Zoology教案

suggested answers:��
r:please tell us about your work.what is your theory?what is it that you want to show?��
you:i have an assumption that bees can use a kind of “language” to communicate with each other.i want to show that bees convey some information when they are dancing.��
r:i see.so you believe that the bees use a dance to communicate.what does the dance look like?��
you:the bee moves sideways in the wagging dance:the dancer runs in a straight line,wagging from side to side.then it turned in a semicircle,ran straight again,and turned in another semicircle to the opposite side.��
r:you have set up two feeding places here.one is very close to the beehive,one is about three hundred metres away.why have you done that?��
you:i assume that bees convey more information than food.in order to find out whether my assumption is correct,i have set up two feeding places.one is very close to the beehive,the other is in a far-away place.��
r:the bees all look the same to me.how do you distinguish one bee from another?��
you:i mark all the bees that come to the nearby feeding place blue and all the bees that go to the far-away place red.in this way i can tell them apart easily.��
r:how were you able to come to a conclusion?��
you:i did more experiments in order to ob-tain enough data to provide an adequate account of the bees’ behaviour.��
r:it must have been difficult to get enough information.how did you know if the dance told the bees exactly where the feeding place was?��
you:by doing a lot of experiments,i knew that the dance coveyed news of food.it was evident that the circle dance told the bees about the location of the food while the wagging dance told the exact distance to the feeding place.��
r:what was the most important thing you have learnt about the bees?what became clear as you studied the bees?��
you:the most important thing i learnt about bees was that bees can communicate with each other by dancing in different ways.as i studied the bees,it came to light that bees fly a maximum distance of 3.2 kilometres between their hive and a feeding place.��
step ⅳ grammar��
t:we’ve learnt some modal verbs before.we all know that modal verbs are difficult to master in english.now look at the sentences on the screen.the underlined parts are all modal verbs.please give the chinese for each sentence and explain the use of modal verbs in it.��
(teacher shows the following on the screen.)��
1.ellen should have kept his promise.i wonder why he changed his mind.��
2.you ought not to eat too much junk food.��