Unit 5 The power of nature教案
a.other scientists predict the progress of lava from the volcano
b.many people have been warned to leave their homes
c.the eruption causes less damage
d.the eruption may be prevented from breaking out
2.read the third and the fourth paragraphs and finish the following tasks.
①what made the writer realize that an eruption occurred?
②what does the writer mean by using “lucky” in the sentence “i was lucky enough to have a much closer look at it”？
a.he felt much safer on the top while the other two scientists climbed into the crater.
b.it was his first sight of an eruption.
c.it was the first time for him to watch the crater.
d.both b and c.
3.read the last paragraph and prepare 1－2 questions to ask your partners about it.
step ⅳ：searching reading
1.analyze the sentence.
having collected and evaluated the information，i helped other scientists to predict where the lava from the volcano will flow next and how fast.
having collected and evaluated the information是______，在句子中作______；predict后是由where和how引導的兩個______。
2.which sentence in the test can be replaced by the following one.
the reason why i don't mind that my job is sometimes dangerous is that danger can be exciting and make me full of energy.
________________________________________________________________________
3.i am still amazed at their beauty as well as their potential to cause great damage.“potential” means：
a.possibility b.opportunity
4.translate the following sentence into chinese.
having studied volcanoes now for many years，i am still amazed at their beauty as well as their potential to cause great damage.
________________________________________________________________________
step ⅴ：discussion
having learned a little more about the work of a volcanologist，what qualities do you think a volcanologist should have？what quality do you think is the most important？and give your reasons.
do you like to be a volcanologist?
step ⅵ：homework
1.for more information about natural forces，you may refer to：
2.finish the exercises in discovering useful words and expressions on page 36.
教學參考
mount etna
sicily's greatest natural attraction is also its highest mountain.to the ancient greeks，mount etna was the realm of vulcan， god of fire ，and the home of the one－eyed monster known as the cyclops.at approximately 3350 meters，it is europe's highest active volcano.the size of the summit changes with each eruption，and over the centuries a few lava flows have reached the coast.over 1200 square meters of etna's surface is covered with solidified lava.etna offers skiing in the winter months and breathtaking hikes in the woods during the summer.there are also a number of smaller peaks on the slopes of etna，and some interesting caverns.since etna is a strato volcano，with relatively cool lava temperatures and numerous openings(vents)，nobody ever knows precisely where on its vast surface the next eruption will be.etna's long recorded history has proven invaluable to the world's volcanologists.