Adaptation · Year 2

Every habitat has its challenges: heat or cold, too much water or too little, predators to escape or prey to catch. Living things have features, called adaptations, that suit them to where they live. Adaptations build up over many generations.

Key facts

  • An adaptation is a feature that helps a living thing survive in its habitat.
  • Polar animals: thick fur or feathers and a layer of fat (blubber) keep them warm; white fur hides polar bears and Arctic foxes in the snow.
  • Desert animals: a camel can go for days without drinking, stores fat in its hump, and has wide feet for walking on sand and long eyelashes to keep sand out.
  • Desert plants: a cactus has spines instead of leaves to lose less water, a thick stem that stores water, and roots that spread wide to collect rain.
  • Camouflage helps animals hide from predators or creep up on prey.
  • Predators often have eyes at the front to judge distance; prey animals often have eyes at the sides to see all around.
  • Some adaptations are behaviours: swallows migrate to warmer places, and hedgehogs hibernate through the winter.

Worked examples

Example 1

Give three ways a polar bear is adapted to life in the Arctic.

Answer: thick fur and a layer of fat keep it warm; white fur is camouflage in the snow; big paws spread its weight on snow and ice

Example 2

How is a cactus adapted to life in the desert?

Answer: spines instead of leaves lose less water; a thick stem stores water; wide-spreading roots collect rain quickly

Example 3

A rabbit has eyes on the sides of its head. An owl has eyes at the front. Why?

Answer: the rabbit (prey) sees almost all around to spot predators; the owl (predator) can judge distance to catch its prey

Example 4

A fennec fox lives in the hot desert and has very large ears. An Arctic fox has small ears. Explain why.

Answer: large ears lose heat, which keeps the fennec fox cool; small ears lose less heat, which keeps the Arctic fox warm

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