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vocab
fossil formation
age-dating
evtinctions and evoulution
random
100
what is the definition of fossil record?
is made up of all the fossils ever discoved on earth
100
what can become fossils of a dead animal?
tissues
100
how does relative age dating helps scientists
relative age dating helps scientists determine the relative order in which species have apperead on earth over time
100
what is the definition of extinction?
occurs when the last individual orginism of species dies
100
what happens after a orginism dies?
its body could be buried under mud , sand , or other sediments
200
what is the definition of mold?
the impression of an orginismin a rock
200
what can osft tissues of animals also become
fossils , the fossils are even more rare
200
how do scientists use relative age daing?
scientists determine the relative order in which rock layers were deposited
200
what does the fossil record contain?
it contains evidence that five mass extinction events have occured during the phanerozonic
200
what happens in carbonization?
a fossil forms when a dead orginim is compressed over time and pressure drivers
300
what is the definition of cast?
a fossil copy of a orginism
300
what kind of dead parts of a animal turn into fossils?
bones , shells , and theeth
300
what is the difference between relative age dating and absolute age dating?
absolute age dating is more precise than relative age dating
300
what is the definition of biological evolution?
is the change over time in populations of related related orginism
300
How old is earth's oldest fossils?
3.4 billion years old
400
what is the definition of trace fossil?
the perseved evidenceof the activity of a orginism
400
what are different ways fossils can form?
mineralization , carbonization , molds and casts and trace fossils
400
what do scientists do in radioactive decay?
scientists look at unstable istotopes in rocks change into stable istotopes over time
400
what are the different types of horse fossils?
equus , pliohippus , merychippus , mesohippus , and hyracotherium
400
what is the definition of trace fosil
the preserved evidence of the activity of an orginism
500
what is the definition of geolic time scale?
a chart that divides earths history into different time units
500
when do fossils break down?
in rare conditions
500
where does ingeous rock come from?
a valcanic magma
500
which is the preserved evidence of the activity of an organism?
trace fossil