课件30张PPT。 Under the SeaUnit 3Today, we’re 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.We’ll come across a great variety of marine animals. Come on!Dolphins 海豚What are they?Turtle 海龟Look. It’s coming towards us.Sea horse
海马What’s this? Squid 鱿鱼Sea star 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!
It’s dangerous.He noticed us. We’d better leave him alone before it’s too late.
Bye, Mr 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 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 plants and animals.What’s happening in the pictures?A Killer Whale Whales are huge, intelligent sea
mammals. 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 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. Classification 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
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 whalesWhat do you think is happening in
the picture?Read the introduction of the passage on
page 19 and then fill in the chart below. Clancy A whalerAnecdotesAt the beginning of the 20th
century Southeastern coast of AustraliaThe killer whales helped
the whalers kill baleen
whalesBrief introduction of the passageHomework Look up the new words
and expressions of the
reading in the dictionary.
2. Preview the reading:
OLD TOM THE KILLER
WHALEThank you.课件9张PPT。in groups 成群地；一群一群地
①There are students standing in groups in front of the teaching building.
学生们三五成群地站在教学楼的前面。
②Social psychology, strictly speaking, deals with the behavior of people in groups.
严格地说，社会心理学家研究人们的群体行为。[知识拓展]
(1)in pairs 成对地；成双地
(2)in rows 一排一排地
(3)in line成一直线，排成一行[知识运用]
采用适当的名词填空：
①The students all stand in________to get their new books.
②They just sit or stand around in________and talk.
③The students were practising English conversation in________.
④He had ranged the bottles from small to large in______against the wall.
答案：①line ②groups ③pairs ④rows/line
