1、Unit 1 Project Producing a TV showShark attacks Shark SpeciesWhale sharkBasking sharkGreat whiteTiger sharkBlue shark What are Sharks?Sharks are fish that have been around since the dinosaurs.Males are called“Bulls”.Females are called Cows.Baby Sharks are called Pups“.More information(http:/new- sha
2、rk facts Sharks have five to seven gill slits.Many sharks must keep moving in order to breathe that is,in order to keep water moving past their gill slits but this is not true of all species.Nurse sharks,for example,can lie still and fan their gills to bring oxygen-rich water across the slits.Becaus
3、e they lack a swim bladder,all sharks must swim in order to avoid sinking toward the ocean floor.The shark has senses specially adapted for the animals life underwater.Smell is a sharks most acute sense.Approximately 70 percent of the sharks brain is used for olfactory(smelling)functions.Experiments
4、 have shown that sharks can detect prey solely by smell,and the hungrier the shark,the less stimulant needed to elicit a reaction.Sharks are sensitive to light and can detect certain objects even in murky water.Some have a tapetum lucidum,a mirror like layer under the retina of the eye that reflects
5、 incoming light and increases the amount of light available to the eye.(Cats and other animals whose eyes glow in the dark also have this feature.)Sharks do have ears,but the role of hearing in the sharks location of prey is not well understood.A shark can detect sound waves and disturbances in the
6、water with its lateral line,or lateralis,system.This is a series of thin canals,filled with water,that runs along the animals side.The canals are attached to nerves that send signals to the sharks brain.Sharks can also sense electric and magnetic fields.Sensory pores located on the sharks head can d
7、etect a preys bioelectric field even if the prey is buried in sand.A shark can also detect the Earths magnetic field.Open-ocean sharks may use this information to navigate and orient themselves.Fast reading:1.What do you know about sharks?2.How many different types of sharks are there in the ocean?3
8、.Do all of them attack humans?4.How to avoid being attacked by sharks?5.What are their unique senses?Second reading:Read the text again and try to find out the main idea of each paragraph.Paragraph 1:There are nearly 400 types of sharks.Paragraph 2:Sharks do not feed on humans.Paragraph 3:Threre are
9、 three types of shark attracks.Paragraph 4:An increase in water sports has led to an increase in shark attracks.Paragraph 5:There are three tips on what to do if a shark attracks.Paragraph 6:Do not be frightened by sharks.Detailed reading Three fierce sharks:Fill in the informationthe great white sh
10、arkthe tiger sharkthe bull sharkFour pieces of advice to avoid shark attacks:Dont swim in the dark.Dont swim if you are cut or if you have a fresh wound.Dont wear bright clothing or jewellery.Try and stay in groups.Three tips to help you if a shark attacks you Dont panic.Hit the shark on the nose.St
11、ick your finger in the sharks eye.Language focusIm sure you are clever enough to work them out！1.He has much _ of winning the first prize.2.The chances are a hundred to one against you,its most _ that you will succeed.3.What does the little dog chiefly _ _?4.Dont hit him _ _ head!5.Why not wear some
12、 flowers instead of _ when you go to the ball?chanceunlikelyfeed onon thejewelleryUseful phrases 1.mainly because2.two other sharks3.the chances of being pared to5.many more people6.the low number7.feed on8.be fit to do9.wait for sb to do10.the latter two 11.follow the advice12.have a fresh wound13.
13、be more likely to be deadly14.over a long distance15.wear bright clothing or jewellery16.hit the shark on the nose17.stick your finger in the sharks eye18.30 times greater Practice Summarize the textTypes of sharksAdvice on reducing the chances of being attackedThe tips to help you when attacked Int
14、roducing the project:Producing a TV show about how an animal uses its senses.Planning Get into groups(6-8).Decide which animal to focus on.Clear assignments.The animals name Its unique senseDecide what type of show:A documentary,a drama,a cartoon,other showClear assignments Each member picks a diffe
15、rent topic to find information about Food(what the animal eats)Habitat(where the animal lives)Size(size of the animal or population)Myths about this animal(what people think)Preparing Visit a zoo,watch an animal documentary,look at books,surf the Internetto find information about the animal.What it
16、eats and how it finds food in the wildHow it protects itselfHow it communicates with other animalsHow it attacks people or other animals(if it does)How it helps people or other animals(if it does)Producing1.Focus your research on how your animal uses its senses.2.TV is very visual so pictures should
17、 be presented in an easy to see way.3.Each member must work on different part of the show,keeping in mind the overall design.4.Each member has to proofread the writin at least once,correct mistakes if there are any,and add any new ideas they can think of.Presenting Present your show to the class.Put you display on the display wall.Homework1.Do Parts partA,B and C on page 90 in Workbook.2.Review words and phrases in this unit.Thank you!
