文档介绍
How did the earth come into being? The Big Bang Violent earth Atmosphere A solid ball water Big Bang Big Bang A solid ball Atmosphere water Water Air Life Water is the headspring of life. Skimming How Life Began on the Earth Period 1 Join the main idea for each paragraph: Para.1 Para.2 Para.3 Para.4 Para.5 a)The arrival of humans and their impact on the earth b)The development of plants and animals on the earth c)A widely accepted theory about the formation of the universe d)The importance of water for life e)The formation of the earth Fill in the blanks with different kinds of living things. 1________________ 2____________________ 3________________ 4__________ 5__________ 6_________ 7__________ 8__________ 9__________ Small plants in water shellfish and all sorts of fish green plants on l