Term
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Definition
| remains or traces of prehistoric life |
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Term
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Definition
Petrified
Replacement
Mold
Cast |
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Term
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Definition
| cavities and pores are filled with precipitated mineral matter |
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Term
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Definition
| cell material is removed and replaced with mineral matter |
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Term
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Definition
| shell or other structure is buried and then dissolved by under ground water |
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Term
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Definition
hollow space of a mold is filled with mineral matter
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Term
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Definition
| organic matter becomes a thin residue of carbon |
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Term
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Definition
| replica of the fossil's surgace preserved in fine-grained sediment |
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Term
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Definition
| hardened resin of ancient trees surrounds an organism |
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Term
| conditions favoring preservation |
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Definition
Rapid burial
Lack of oxygen
Possession of hard parts |
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Term
| Principle of fossil succession |
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Definition
| proposed by William Smith, fossils succeed one another in a definite and determinable order |
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Term
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Definition
widespread geographically and existed for a short range of geologic time
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Term
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Definition
nucleus
protons- positively charged
Neutrons |
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Term
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Definition
| electrons-negative electrical charge |
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Term
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Definition
| an elements identifying number, number of protons in the atoms nucleus |
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Term
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Definition
| number of protons plus the number of neutrons in an atoms nucleus |
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Term
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Definition
| spontaneous breaking apart of atomic material |
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Term
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Definition
| half-life of only 5730 years |
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Term
| true or false- carbon dating is used to dave very recent events |
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Definition
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Term
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Definition
| 4.5 billion to 540 million years ago |
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Term
| what percent of the precambrian era contains earths history |
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Definition
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Term
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Definition
most are buried from view
each continent has a core are of precambrian rocks |
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Term
| do fossil fuels come from precambrian rocks |
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Definition
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Term
| what is the primitive atmosphere formed from |
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Definition
| volcanic gases, a process called outgassing |
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Term
| water vapor condenses and forms what |
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Definition
| primitive oceans as earth cools |
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Term
| plants evolve and photosynthesis produces what |
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Definition
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Term
| does oxygen content in the atmosphere increase or decrease |
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Definition
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Term
| about 4 billion years after earth formed, abundant _______ ______ organisms that require oxygen existed |
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Definition
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Term
| are precambrian fossils abundant? |
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Definition
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Term
| plant fossils date from what period |
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Definition
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Term
| animal fossils date from what period |
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Definition
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Term
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Definition
| 540 million years ago to about 248 million years ago |
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Term
| what period did life forms come with hard parts |
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Definition
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Term
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Definition
| southern continent of gondwanaland exists |
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Term
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Definition
| a barren lowland, seas move inland and recede several times...leaving rock salt and gypsum deposites |
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Term
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Definition
| restricted to seas, vertebrates had not yet evolved |
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Term
| early paleozoic invertebrate groups |
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Definition
trilobites
brachiopods
cephalopods |
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Term
| first organisms with hard arts, such as shells came from what era |
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Definition
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Term
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Definition
| super continent of pangara forms |
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Term
| worlds climate becomes very seasonal causing what |
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Definition
| causing the dramatic extinction of many species |
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Term
| When did that Mesozoic era happen? |
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Definition
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Term
| What was another name for the Mesozoic era? |
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Definition
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Term
| During what era did Pangaea begin to to break up and form the Atlantic Ocean? |
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Definition
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Term
| What was the dominant tree of the mesozoic era? |
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Definition
| Gymnosperms (pines and cedars) |
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Term
| What readily adapted to the dry Mesozoic climate? |
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Definition
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Term
| What was the dominate animal of the mesozoic era |
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Definition
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Term
| What are thought to be the two reasons animals became extinct towards that the end of Mesozoic era? |
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Definition
| asteroid struck the earth and extensive volcanism |
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Term
| When did the Cenozoic era happen? |
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Definition
| 65 million years ago till now |
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Term
| What was another name for the cenozoic era? |
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Definition
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Term
| Were most of the continents above or below sea level during the cenozoic era? |
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Definition
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Term
| Rivers erode and form what during the cenozoic era? |
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Definition
| gorges like the grand canyon |
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Term
| During the cenozoic era what plant dominated the world? |
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Definition
| Angiosperms (flowering plants) |
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Term
| What two groups of mammals evolved at the end of the mesozoic era? |
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Definition
| Marsupials and placentals |
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