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（顺序选修）英语6二年级《Theme A Enviromental Protection Environmental Protection Challenging Yourself Saving Our Earth ｜ Saving Water World Environment》优秀ppt课件
3
How much do you know about water?
By the time a person feels thirsty, his or her body has lost over 1% of its total water amount.
True!
About 90% of the huge amount water
on earth is sea water.
False!
97%
Nearly 60% of the earth’s surface is covered with water.
False!
75%
A healthy person can drink about three gallons (48 cups) of water per day.
True!
We should drink water only when we feel thirsty.
False!
We should drink water constantly even though we do not feel thirsty.
Water
sea/salt water
fresh water
97%
3%
Look at the following pictures and then write
a title for each of them on the given line.
drought ?[draut]
desertification ?