛 prep. 不同；不像 adj. 基本的；基础的 n. 出席；到场；存在 vt. vi. 溶解；解散 adj. 有害的 n. 酸 n. 链子；连锁；锁链 n. 反应；回应 Words Review multiply oxygen shellfish amphibian reptile dinosaur exist mammal thus dioxide vi. vt. 乘；增加 n. 氧 n. 水生有壳动物 n. 两栖动物 n. 爬行动物；爬虫 n. 恐龙 vi. 存在；生存 n. 哺乳动物 adv. 因此；于是 n. 二氧化物 Words Review Astronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it. astronomer 天文学家 What is astronomy ？ The Solar system How many panets are in the solar system and what are they? 海王星 Neptune 水星 Mercury 金星 Venus 地球 Earth 火星 Mars 木星 Jupiter 土星 Saturn 天王星 Uranus HOW LIFE BEGAN ON THE EARTH Reading Each religion and culture has its own ideas about how life began on earth. What do you know? Pangu separates the sky from the earth Nvwa made humans. God created the world in seven days. the Big Bang Para.1 Para.2 Para.3 Para.4 Para.5 A theory about how the unive