選修Unit Under the seaWarming up

1、 Under the SeaUnder the SeaWarming upWarming upUnitUnit 3 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 mrin animals海洋動物海洋動物 . Come on!Dolphins 海豚海豚What are they?What are they?S

2、ea turtle 海龜海龜Look. Its coming towards us.Look. Its coming towards us.Sea horse海馬海馬Whats this?Whats this? Squid 魷魚魷魚：skwid Sea star 海星海星This looks beautiful!This looks beautiful! Jellyfish 水母水母：delifi Coral 珊瑚珊瑚：krl Angel fish 天使魚天使魚：eindl Different kinds of little fishDifferent kinds of little fish

3、Anemone fish 海葵魚?？~：nem,ni Clown fish：klaun葵魚，白頭翁魚葵魚，白頭翁魚 parrotfish鸚鸚鵡魚鵡魚Whitewhale白鯨白鯨Killerwhale虎鯨虎鯨seahorse海馬海馬clam蛤蛤A shark is coming. A shark is coming. Look out! Look out! Its dangerous.Its dangerous.He noticed us. Wed better leave He noticed us. Wed better leave him alone before its too late

4、.him alone before its too late.Bye, MrBye, Mr Shark! Shark!We are safe now.And I caught a sea star near the shore.If you like, where can you go to see more about the ocean life? on a boat tripatanaquariumon a snorkelling tripOn a snorkeling tripAt an aquariumOn a boat tourIn booksIn filmsOn TV natur

5、e programmesOn the InternetWhats happening in the pictures?A Killer Whale Whales are huge, intelligent seamammals. ：mml哺乳動物 They breathe air through blow-holes into lungs (unlike fish who breathe using gills) ：gil(魚魚)鰓鰓 . Whales have smooth, shiny, streamlined (流線型）流線型）bodies that move easily throug

6、h the water. What is a whale? There are two types of whales alive today: toothed whales (齒鯨類齒鯨類) and baleen whales(須鯨須鯨類類). Toothed whales have teeth and a single blowhole. They feed on eating fish and other sea mammals. Baleen whales are larger than toothed whales. They are filter feeders (濾食者濾食者)

7、that use baleen to sieve (過濾過濾) food, and have two blowholes. Classification of whales Killer whales (虎鯨虎鯨) belong to toothed whales, who are the king of the sea, biggest carnivore(食肉動物食肉動物) of the sea, killing all kinds of animals in the sea, even the huge blue whale, like tigers on land, working i

8、n a team.Average lifespan: 50 to 80 years Size: 7 to 9.7 m Weight: 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. Baleen whales_whalewhale_whales _whales _What is happening in the picture?The killer whales The killer whales help/ass