1、Unit 4solar system太太阳系阳系SunVenusMercuryMarsJupiterSaturnEarthPlutoNeptuneUranusBut scientists now think Pluto is too small to be called a planet.The names of eight planets.Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune1)水星水星2)金星金星3)地球地球4)火星火星5)木星木星6)土星土星7)天王星天王星8)海王星海王星Nuwa made humans.Pangu
2、 separates the sky from the earth.Other legends about the beginning of universe.ReadingHOW LIFE BEGAN ON THE EARTHSkimmingWhats the main idea of the passage?The text mainly tells us the_of the earth and the _ of life on it.formationdevelopmentConclude the main idea of each paragraph.1)A widely _ abo
3、ut the _ of the universe.2)The formation of the _.3)The _ of water for life.4)The development of _ and _ on the earth.5)The arrival of _ and their _ on the earth.theoryoriginearthimportanceplantsanimalshumansinfluence/effectScanning1.What is the original earths atmosphere made up of?2.What is the fu
4、ndamental to the development of life,and why?3.Which kind of life-being first appeared on the earth,plants or animals?Intensive readingRead the passage quickly to answer the following questions.Read the passage quickly to answer the following questions.carbon,nitrogen,water vapour,and other gases2.w
5、hat is fundamental to the development of life?Water.Because it allowed the earth to dissolve harmful gases and acids into the oceans and seas.1.What is the original earths atmosphere made up of?3.Which kind of life-being first appeared on the earth,plants or animals?Why?At first,small plants began t
6、o appear on the surface of the water,and they produce oxygen,which encouraged the later development of early shellfish and all sorts of fish.Can you fill in the blanks?23456789101 small plants in watershellfish and all sorts of fish insects reptilesamphibiansmammalsdinosaurs humansplantsanimalsGreen
7、 plants on landforestsLets review the evolution of life on the earth.1.Big Bang2.a cloud of dust3.A solid globe4.exploded with fire and rock5.produce the water vapour,carbon dioxide-atmosphereHow did the earth come into being?6.cooled down7.water appeared8.Dissolved harmful gases&acidWe are making t
8、he world better.We are making the world worse.ABDiscussion developed new methods of growing food(1)What humans developed?developed new methods of hunting developed new methods of moving around(2)But they are not taking care of the earth very well.What problem are humans causing?putting carbon dioxid
9、e into the atmospherethe earth may become too hotLets take part in the activities to save the earth!Use the following words or phrases to help you:prevent from harmful global warming carbon dioxide in turn depend on as a result atmosphere Homework Finish the exercises on page28 Write a short passage about how the earth came into being
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