高二【英语（外研）】选择性必修一Unit 5 Revealing nature (2)-课件.pptx

;;Learning objectives;What is biodiversity in your mind?;Reading for information;1. What species are mentioned and what is special about them? 2. What other unusual life forms do you know of? ;1. What species are mentioned and what is special about them? Earth is home to millions of different species. Some can be very small, like bacteria and viruses, which are so small that we 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. ;1. What species are mentioned and what is special about them? The toughest species is probably the water bear. This tiny organism can survive temperatures from 150℃ to a below freezing -272℃. To best survive in their environment, each species has developed its own unique physical characteristics. ;1. What species are mentioned and what is special about them? Two species are mentioned: The blue whale and the water bear. The blue 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? Vipers, elephants and pandas are very unusual. You can have your own answers. ;A map of the Galapagos Islands; Tortoises, mangroves and iguanas are mentioned. ;ancestor scientific be native to primitive habitat appearance be home to ecosystem ; The Galapagos Islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz several species of giant tortoise that the Galapagos Islands. The island is also home to the Charles Darwin Research Station, where studies are carried out. ; Mangroves are one of the coastal plants that grow on Isabela. They serve as the