enFIScience26
Fossils: The Persevered Remains or Traces of Living Things
Sedimentary Rock: The type of rock that is made of hardened sediment
Mold: A fossil formed when an organism is buried in sediment, dissolves leaving a hollow area
Cast: A fossil that is a copy of an organism shape formed when minerals seep into mold
Petrified Fossil: A fossil in which mineral replace all or part of an organism
Carbon Film: A type of fossil consisting of an extremely thin coating of carbon rock
Trace Fossil :A type of fossil that provides evidence of the activities of ancient organisms
Paleontologist : A scientist who studies fossils to learn about organisms that have lived long ago
Scientific Theory : A well tested concept that explains a wide range of observation
Evolution : The process by which all the different kinds of living things that change over time
Extinct : Describes a type of organisms that no longer exist on earth
Relative Age : The age of rock layers
Absolute Age :The age of a rock given as the number of years since the rock formed
Law Of Superposition : The geologic principle that states that in horizontal layers a sedimentary rock, each layer is older that the layer above and younger than the layer
Extrusion : An igneous rock layer formed when lava forms onto earths surface
Intrusion : An igneous rock layer formed when magma hardens beneath earths surface
Fault : A break or crack in earths lithosphere along which rocks have
Uncomformaty : A place where an old, eroded rock surface is in contact with a near rock
Index Fossil : Fossil of widely distributed organisms that lived during only one short period
Radioactive Decay : The Breakdown of a radioactive element releasing particles and energy
Half Life : The length of time needed for half of the atoms of a sample of a radioactive isotope to decay
Geologic Time Scale :A record of the geologic events and life in earths scale
Era :One of the 3 long units of geologic time into which geologist divide eras.
Period : One of the units of geologic time into which geologists divide eras
Continental Drift : The gradual movement of the continents across the earths surface through geological time
Isotopes : An atom with the same number of protons and a different number of neutrons from other atoms of the same element
Mass Extinction : When many types of living things become extinct at the same time
Pursued Remains : Fossils
Radioactive Dating : The process of determining the age of an object using half of one or more radioactive isotopes
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A place where an old, eroded rock surface is in contact with a near rock
A fossil in which mineral replace all or part of an organism
An igneous rock layer formed when lava forms onto earths surface
An igneous rock layer formed when magma hardens beneath earths surface
The age of a rock given as the number of years since the rock formed
Fossil of widely distributed organisms that lived during only one short period
The process by which all the different kinds of living things that change over time
The Persevered Remains or Traces of Living Things
The type of rock that is made of hardened sediment
A scientist who studies fossils to learn about organisms that have lived long ago
Describes a type of organisms that no longer exist on earth
A break or crack in earths lithosphere along which rocks have
The gradual movement of the continents across the earths surface through geological time
A fossil that is a copy of an organism shape formed when minerals seep into mold
The length of time needed for half of the atoms of a sample of a radioactive isotope to decay
The process of determining the age of an object using half of one or more radioactive isotopes
A type of fossil that provides evidence of the activities of ancient organisms
An atom with the same number of protons and a different number of neutrons from other atoms of the same element
When many types of living things become extinct at the same time
One of the 3 long units of geologic time into which geologist divide eras.
A type of fossil consisting of an extremely thin coating of carbon rock
The geologic principle that states that in horizontal layers a sedimentary rock, each layer is older that the layer above and younger than the layer
A well tested concept that explains a wide range of observation
One of the units of geologic time into which geologists divide eras
A fossil formed when an organism is buried in sediment, dissolves leaving a hollow area
The Breakdown of a radioactive element releasing particles and energy