1、单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,The Water Planet,Unit 13,Warming-up,Do you know any of the four oceans?,the Pacific Ocean,the Atlantic Ocean,the Indian Ocean,the Arctic Ocean,Can you find the four oceans on the map?,世界地图,the Pacific Ocean,the Atlantic Ocean,the Arctic Ocean,the Indian Oc
2、ean,Do you know any of the seven continents?,Asia,Europe,the North America,the South America,Antarctica,Oceania,Can you find the seven continents on the map?,Africa,世界地图,Asia,Europe,the North,America,the South,America,Antarctica,Oceania,Africa,Experiments,Let,s do some experiments to know some of th
3、e properties of water.,Picture 1,Experiment 1 shows how air pressure causes a piece of cardboard to cling to an upturned glass of water.,Picture 2,Experiment 2 shows how substance with different density behave when placed in the same container.,Picture 3,Picture 4,Experiment 3 an e,xamp,le of how wa
4、ter dissolves substance and objects is,Experiment 4 illustrates some of the differences between salt water and fresh water.,.,Water can be used to make electricity.Water energy is lean and safe,but dams sometimes destroy the environment.This is a good way to use water because the water stays clean a
5、nd can be reused.Everyone can benefit from the water.,Electricity,Plants need water to grow.In dry areas,We have to bring extra water to grow plants and vegetables.Many people will benefit from the way of using water.We need water to grow crops,but a lot of water is wasted in the process.We must fin
6、d a better way to use water so that crops can grow and water can be saved.,Agriculture,In our homes,We use water to cook,clean,wash clothes,and wash ourselves.We often waste a a lot of water when we use it at home.Everyone use water at home,Of course,but water used at home only benefit one family or
7、 one person.,Home use,Most of us love water sports such as swimming,and playing on the beach.This is good way to use water,but must make sure that we dont pollute the water or throw trash on the beach.If we build too many hotels by the beach,or too many people visit the beach,it will disturb the sensitive wild life in our oceans,and rivers,Entertainment,Thank you,
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