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Geologic time pass standards
pass cards related to geoligic time and relative dating
80
Science
8th Grade
04/20/2011

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Cards

Term
eon name that comes from the word hades and means the age of fire or molten rock
Definition
Hadean eon
Term
eon name of very early life that contained primitive life called stromatolites
Definition
Archean eon
Term
Eon known for "jelly like bodies" that did not leave fossil evidence
Definition
Protereozoic eon
Term
Eon since the Cambrian period
Definition
Phanerozoic eon
Term
period of first fossils called trilobites
Definition
cambrian
Term
period of many marine invertebrates like shellfish or mussels
Definition
ordovician
Term
period of first land plants
Definition
silurian
Term
period of age of fish
Definition
Devonian
Term
period of first amphibians
Definition
mississippian
Term
period of coal beds
Definition
pennsylvanian
Term
combined name for mississippian and pennsylvanian periods
Definition
carboniferous
Term
period of Pangea and the massive die off extinction of amphibians
Definition
Permian
Term
period of early dinosaurs the size of dogs and chickens that hunted in packs
Definition
Triassic
Term
period when dinosaurs were dominant
Definition
Jurassic
Term
period of massive die off of dinosaurs
Definition
Cretaceous
Term
epoch of the early horse eohippus or messohippus
Definition
paleocene
Term
epoch of first mammals
Definition
Eocene
Term
epoch of age of birds
Definition
Oligocene
Term
epoch of grasslands dominant
Definition
Miocene
Term
epoch of early man
Definition
Pliocene
Term
epoch of ice age
Definition
Pleistocene
Term
epoch that encompasses now today
Definition
Holocene
Term
in a series of rock layers the oldest rocks are found ......
Definition
on bottom
Term
in a series of rocks with an igenous intrusion in it the horizontal layers are ______ than the intrusion
Definition
older
Term
a gap in the rock fossil record caused by uplift and later erosion causing a jagged surface between rock layers
Definition
unconformity
Term
rock layers are dated and correlated by using
Definition
fossils or index fossils
Term
a fossil that is found over a wide geographic area but during only one time period is called an
Definition
index fossil
Term
place these organisms in the supposed order that they would have occurred mammoth,fish, dinosaur, amphibian,man
Definition
fish, amphibian, dinosaur, mammoth , man
Term
why were there no fossils prior to the cambrian period of the Paleozoic
Definition
all organisms probably had jelly like bodies
Term
the amount of time that it takes for a radioactive substance to lose half of its mass in radioactive decay to some new element
Definition
half life
Term
the supposed age of the earth
Definition
4.5 billion years
Term
a horizontal igneous melt between rocks
Definition
sill
Term
a vertical igneous melt between rocks
Definition
dike
Term
a rock that cools off slowly inside the earth
Definition
intrusive igenous rock
Term
a rock that cools off rapidly outside the earth with small or no crystals
Definition
extrusive igneous rock
Term
the half life of Carbon 12
Definition
5,730 years
Term
why is carbon 12 no good after about 50,000 yrs
Definition
it is all gone and turned into a stable element C14 or N
Term
what type of rock contains fossils
Definition
sedimentary
Term
put this sequence in order tilted by earthquake, horizontal layering under water, folding of horizontal layers, erosion causing an unconformity, deposition by water
Definition
deposition by water, horizonal layers, folding of layers, tilting of layers by earthquake, erosion
Term
means terrible lizard
Definition
dinosaur
Term
ancestor to the modern horse
Definition
eohippus or mesohippus
Term
original supercontinent of the Paleozoic period
Definition
Pangea
Term
Pangea broke up into these two parts
Definition
Laurasia in the Northern hemisphere and Gondwanaland in the Southern hemisphere
Term
a crack in rock layers along which movement occurs
Definition
fault
Term
an unconformity formed between two parallel sedimentary layers of rock
Definition
disconformity
Term
an unconformity formed when parallel sedimentary beds overlay an igneous layer
Definition
nonconformity
Term
an unconformity formed when a parallel series over lays a tilted series of rock
Definition
angular unconformity
Term
a fossil found for a short time over a wide geographic area
Definition
index fossil
Term
structures on several different animals of differing species that suggest they may have had a common ancestor
Definition
homologous structures
Term
The amount of time it takes a radioactive element to loose half of its atoms
Definition
half-life
Term
the half life of U-238
Definition
4.5 billion years
Term
the half life of Carbon 12
Definition
5,730 years
Term
If I had 100 atoms of carbon 12 and its half life is 5,730 yrs, how many atoms would be left in 17,190 yrs?
Definition
12.5 atoms it goes from 100-50 in the first half life............then 50-25 in the second half life.....then 25- 12.5 in the third half life.

17,190/5730 = 3 half lives or 12.5 atoms left
Term
if a fossil is found in several different horizontal layers is it a good index fossil
Definition
no an index fossil is found in only one layer
Term
3 eons included in the precambrian time period
Definition
Hadean, Archean, and Proterozoic
Term
Era of the dinosaur
Definition
Mesozoic
Term
Era of the amphibian
Definition
Paleozoic
Term
Era of the mammal
Definition
Cenozoic
Term
Period when the dinosaur became extinct
Definition
Cretaceous
Term
Biggest theory about what killed the dinosaur
Definition
Asteroid impact............left layers of the element iridium that is not very well spread normally on Earth
Term
Why no precambrian fossils?
Definition
jelly-like bodies
Term
Epoch of major grasslands
Definition
Miocene
Term
Epoch where birds were dominant
Definition
Olligocene
Term
Epoch of the early horse eohippus
Definition
Paleocene
Term
Period of the cenozoic made of Paleocene, Eocene, and Oligocene epochs
Definition
Tertiary
Term
Period of the Cenozoic beginning with the Miocene up until now
Definition
Quarternary
Term
Fossil common in Cambrian period rocks
Definition
trilobite
Term
Fossils common in Ordovician rocks
Definition
invertebrates and brachiopod shells
Term
First land plants were in what period
Definition
Silurian
Term
Age of fish
Definition
Devonian
Term
Age of coal
Definition
Pennsylvanian
Term
Age of first amphibians and limestone deposits
Definition
Mississippian
Term
Name for the combination of the mississippian and pennsylvanian periods together
Definition
Carboniferous
Term
Eon we now live in
Definition
Phanerozoic
Term
geologic law that says oldest layers are found under younger layers
Definition
law of superposition
Term
geologic law that states that an igneous intrusion or dike is younger than any layer it cuts across
Definition
law of cross-cutting
Term
geologic law that states that sedimentary rock beds are normally flat and level
Definition
law of original horozontality
Term
geologic law that says that animal types generally change over time from simple to complex
Definition
law of faunal succession
Term
geologic law used to find missing layers when comparing many rock columns from different parts of the world
Definition
fossil correlation
Term
type of rock all fossils are found in
Definition
sedimentary
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