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Adaptation ks4
 

Adaptation ks4

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biology

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    Adaptation ks4 Adaptation ks4 Presentation Transcript

    • POPULATIONS
    • Population size
      • A population is the number of a species living in a particular area
    • 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
    • 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.
    • Adaptation
    • 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
    • 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
    • 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
    • An arctic habitat
      • This sort of habitat can have extremely low temperatures
      • The ground is covered with white snow for most of the year
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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.
    • 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.