Unit+5+Revealing+nature+Starting+out++Understanding+ideas课件【高效备课精研+知识精讲提升】 高中英语外研版选择性必修第一册.pptxVIP

新外研社高中英语选择性必修一Unit 5 Revealing natureStarting OutUnderstanding Ideas Activity 1 Look at the page from a science magazine and answer the questions.1. What do you know about these animals?What makes them special?2. What other similar animals do you know about? Share your knowledge with the class.They are all species that survived for thousands of years on earth; They are old and rare (unusual).Jellyfish（水母）Jellyfish are soft-bodied，free-swimming aquatic（水生的）animals with an umbrella-shaped bell.They are found in every ocean.Starting out Komodo dragon（科莫多巨蜥）:Komodo dragons were first encountered by Western researchers in 1910. The researchers said the ancestor of the Komodo dragon most likely evolved in Australia and spread westward, reaching the Indonesian island of Flores 900,000 years ago.The Komodo dragon is the largest lizard in the world. It can grow to three metres in length and can weigh about 135 kilograms. Despite its size and weight, it can run for short distances at up to 20 kilometres per hour. Duck-billed platypus（鸭嘴兽）:The first scientists to examine a preserved platypus body judged it a fake in the late 18th century. The oldest discovered fossil of the modern platypus dates back to about 100,000 years ago.The duck-billed platypus is a small egg-laying mammal (up to 60 cm in length) found only in Eastern Australia including Tasmania. As its name suggests, it has a mouth that looks like a duck’s bill, while its thick fur and flat tail are similar to those of a beaver（海狸）. Nautilus（鹦鹉螺）:As one of the oldest sea animal in the world, the nautilus has hardly changed in about 500 million years, and that is why it is often given the name “living fossil”. 1. How can seeds travel? How can this benefit plants?2. Can you think of another example of seeds travelling? Share it with the class.Watch the video and answer the questions.Activity 2 How seeds travel?How can seeds travel? Seeds cane travel great distances by being carried by the _________ , upon the ______