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(共19张PPT)
Listening
Key question
主题范畴：人与自然
Unit 5 Water is life
What interesting facts do you know about water
Pre-listening
bath
salt
brain
drinkable
undrinkable
surface
drinking water
n. 洗澡；洗浴
adj. 含盐的；咸的
n. 脑
adj. 可饮用的
adj. 不可饮用的
n. 表面
饮用水
New words
1. Brainstorming
Before you listen
What interesting facts do you know about water
Two thirds of the Earth is covered by water.
Salt water is undrinkable.
...
2. Quiz about water
Before you listen
(1) After we do exercise, we need ____ water.
A. more B. less
(2) If the water smells strange, we ____ drink it.
A. should B. shouldn’t
(3) About ____ of the human body is water.
A. 30—40 B. 60—70
(4) Most of the water on Earth is ____ water.
A. fresh B. salt
(5) If we take a shower instead of a bath, we’ll use ____ water.
A. more B. less
Listening tips
1.Pre-listening prediction strategies.
听前预测策略。
2. Legitimate inference.
合理推断。
The water on Earth
Ways to save water
The water in the human body
Listening
3. Listen again and complete the notes below.
70
3
97
60
75
a few days
2 to 3
wash clothes and take baths
0.5
Good evening and welcome to this week’s episode of The Natural World. I’m Rebecca. Tonight we will be talking about water.
About 70% of the Earth’s surface is water. However, about 97% of the water on Earth is salt water. Salt water is not drinkable. Only about 3% of the water on our planet is fresh water, but most of it is ice. So, how much of the water can we use as drinking water Only about half a per cent! And in many places, clean and safe drinking water is not easy to find.
Tapescript
Why is water so important Well, most of the human body is water: around 60% in an average adult man. There is more water in some parts of the body. For example, about 75% of the brain is water. People can live for several weeks without food, but only for a few days without water. Human beings need around two to three litres of water per day. Athletes usually need more water. When it is hot outside, people need more water too. But people use a lot more water for other things, such as washing clothes and taking baths.
There are many ways to save water. Having a bath can waste a lot of water, so it’s better to have a quick shower. Also, remember to turn off the tap when you brush your teeth. That way, you can save over a hundred litres of water in a week!
Topics Key information
About 70% of the Earth’s surface is water. 1. —— salt water —— undrinkable
2. —— fresh water —— most of it is ice
3. —— drinking water
Why is water so important 1. of the body is water
2. of the brain is water
3. Humans need water for drinking
and other things
There are many ways to save water. 1. have a instead of a bath
2. when brushing teeth
→save litres of water in a week
97%
3%
0.5%
60%
75%
a lot of
quick shower
turn the tap off
over a hundred
Retell
More Exercise
About 70%.
For a few days.
I should turn off the tap.
Is water very important
What can we do to save water
drinking water
Salt water
It’s better to walk
There are
Taking / Having a bath
4 Discuss in pairs how we can use water wisely.
Post-listening
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