小学英语清华版一年级起点《五年级下册lesson17》ppt课件

,water,Grade 5 Zhang Jun,green: plain（平原）,brown: mountain,white: polar regions （极地地区）,blue：water,salt water - fresh water -,oceans, seas,rivers, lakes,Fill in the blanks:,There is _ _ and _ _ on the Earth. Salt water is water from _ and _. Fresh water is water from _ and _. We can only use _ _, but there is not much _ _ on the Earth.,salt water,fresh water,oceans,seas,rivers,lakes,fresh water,fresh water,Read the words：,salt water fresh water the Earth sea ocean use need a lot of live river lake much important plant animals people sadly waste dirty throw trash save grow only make keepclean,Do you know:,Why is water important?,People and animals need water to live. 2) Plants need water to grow.,Question: What do people do to waste water? How do people make water dirty?,Question: What do people do to waste water?,People waste water when they keep water running.,Question: What do people do to waste water?,People waste water when they water plants.,Question: How do people make water dirty?,They make water dirty when they throw the trash into rivers and lakes.,People do,Tick or cross: Keep the water running when we wash our hands. ( ) Take a shower in 10 or 15 minutes. ( ) Water the flowers with clean water. ( ) We can throw the trash into oceans and seas. ( ),Lets save water! Lets keep water clean!,Homework: Read