Saying you are concerned; making 、 accepting 、 and rejecting a suggestionFree talkGuess : Who am I
I am the most common liquid
People can’t live without me
Animals and plants also need me
I can change my form
waterA RiddleWater QuizTry this quiz:1
You could live without water for a few ____
weeksC
hours2
Your body need about _____ litres of water daily
eightC
When you exercise, the amount of water you need _____
increasesB
decreasesC
remains the same4
When you freeze water, it becomes a _____
liquidB
solidC
About _____ of Earth is covered by water
one thirdB
two thirdsC
one half6
The chemical symbol for water is _____
H2O2 C
HO212345Look at the picture and tell the class:Do you know the recycle of water
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