1、UNIT 7 WHAT IS NATURE Lesson25 Teachers can encourage students to think by asking:We cant live without water.Can water change form?What can we use water to do?Where can we see water?lakestreamreservoir Can water change its form?改变形式Water freezes凝结，结冰Water turns into gas气体airfogsnowicewaterrainvapor水
2、蒸气three forms of waterWhat can we use water to do?to wash clothesto wash the dishesto take/have a shower淋浴To have a bath泡澡to make drinksto put out fires灭火to water vegetablesto make things in factoriesWhy should we save water?not leave the tap on while you wash/Use a basin面盆 not leave the tap on while younot water plants too muchFlush your toilet冲马桶 with used waterHomework:Read the dialogue and recite it.
