1、外研选择性必修第一册 Unit 5Period 3Listening and Speaking学习目标学习目标12 To get the main idea of the passage and list expressions related to biodiversity by readingTo get the main idea of the listening material and write down useful expressions related to the topic of cells and bacteria and make a conversation abo
2、ut biodiversity目标一：目标一：To get the main idea of the passage and list expressions related to biodiversity by readingActivity 1:Read the passage quickly and get the main idea of it.Earth is home to millions of different species.Some can be very small,like bacteria and viruses,which are so small that we
3、 cannot see them with only our eyes.By contrast,the largest animal species so far found on our planet is the blue whale,which can grow up to almost 30 metres in length and weigh over 130,000 kilos.The toughest species is probably the water bear.This tiny organism can survive temperatures from 150 to
4、 a below freezing-272.To best survive in their environment,each species has developed its own unique physical characteristics.Each year,scientists identify around 15,000 new species.However,diversity on our planet is such,that there are still millions of species on Earth remaining to be discovered.I
5、t introduces the largest animal species:the blue whale and the toughest species the water bear and their characteristics.Activity 2:Read the passage and answer the questions.1 What species are mentioned and what is special about them?Two species are mentioned:The blue whale and the water bear.The bl
6、ue whale is the largest animal species on earth,which can grow up to almost 30 metres in length and weigh over 130,000 kilos.The water bear is the toughest species,which can survive in extreme temperature.2 What other unusual life forms do you know of?Activity 3:Complete the paragraphs with the corr
7、ectform of the words and expressions in the box.ancestor scientific be native to primitive habitat appearance be home to ecosystem1 The Galapagos Islands are renowned worldwide for their unique biodiversity.The Giant Tortoise Reserve on Santa Cruz 1_ several species of giant tortoise that 2_ the Gal
8、apagos Islands.The island is also home to the Charles Darwin Research Station,where 3_ studies are carried out.is home to are native to scientificancestor scientific be native to primitive habitat appearance be home to ecosystem2 Mangroves are one of the coastal plants that grow on Isabela.They serv
9、e as the 4_ for various birds and fish,and are very important to the 5_.habitatsecosystem3 Lguanas can be found on San Cristobal.They have a very special 6_,with comb-like spines on their back.There is evidence that all the different iguanas have developed from more 7_ ones and share a common 8_.app
10、earanceprimitiveancestor目标二目标二:To get the main idea of the listening material and write down useful expressions related to the topic of cells and bacteria and make a conversation about biodiversity Activity 1:Listen to the podcast and choose the statements that are made.1.Biodiversity is important.2
11、.Bacteria are always harmful to humans.3.Some species of bacteria are used in food production.4.Many species of bacteria recycle dead organic matter.5.Our immune systems are able to fight off all germs.Activity 2:Listen again and complete the fact sheet.CellsEvery living thing is 1 _.They are like 2
12、 _.In the human body there are about 3 _ human cells and around 4 _ bacteria cells.made up of cells bricks that are used to build housesthirty trillionthirty-nine trillionBacteriaMost bacteria in the human body can 5 _In the food production process,bacteria can 6 _ dead organic matter.help with dige
13、stionbreak downActivity 3:Complete the boxes with the expressions from the podcast.Do you know about.?By the way,.Actually,.Have you heard of.?In fact,.Speaking of which,.Checking background knowledgeAdding information Do you know about.?Have you heard of.?By the way,.Actually,.In fact,.Speaking of
14、which,.Activity 4:Work in pairs.Look at the pictures of the species native to different regions of China.Talk about biodiversity in China using the words and expressions in this section.Do online research to find more information.学习总结学习总结1 Can you list more words and expressions related to biodiversity?2 Can you introduce cells or bacteria?
