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15
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How do bones change when they become fossils?
bone material changes shape
bones become lighter and weaker
bone material is replaced by rock (minerals)
bone becomes stronger and harder
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banana
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gift
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fairy
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baam
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15
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The oldest fossils are usually found
on ocean beaches.
floating in rivers.
deep underground.
on top of mountains.
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seesaw
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rocket
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thief
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If a scientist finds fossilized trees in what is now a desert area, the fossils are evidence that the
climate there has not changed much.
area used to home to small animals.
climate there was once rainy.
area used to have no carnivores.
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15
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An insect in amber is an example of
an exposed fossil.
a trace fossil.
a fossil record.
a whole body fossil.
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Almost all fossils are found in ________
sedimentary rocks.
dirt that has been packed down.
groundwater.
amber.
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A _________ is an example of a trace fossil.
fossilized footprint
fossilized tooth
petrified tree
piece of amber
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What must happen for a fossil to form?
it is in deep water
it is left unburied
it is buried quickly
it is kept dry
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What is a fossil record?
evidence that animals lived a long time ago
the history of how life on Earth has changed
the rock left behind after a bone is fossilized
a record of an organism left behind.
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Which is a step in the process of how animals become fossils?
Sediment covers an animal's remains.
Most of the animal rots away, leaving only the skin.
The soft parts of an animal turn to rock.
An animal dies high up on a mountain.
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fairy
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baam
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How are fossils revealed?
water washes dirt away
wind weathers away rock
people dig up soil
all of these
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banana
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seesaw
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fairy
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banana
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Which of the following can become a fossil?
a large animal
an insect trapped in sap
a plantโs leaves
all of these.
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The history of how life has changed on Earth over millions of years is revealed by
the fossil record.
animals living today.
bones in the desert.
history books.
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