高中英語（人教版）選修九 同步課件 u4p3 using language

1、Using LanguageUnit 4Wordsrot nectar bat evolve attach moth waspbeetletypicalvt. & vi. 腐爛; 腐敗 n. 花蜜; 甘露n. 蝙蝠vt. & vi. 發(fā)展; 進展; 進化vt. 縛上; 寄上n. 蛾n. 黃蜂n. 甲蟲adj. 典型的; 有代表性的petal tube delicatefragrant daisyodourodourlessdullmustyfruity n. 花瓣n. 管; 管子adj. 精巧的; 脆弱的adj. 芬芳的; 香的n. 雛菊n. 氣味; 香氣; 臭味adj. 沒有氣味的; 無臭的

2、adj. 不鮮明的; 陰暗的adj. 發(fā)的; 有霉味的adj. 果味的; 有葡萄味的Expressionsattach to give out帖上; 附上發(fā)出 (氣味,熱等) ; 分發(fā)How would you describe each plant? What do you think is unusual about each plant?2. One of the pictures shows pitcher plants and another shows “l(fā)iving stones”. Which picture shows which plant? The name of the

3、 plant in the other picture is Rafflesia. In groups, look carefully at the photos of the plants and answer the questions.living stoneRafflesiapitcher plantsNow listen to Mark, Gordon and Andrea telling their class about these plants. Which student talks about which plant?Plant ABCStudents nameName o

4、f the plantMarkPitcher plantLiving stones or LithopsGordonRafflesia arnoldiiAndrea3 Listen again and complete the table with the correct information. You might need to listen several times.MarkGordonAndreaName of the plantReason for its namepitcherplantliving stonesRafflesiaarnoldiiIts shaped like a

5、 pitcher.They look like stones.MarkGordonAndreaIts smellIts shapeIts sizelike a pitcherroundedlike rottingmeatone meter widesmallround with large thick petalsMarkGordonAndreaHow it gets its foodWhere it livesfrom insects that fall into the pitcherfrom thesoilHot dryplaces inSouth Africa,NamibiaFrom

6、AnotherplantJungles in parts of IndonesiaMarkGordonAndreaWhat its leaves are likeHow common it isHow it is pollinatedshape likepitcherround like stonesdoesnt have leavesit is becoming rareInsects that eat dead animalsUNUSUAL PLANTTH: Today Mark, Gordon and Andrea are going to tell us about some unus

7、ual plants. Mark, do you want to go first?M: Sure. Today, I want to talk about an insect-eating plant called a pitcher plant. Listening textListen to Mark (M), Gordon (G) and Andrea (A) telling their class and their teacher (TH) about some plants.Heres a photo of it. Look at this part here. Its shap

8、ed like a pitcher. Its actually a leaf even though it looks like a flower. Its really clever-the insects are attracted by the sweet smell coming from what they think is a flower. But its a trap. Once an insect goes down into the pitcher, it cant get out as there are small hard hairs pointing downwar

9、ds that prevent it from escaping. In the end, the insect falls down into a pool of liquid at the bottom of the pitcher and gets digested by the plant.S1: Thats amazing!S2: What fantastic plants!TH: Gordon.G: These are the plants Im going to talk about. Theyre often called “l(fā)iving stones”, but even t

10、hough they do look a bit like stones, they are in fact plants.S3: Wow!S4: How interesting!G: Their scientific name is Lithops and they come from South Africa and Nambia. The body of a lithops is actually a pair of leaves that have become rounded like a stone. This is because this plant lives in very

11、 hot and dry places. When the leaves are shaped like this, not much water is lost from the plant. Another interesting thing about these strange plants is that theyre the same colour and appearance of the soil and stones around it. This makes them less obvious to animal looking for food.TH: Thanks, G

12、ordon. Andrea.A: Im going to tell you about Rafflesia arnoldii, a plant that has a flower about one metre wide. In fact, its the largest flower in the world. Rafflesia arnoldii doesnt have any leaves, stems or roots. It doesnt need them as its a parasite. It gets this food by living on another plant

13、. You might think that this flower should smell wonderful but it actually looks and smells like rotting meat!S2: Oh, yuck!S1: Thats disgusting!S3: I think its fantastic!A: Me too. Anyway, it attracts insects that eat dead animals but instead of getting a feed, the insects pick up its pollen and spre

14、ad it to other Rafflesias, Rafflesia arnoldii grows in the jungles in Indonesia but as the forests are being cut down, its becoming very rare.TH: Thanks Andrea and thanks everyone. Those plants are certainly fascinating.Reading taskFlowers and their animal pollinators BeeHumming-birdsButterflies mot

15、h Answer the questions.What is the advantage for animals of visiting flowers?2. Why do some plants need animals? Animals get food called nectar from the flowers.Some plants need animals to pollinate them. An animal pollinates a flower by collecting pollen from a flower and passing it onto another fl

16、ower.3. How does an animal pollinate a flower?4. What features of a flower are important in attracting animal pollinators? The features of a flower that are important in attracting animal pollinators are its colour, shape, sizeand smell.5. What is nectar?6. What kinds of animals are most flowers pol

17、linated by? Nectar is a sweet liquid produced byflowers and collected by bees.Most flowers are pollinated by bees, moths and butterflies.True or false1. Bees follow coloured lines to the nectar inside the flower. 2. Flowers that are white or pale can be seen by night pollinators. 3. Butterflies are

18、attracted to sweet-smelling flowers. TTF4. Bats pollinate flowers at night. 5. Flower colour is not important to hummingbirds. 6. All pollinators need to land on the flower if they are to find the nectar. TFFFind other nouns in the chart that mean the seam as “smell”. List adjectives from the chart that are used to describe different kinds of smel