人教版高中英语选修七：Unit 3 under the sea Warming up and pre-reading课件（17张）

课件17张PPT。Unit 3Under the seaWarming up and pre-readingA documentary, OceansOceans is a 2009 French nature documentary film by Jacques Perrin distributed in the United States by Disneynature. It was released on April 22, 2010 in 1,200 theaters in the US for Earth Day. It was filmed in over 50 different places and took four years to film. It is a high-quality filming documentary featuring ocean animals. It reflects the need to respect nature and demonstrates the negative aspects of human activity on animals.Have you seen plants and animals that live under the sea? Where did you see them? Find out from your classmates where they saw them. Use the list below to help you.on a snorkeling trip at an aquarium on a boat tour in books in films on TV nature programmes on the InternetWarming upThere are many beautiful plants and animals in the sea.coraldolphinshark turtlebutterfly fishsquid snorkelingIf you like, you can go to see more about them at an aquarium.What do you know about “killer whales”?Male whales can reach lengths up to 27 feet and can weigh up to 12,000 lb. You can tell an adult male from an adult female by the shape of their dorsal fin (male’s longer, up to 6 feet tall). Killer whales are found in all oceans of the world. As a group, killer whales are known to eat fish, squid, seals, sea lions, penguins, even other whales. Thus, they are called “Killer Whales”.Scientific name: Orcinus OrcaWhat about baleen whales?Baleen whales are whales that have no teeth. They take in huge mouthfuls of water and filter it, trapping small fish and invertebrates. There are several species of baleen whale such as the blue whale, the humpback whale and the right whale.Whaling operated between the 1830s and the 1920s on the southeastern coast of Australia at a place called Eden, where Clancy’s stories are set. There are many stories of killer whales cooperating with the whalers there to catch the baleen whales that migrated and later down the coast every winter and spring. Old Tom was one of the killer whales and his skeleton is displayed in the Killer Whale Museum in Eden.Eden Killer Whale Museum In real life, whales are harmless to us. We should respect them, just like any other animal on earth. Still, nowadays we kill thousands of whales and most of us don’t know that whales are endangered. Learn more about and whales and whaling on the Internet. 2. Preview the reading text on Page 20. Homework