Animals adaptations

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  • Photo credit: © 2006 Jupiterimages Corporation
  • Photo credit: © 2006 Jupiterimages Corporation Teacher notes A shark’s teeth are not fixed to its jaw but embedded directly into the flesh. Its teeth are constantly replaced as they fall out or are broken, so that a shark may get through thousands of teeth during its lifetime. The lower teeth are mainly used for holding prey, while the upper teeth are used for cutting. The shark’s specialized sense organs include: lateral lines – a row of fluid-filled sensory canals along each side of the shark. These can detect movement and changes in pressure from about 100m away. ampullae of Lorenzini – small pits in the shark’s snout that detect tiny electrical fields, such as those associated with muscle contraction of prey. auditory system – can detect the sound created by injured prey from over 1 mile away.
  • Teacher notes This true-or-false activity could be used as a plenary or revision exercise on adaptation, or at the start of the lesson to gauge students’ existing knowledge of the subject matter. Coloured traffic light cards (red = false, yellow = don’t know, green = true) could be used to make this a whole-class exercise.
  • Animals adaptations

    1. 1. Starter: Use three words to describe each of these environments.The Arctic:1)2)3) The desert: 1) 2) 3)
    2. 2. Adaptation• Adaptation is a special feature or behaviour that makes an organism particularly suited to its habitat.• Adaptations may be general or specific.• General = having legs to walk or fins to swim• Specific = special features so an animal can survive in is environment
    3. 3. A Shark’s General AdaptationsWhat are a shark’s general adaptations to life in an aquaticenvironment? streamlined shape to reduce friction when moving through water gills have a large surface area so that oxygen can be extracted from the fins provide surrounding water stability, power and control
    4. 4. A Shark’s General AdaptationsWhat are a shark’s specific adaptations to life as an aquaticpredator?specialized sense organs can highly sensitivedetect the sound, movement and sense of smell thatelectrical fields of other organisms can detect drops of blood from miles away lots of very sharp teeth that are constantly replaced silver colouring underneath acts as camouflage
    5. 5. Compare these two animals… Desert Fox Arctic Fox
    6. 6. Adaptations• The two environments we saw before are harsh environments for animals to survive in so the animals have had to adapt to survive.
    7. 7. Animals in Cold Climates• Arctic animals must keep themselves warm to survive.• You loose body heat through your body surface, mainly your skin.• Arctic animals have developed many adaptations to help them survive…
    8. 8. Look at the following… What do these animals have in common?
    9. 9. Animals in Cold ClimatesCommon features:- Thick fur coats- Layer of blubber under the skin- Colour – many change colour in the summer- What about body shape?
    10. 10. Body Shape- Have fat, round bodyshapes with short legs- Have small ears –why?
    11. 11. Animals in Dry Climates• Animals in dry climates have to keep themselves cool to survive.• They also have to cope with a lack of water.• This means they are unable to loose heat through sweating – why?
    12. 12. Look at the following… What do these animals have in common?
    13. 13. Animals in Dry ClimatesCommon features:- Large thin ears- Little body fat- Thin, silky fur- Long limbs to help spread heat- They also often only come out at night. Why?- What about body shape?
    14. 14. Body Shape
    15. 15. Surface Area to Volume Ratio• Animals loose heat from the body surfaces that are in contact with the surrounding air/water.• Reducing this contact surface reduces heat loss• Increasing the surface increases heat loss
    16. 16. Surface Area to Volume Ratio Hidden surfaces are exposed
    17. 17. Compare these two animals… Desert Fox Arctic Fox Can you add any adaptations or reasons for the adaptation?
    18. 18. True or false?

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