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BIOLOGY

BIOLOGY. for students at 9. form 14-15 years old. What does the picture show?. Use questions like: Has it got … ? Does it have … ? Is there … ?. POLARBEAR. Find words connected to the Polar bear! The words must start with one of the letters. P O L A R

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BIOLOGY

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  1. BIOLOGY for students at 9. form 14-15 years old

  2. What does the picture show? Use questions like: • Has it got … ? • Does it have … ? • Is there … ?

  3. POLARBEAR

  4. Find words connected to the Polar bear! The words must start with one of the letters. P O L A R B E A R

  5. P O L A R C T I C R B E A R

  6. P O L A R C T I C R B E C I T C R A T N A R

  7. Pre-teaching vocabulary

  8. Label the picture! fur ear paw with claws the muzzle

  9. Read the text and answer the questions! • Where does the polar bear live? • What does the polar bear eat? • What does it look like?

  10. http://www.cueprompter.com

  11. How is/are the ... adapted to the Arctic? Group A : feet Group B : fur Group C : ears Group D : skin

  12. the fur and the hair the ears the skin the paws and claws

  13. How is/are the ... adapted to the Arctic?

  14. Build new groups expert group >>> exchange group

  15. How is/are the ... adapted to the Arctic?

  16. Adaptation • fur on the soles of the feet • large feet • large body • sharp claws and teeth • small ears • strong legs for swimming and running • thick layer of blubber – fat • layer of white fur Reason • catching and eating prey • insulation and a store of energy • insulation against the cold, and for camouflage • spreads the load on snow and ice • better grip on ice and for insulation • reduces heat losses • helps them catch their prey • gives a small surface area to volume ratio (reduces heat losses)

  17. 1. think: Draw lines between the adaptations and the reasons.2. pair: Exchange answers with your partner.3. share: Tell the class what you have agreed upon. Use these phrases! ... because ... ... isusefulfor... ... in order to ... ... so ...

  18. Adaptationsandtheirreasons:teacher‘ssolution / correction Adaptation • fur on the soles of the feet • large body • large feet • sharp claws and teeth • small ears • strong legs for swimming and running • thick layer of blubber – fat • layer of white fur Reason • better grip on ice and for insulation • gives a small surface area to volume ratio (reduces heat losses) • spreads the load on snow and ice • catching and eating prey • reduces heat losses • helps them catch their prey • insulation and a store of energy • insulation against the cold, and for camouflage

  19. Adaptationsandtheirreasons:teacher‘ssolution / correction Adaptation • fur on the soles of the feet • large body • large feet • sharp claws and teeth • small ears • strong legs for swimming and running • thick layer of blubber – fat • layer of white fur Reason • - better grip on ice and for insulation • - gives a small surface area to volume ratio (reduces heat losses) • - spreads the load on snow and ice • - catching and eating prey • - reduces heat losses • - helps them catch their prey • - insulation and a store of energy • - insulation against the cold, and for camouflage

  20. Thank you for being nice students  Johanne Heike an ear a muzzle

  21. Adaptations of the Polar BearWritten by C.J.Idelberger and H. Szallies Animals and plants are adapted to their environment. They have characteristics that allow them to live there. This makes them better able to compete for limited resources. One example for this is the polar bear. It is living in the Arctic where it is very cold. Living in the ice is a problem when you need to keep warm. Another problem is getting enough food when there are no plants. So the polar bear has “invented” a lot of things to be able to survive. Have a look at the fur first: It consists of hairs which are hollow. It keeps the air inside which keeps the bear warm and floating in the water.

  22. The fur is white and absorbs the sunlight, sending the warmth to the black skin which then heats up (try going out in black clothes on a hot summer day and you will get the point  ). Under the skin there is a thick layer of blubber, which is just another word for lipids or fat. It can be up to 11 cm thick and insulates the bear from the arctic cold. When a bear is hunting animals for food it can sometimes overheat. As it cannot sweat, it has to cool down by jumping into the icy water or hunt in the water in the first place. Another way to prevent overheating is simply moving slowly and having a good rest every now and then. The bear can lose heat through areas where there is no fur. They also lose warmth at their ears, muzzles, feet and pads because these parts stick out of the body.

  23. Let’s have a closer look at the ears: They are very small and round so that no water can come in when they go swimming. If water got into the ears, the eardrums could freeze. If the ears were larger, the polar bear would lose too much of the warmth. The last adaptation to the Arctic are the feet which always touch the ground. The pads are very hard and there is a lot of long, stiff hair between the pads. The hair protects the bear’s feet from the cold and it has one more big advantage: It helps the bear to have a good grip on the ice so that it can run fast! When it wants to sleep it digs a hole in the ground with its sharp claws and lais down so that the icy wind (unbroken by trees or vegetation) cannot touch it.

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