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