Adaptation ks4

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  • 1. POPULATIONS
  • 2. Population size
    • A population is the number of a species living in a particular area
  • 3. What factors could change a population?
    • Competition
    • Predation
    • Migration
    • Disease
    • Natural disasters
    • War
    • For food, water and space
    • Predators will eat prey and reduce the population (including the number of offspring)
    • Members of the population may leave the area
    • A disease could kill some of the population
    • Drought, fire, floods, volcanic eruptions etc could alter the habitat and affect the population
    • Wars can result in the death of many members of a population
  • 4. What else can affect the numbers and the distribution of a population?
    • How well are individuals adapted?
    • This will affect their survival in a habitat.
    • What else lives there? This may mean competition for food.
    • There may be predators.
  • 5. Adaptation
  • 6. What is adaptation?
    • Adaptation describes how a plant of animal is able to survive in various environments
    • Well adapted organisms can cope with the different aspects of their environment, for example, the temperature
  • 7. It is always a struggle for plants and animals to survive
    • ANIMALS STRUGGLE :
    • For food
    • For water
    • For protection against weather
    • Against being eaten by predators
    • Against disease
    • Against accidents
    • PLANTS STRUGGLE :
    • For water
    • For light
    • For minerals in the soil
    • Against weather
    • Against disease
    • Against being eaten
  • 8. How does adaptation help organisms?
    • Well adapted organisms are better at coping with extremes of weather
    • They are better at competing for food
    • They are better at escaping from predators
    • They are more likely to survive in their habitat and produce offspring
  • 9. An arctic habitat
    • This sort of habitat can have extremely low temperatures
    • The ground is covered with white snow for most of the year
  • 10. How are animals adapted to survive in the Arctic?
    • Animals like polar bears will have a thick insulating coat
    • They usually have a large amount of body fat
    • They have a large body size to surface area ratio
    • They have a camouflaged coat
  • 11. How do these adaptations help?
    • A thick fur coat
    • Large body size to surface area ratio
    • A large amount of body fat
    • Camouflage
    • Traps heat to keep warm
    • Reduces heat loss by radiation
    • Acts as a food store and to keep warm
    • White fur is good camouflage to hide from prey
  • 12. A desert environment
    • A desert can have very little rainfall
    • There is a lot of sunshine during the day
    • There is very little shade
    • The temperatures can get very hot
    • At night it can become very cold
  • 13. How is a camel adapted to survive in the desert?
    • Camels can store large amounts of water in the fat in their humps
    • They have feet with a large surface area to allow them to walk on sand
    • They also have long eye-lashes to stop sand blowing into their eyes
  • 14. How do reptiles survive in the desert?
    • Most reptiles will find some shade under a rock during the hottest part of the day
    • When walking on hot sand a lizard will try to touch the ground with only a small area
    • This lizard keeps swopping feet, and only stands on two feet at a time
    • This snake keeps a loop of itself off the ground as it moves across the sand sideways
  • 15. How do plants survive the desert?
    • A cactus has a long tap root to reach water deep under the ground
    • It has a thick, fleshy stem to store water
    • It has needle-shaped leaves to prevent water loss through the stomata
    • The needles help to stop animals from eating it
  • 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. 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.