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Fossils

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  • What must happen for a fossil to form?
    it is left unburied
    it is buried quickly
    it is in deep water
    it is kept dry
  • Which of the following can become a fossil?
    all of these.
    an insect trapped in sap
    a plant’s leaves
    a large animal
  • Which is a step in the process of how animals become fossils?
    An animal dies high up on a mountain.
    Most of the animal rots away, leaving only the skin.
    The soft parts of an animal turn to rock.
    Sediment covers an animal's remains.
  • The oldest fossils are usually found
    floating in rivers.
    deep underground.
    on ocean beaches.
    on top of mountains.
  • How are fossils revealed?
    people dig up soil
    water washes dirt away
    all of these
    wind weathers away rock
  • A _________ is an example of a trace fossil.
    fossilized tooth
    piece of amber
    petrified tree
    fossilized footprint
  • Almost all fossils are found in ________
    amber.
    groundwater.
    sedimentary rocks.
    dirt that has been packed down.
  • If a scientist finds fossilized trees in what is now a desert area, the fossils are evidence that the
    area used to home to small animals.
    climate there was once rainy.
    climate there has not changed much.
    area used to have no carnivores.
  • The history of how life has changed on Earth over millions of years is revealed by
    animals living today.
    the fossil record.
    bones in the desert.
    history books.
  • An insect in amber is an example of
    an exposed fossil.
    a fossil record.
    a whole body fossil.
    a trace fossil.
  • How do bones change when they become fossils?
    bone material changes shape
    bone material is replaced by rock (minerals)
    bones become lighter and weaker
    bone becomes stronger and harder
  • What is a fossil record?
    the history of how life on Earth has changed
    a record of an organism left behind.
    the rock left behind after a bone is fossilized
    evidence that animals lived a long time ago
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