Adaptation ks4 001

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Adaptation ks4 001

  1. 1. POPULATIONS
  2. 2. Population size <ul><li>A population is the number of a species living in a particular area </li></ul>
  3. 3. What factors could change a population? <ul><li>Competition </li></ul><ul><li>Predation </li></ul><ul><li>Migration </li></ul><ul><li>Disease </li></ul><ul><li>Natural disasters </li></ul><ul><li>War </li></ul><ul><li>For food, water and space </li></ul><ul><li>Predators will eat prey and reduce the population (including the number of offspring) </li></ul><ul><li>Members of the population may leave the area </li></ul><ul><li>A disease could kill some of the population </li></ul><ul><li>Drought, fire, floods, volcanic eruptions etc could alter the habitat and affect the population </li></ul><ul><li>Wars can result in the death of many members of a population </li></ul>
  4. 4. What else can affect the numbers and the distribution of a population? <ul><li>How well are individuals adapted? </li></ul><ul><li>This will affect their survival in a habitat. </li></ul><ul><li>What else lives there? This may mean competition for food. </li></ul><ul><li>There may be predators. </li></ul>
  5. 5. Adaptation
  6. 6. What is adaptation? <ul><li>Adaptation describes how a plant of animal is able to survive in various environments </li></ul><ul><li>Well adapted organisms can cope with the different aspects of their environment, for example, the temperature </li></ul>
  7. 7. It is always a struggle for plants and animals to survive <ul><li>ANIMALS STRUGGLE : </li></ul><ul><li>For food </li></ul><ul><li>For water </li></ul><ul><li>For protection against weather </li></ul><ul><li>Against being eaten by predators </li></ul><ul><li>Against disease </li></ul><ul><li>Against accidents </li></ul><ul><li>PLANTS STRUGGLE : </li></ul><ul><li>For water </li></ul><ul><li>For light </li></ul><ul><li>For minerals in the soil </li></ul><ul><li>Against weather </li></ul><ul><li>Against disease </li></ul><ul><li>Against being eaten </li></ul>
  8. 8. How does adaptation help organisms? <ul><li>Well adapted organisms are better at coping with extremes of weather </li></ul><ul><li>They are better at competing for food </li></ul><ul><li>They are better at escaping from predators </li></ul><ul><li>They are more likely to survive in their habitat and produce offspring </li></ul>
  9. 9. An arctic habitat <ul><li>This sort of habitat can have extremely low temperatures </li></ul><ul><li>The ground is covered with white snow for most of the year </li></ul>
  10. 10. How are animals adapted to survive in the Arctic? <ul><li>Animals like polar bears will have a thick insulating coat </li></ul><ul><li>They usually have a large amount of body fat </li></ul><ul><li>They have a large body size to surface area ratio </li></ul><ul><li>They have a camouflaged coat </li></ul>
  11. 11. How do these adaptations help? <ul><li>A thick fur coat </li></ul><ul><li>Large body size to surface area ratio </li></ul><ul><li>A large amount of body fat </li></ul><ul><li>Camouflage </li></ul><ul><li>Traps heat to keep warm </li></ul><ul><li>Reduces heat loss by radiation </li></ul><ul><li>Acts as a food store and to keep warm </li></ul><ul><li>White fur is good camouflage to hide from prey </li></ul>
  12. 12. A desert environment <ul><li>A desert can have very little rainfall </li></ul><ul><li>There is a lot of sunshine during the day </li></ul><ul><li>There is very little shade </li></ul><ul><li>The temperatures can get very hot </li></ul><ul><li>At night it can become very cold </li></ul>
  13. 13. How is a camel adapted to survive in the desert? <ul><li>Camels can store large amounts of water in the fat in their humps </li></ul><ul><li>They have feet with a large surface area to allow them to walk on sand </li></ul><ul><li>They also have long eye-lashes to stop sand blowing into their eyes </li></ul>
  14. 14. How do reptiles survive in the desert? <ul><li>Most reptiles will find some shade under a rock during the hottest part of the day </li></ul><ul><li>When walking on hot sand a lizard will try to touch the ground with only a small area </li></ul><ul><li>This lizard keeps swopping feet, and only stands on two feet at a time </li></ul><ul><li>This snake keeps a loop of itself off the ground as it moves across the sand sideways </li></ul>
  15. 15. How do plants survive the desert? <ul><li>A cactus has a long tap root to reach water deep under the ground </li></ul><ul><li>It has a thick, fleshy stem to store water </li></ul><ul><li>It has needle-shaped leaves to prevent water loss through the stomata </li></ul><ul><li>The needles help to stop animals from eating it </li></ul>
  16. 16. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.
  17. 17. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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