1、Under the SeaUnit 3Today,were going to take a look at the world under the sea.So,are you ready?Now,we are on a snorkeling trip under the sea.Well come across a great variety of marine animals.Come on!Dolphins 海豚What are they?Turtle 海龟Look.Its coming towards us.Sea horse海马Whats this?Squid 鱿鱼Sea star
2、海星This looks beautiful!Jellyfish 水母Coral 珊瑚Angel fish 天使鱼Different kinds of little fishAnemone fish 海葵鱼Clown fishA shark is coming.Look out!Its dangerous.He noticed us.Wed better leave him alone before its too late.Bye,Mr Shark!We are safe now.And I caught a sea star near the shore.If you like,where
3、 can you go to see more about the ocean life?on a boat tripin books,on the Internet,in the Ocean Park,on TV etc.at an aquarium In groups,make a list of plants and animals that live under the sea that you and your classmates have seen in any of the ways listed above.Share what you know about these pl
4、ants and animals.Whats happening in the pictures?A Killer Whale Whales are huge,intelligent seamammals.They breathe air through blow-holes into lungs(unlike fish who breathe using gills).Whales have smooth,shiny,streamlined(流线型）bodies that move easily through the water.What is a whale?There are two
5、types of whales alive today:toothed whales(齿鲸类)and baleen whales(须鲸类).Toothed whales have teeth and a single blowhole.They feed on eat fish and other sea mammals.Baleen whales are larger than toothed whales.They are filter feeders(滤食者)that use baleen to sieve(过滤)food,and have two blowholes.Classific
6、ation of whales Killer whales(虎鲸)belong to toothed whales,who are the largest of the dolphins and king of the sea,biggest carnivore(食肉动物)of the sea,killing all kinds of animals in the sea,even the huge blue whale,like tigers on land,working in a team.Average lifespan:50 to 80 years Size:7 to 9.7 m W
7、eight:up to 6 tonsKiller whalesBaleen whales are characterized by having baleen plates for filtering food from water,rather than having teeth.Baleen whales are generally larger than toothed whales,and females are larger than males.This group includes the largest known animal species,the Blue Whale.B
8、aleen whalesWhat do you think is happening inthe picture?Read the introduction of the passage onpage 19 and then fill in the chart below.WriterVocationStyleTimePlaceMain ideaClancy A whalerAnecdotesAt the beginning of the 20thcentury Southeastern coast of AustraliaThe killer whales helped the whalers kill baleen whalesBrief introduction of the passageHomework1.Look up the new words 2.and expressions of the 3.reading in the dictionary.2.Preview the reading:OLD TOM THE KILLER WHALE
