高二英語(yǔ)warmingup,speakingreading-免費(fèi)閱讀
【正文】 What’s this ? What color is it ? Why is it blue ? The water molecule is made up of two hydrogen atoms and one oxygen atom . Oxygen Atom Hydrogen Atom Hydrogen Atom What is water made up of ? Three forms solid liquid gas ( ice , iceberg , iceland ,etc. ) ( rivers , lakes , seas ,oceans underground ,etc.) (air) As we know , we keep in touch with water every day . If there were no water on the earth , what would happen ? no life life with water Water is a must for all the living things . What properties or characteristics do you know about water? colorless tasteless having no fixed shape three forms feeling wet keeping level absorbing heat The paper won’t fall off. Because the air pressure can hold the paper and the water won’t flow out. The water and the oil won’t mix. The oil floats on the water. It is because the densities of them are different. Water has larger density and mass. The chalk will dissolv
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