Unit 13 The water planet教學設計

          unit 13 the water planet
teaching goals:
1. talk about water and the ocean
2. practice making suggestions and expressing opinions
3. review modal verbs
4. write an explanation paragraph
teaching plan: (six periods)
1st period: warming-up and speaking
2nd period: listening
3rd period: reading
4th period: integrating skills
5th period: grammar
6th period: exercises
period 1 warming up & speaking
teaching aims and demands:
1. to get the ss to understand the main properties of water by connecting them with some common phenomena and learning to explain the phenomena.
2. to enable them to be aware of the importance of water, making good use of water in a proper way and protecting water resources.
teaching difficult point:
talk about how to use water and protect it.
teaching aids:
some water, some oil and a glass; blackboard and multimedia
teaching procedures:
step1.lead-in
ask the ss some questions as follows                                   
t: water is around us and inside us. we can’t go without water. qs:
why is water so important to living things?
can you point out some of its properties or characteristics?
 suggested vocabulary:
 it's colorless, tasteless, odorless and universal dissolvent.
 it feels wet;
 it exists in three forms: liquid, solid, gas, and is cycled through the water cycle;
 it can absorb a large amount of heat;
 it sticks together into beads or drops;
 it's part of every living organism on the planet; etc.
ask students the names of oceans and continents:the pacific ocean, the atlantic ocean, the india ocean, the arctic ocean; asia, africa, europe, the north america, the south america, antarctica, oceania
step2.warming up
use the water, the oil and the glass to do three experiments.  learn more about water’s properties by doing some simple experiments and learn to describe an experiment.
 what property of water does each of the four experiments illustrate?
 what causes this phenomenon?
 what’s this phenomenon related to?
  ① experiment 1 shows how air pressure causes a piece of thick paper to cling to an upturned glass of water.
  ② experiment 2 illustrates how substances with different density behave when placed in the same container.
 ③ experiment 3 is an example of how water dissolves substances and objects.