Ch. 9: Metamorphosis

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Ch. 9 Metamorphosis

• Vocabulary
• Life cycle, reproduction, metamorphosis, complete
  metamorphosis, larva, pupa, incomplete
  metamorphosis, nymph

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Animal Life Cycles

• No animal is born as an adult.
• All animals go through different stages in their
  lives, before they become adults.
• This process is called a lifecycle.
• Lifecycles begin with birth, or hatching, and end
  in the death of the animal.
• When an animal reproduces, the life cycle starts
  all over again with the new animal.
• Generally, most animals stay the same shape from
  birth to young to adult.
• Mammals, fish, reptiles, and birds all develop
  this way.

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Complete Metamorphosis

• Some animals, like amphibians and insects, do not
  look the same as babies as they do as adults.
• They have what is called a larva stage.
• Larva are the baby form of an animal that looks
  different for the adult.
• Insects go through even one more stage, the pupa.
• A pupa is a cocoon that insects wrap themselves
  in in order to change completely from larva to
  adults.

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Complete Metamorphosis
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Incomplete Metamorphosis

• Some insects do not go through a complete
  metamorphosis.
• The larva they produce sort of look like the
  adult they will become, but are missing a few
  body parts (like wings.)
• Larva in an incomplete metamorphosis are called
  nymphs.
• Animals that go through incomplete metamorphosis
  do not enter a pupa stage.
• They grow the new body parts under their old skin
  and then shed their skins when they grow bigger.
• They will usually stop shedding their skin when
  they become an adult.

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Incomplete Metamorphosis
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Animal Life Cycles

• For larger versions of the pages located in this
  power point presentation go to
• http//www.kidzone.ws/animals/lifecycle.htm

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Questions About Chapter 9

1. Name two types of animals that go through a
   complete metamorphosis.
2. What types of animals go through an incomplete
   metamorphosis?
3. What is the second stage in the life cycle of a
   butterfly?
4. What is the second stage in the life cycle of a
   dragonfly?