1. Book3 Unit4 Reading (1) How life began on the earth Zhao Lisheng No.2 Senior High School, Xingtai

2. The Earth is a member of the solar system. Eight planets circle around the sun, including the Earth. the sun Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune

3. Are we alone in the universe? Where is life from?

4. HOW life began on the earth? The origin of life on earth is a question that puzzles humans for a long time. Each religion and culture has its own ideas about how life began on earth. Pan GuNv Wa the God

5. What's the scientific idea about the origin of universe and life? Read the text and get the main idea with your group members. A widely accepted ______about the ______ of the universe. The formation( 形成 )of the _____. The importance of _____ for life. The development of ______ and ______ on the earth. The arrival of _______ and their _________ on the earth. Para.1 Para.2 Para.3 Para.4 Para.5 theory origin earth water plants animals humans influence (before life appeared) (different lives developed)

7. According to a widely accepted _______,after the “Big Bang”, _____ began to form and create stars. However, the earth was still just a cloud of _______, and it ________loudly with fire and rock, which were ________ to produce _________, water vapour and other gases. Then ________ began to appeared on the earth, which made it possible for _____ to develop. _____________ in water are considered to be the earliest lives on the earth. The oxygen they produced 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. theory atoms dust exploded in timecarbon water life The small plants shellfish and fish land animals amphibians forestsreptiles dinosaurs mammals humans

8. The Earth is beautiful!

9. However, we are not looking after the earth very well.

10. Would you like to share with us YOUR opinions about environment protection? prevent...from... persuade...not to... call on...to... punish those who kill... harmful gases take action solar energy limit the emission( 排放 ) of... stop cutting down forests save water eat less meat plant more trees stop using plastic bags recycle rubbish

11. Homework Read the text on Page 25&26. Write a short passage about environment protection and hand it in next Monday. Thank you for your coming! Goodbye!