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1、Usinglanguage(2)ListeningandSpeaking1.Get the main idea of the listening material;2.Understand the relationships between different species and the importance of ecological balance.Look at the diagram and answer the questions.51.What does the diagram show?2.What are the relationships between the livi
2、ng things?The diagram shows a food chainthe connection between the living things.The living things are closely connected with each other by the food they eat.Secondary consumers prey on primary consumers,primary consumers feed on producers,and producers absorb light from the sun,and water and dissol
3、ved nutrients from the soil,which are provided by decomposers.In a woodland ecosystem,trees and other plants are producers.They 1._ water,and take in nutrients from the soil and energy from the sun.Insects are an example of a primary consumer.They 2._ the producers to provide food for them,and are 3
4、._ by secondary consumers:small mammals and birds.They 4._ the primary consumers.Worms,fungi and bacteria are decomposers.They 5._ animal waste and the remains of living things.The chemicals these decomposers 6._ fertilise the soil and give the plants the nutrients they need to grow.absorbrely on fe
5、d onprey onbreak downrelease6Complete the speech with the correct form of the words and expressions in Activity 5.One of the oldest species in the ecosystem,the honey bee has been in existence for millions of years.A honey bee can fly as fast as 24 kilometres per hour and its wings can beat 200 time
6、s per second.In just one journey to collect pollen and nectar,one single honey bee can pollinate as many as 50 to 100 flowers.7Listen to the conversation and choose the true statements.1 Bees are very important to our food supply because they provide honey.2 The bee population is declining.3 Without
7、 bees,humans would die out.4 All human crops depend on bees for pollination.5 If bees became extinct,other insects could pollinate enough crops.6 Humans are responsible for the decline in the bee population.8Listen again and complete the flow chart.A combination of things damages bee habitats,mainly
8、 1._.pesticides and climate changeThe bee population is 2._.According to statistics,bee numbers in the US 3._ in just one year.declining very quicklyhave fallen by 17%Without bees,crops would 4._.5._ would not be able to compensate for the loss of bees,because 6._of the species of crops.be unable to
9、 reproduceOther insectsbees are responsible for pollinating about 70%Animals that live on the crops 7._.Humans have nothing to eat and die out.would die outExpressing doubtResponding to doubt You must be kidding!Are you sure about.?I dont believe it!Check it out for yourself.Its a fact!According to
10、statistics.Dont forget that You must be kidding!I dont believe it!Are you sure about.?Its a fact!Dont forget that Check it out for yourself.According to statistics.9Complete the boxes with the expressions from the conversation.Meg:Hey Ollie,have you heard that the bee population is declining?Ollie:N
11、o,I havent.But,thinking about it,I hardly ever see bees these days.When I was little,they seemed to be everywhere!Meg:If bees die out,humans will die out too.Ollie:What?!You must be kidding!I dont believe it!Meg:Its a fact!I watched a nature documentary all about it the other evening.Bees are very i
12、mportant to our food supply.Ollie:How can that be possible?Humans wont die out just because theres no honey!Meg:Bees dont just make honey.Dont forget that bees are also responsible for pollinating plants.Without them,crops would be unable to reproduce.Ollie:But surely there are other ways of getting
13、 these crops to reproduce.Does it have to be bees?Meg:Well,there are other insects that pollinate plants,but its unlikely that they would be able to fully compensate for the loss of bees.Bees are responsible for pollinating about 70%of the species of crops.Listening materialsOllie:Are you sure about
14、 that data?It sounds rather exaggerated.Meg:Watch the documentary and check it out for yourself if you dont believe me.Without bees,numerous plant species would die out.Animals that live on the crops would die out,and we wouldnt have enough to eat.Ollie:Seriously?Thats scary!But looking on the brigh
15、t side,there are millions and millions of bees.Theyre not going to die out any time soon.Meg:Im afraid youre wrong.The bee population is declining very quickly.According to statistics,bee numbers in the US have fallen by 17%in just one year.Ollie:Gosh!What caused that?Meg:A combination of things,rea
16、lly,but its mainly due to damage to their habitats caused by pesticides and climate change.Ollie:So human activity is the main cause?Meg:Thats right.Ollie:Well,in that case,wed better do something before its too late.Work in pairs.Talk about what would happen to the ecosystem if another species died out.Use the words and expressions in this section.10
