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Fred Midterm

Science Midterm

QuestionAnswer
method that dates rocks older than 100,000 years old potasium argon method
unstable isotopes radioactive
the process of figuring out how old an object is absolute dating
the most common method of absolute dating radiometric
the process in which radioactive isotopes break dow ninto stable isotopes radioactive decay
process in which minerals replace tissue mineral replacement
mark or cavity mold
fossil from a specific time period index fossil
fossil formed by animal movement trace fossil
mold filled with sediment cast
A silicate mineral must contain silicon and oxygen
what is a mineral deposit that is lrge and pure enough to be mined called. ore
The way a mineral breaks down is determined by the arrangement of its what? atoms
open pits and quarries are types of surface mines
When you say that an object is shiny or dull you are describing it's what? luster
A repeating pattern of atoms, ions, or molecules ina mineral is called? crystalline structure
The potenially harmful effects of mining can be reduced by reclamation of the land
What is the softest mineral on the Mohs' scale? talc
How are rocks layered on the geologic column? oldest rocks are on the bottom
What is a fault? a break in the Earth's crust
Whatis the most common type of unconformity? a disconformity
What is an example of mineral replacement? Petrified wood.
Which era ended with the largest mass extinction in Earth's history? Paleozoic
What happens during radioactive decay? Radioactive isotopes break down into stable isotopes of other elements
How do geologists use the geologic time scale? to divide Earth's history into manageable parts
method that dates rocks older than 100,000 years old potassium-argon method
unstable isotopes radioactive
the process of figuring out how old an object is absolute dating
the most common method of absolute dating radioactive dating
the time it takes for one-half of a radioactive sample to decay half life
the process in which radioactive isotopes break down into stable isotopes radioactive decay
isotopes atoms with the same number of protons but a different number of neutrons
Which two methods of radiometric dating are used for rocks more than 10 million ears old? rubiium-strontium and uranium-lead
process in which minerals replace tissues mineral replacement
preserved remains or other evidence of an organism fossil
mark or cavity mold
fossil from a specif time period index fossil
fossil formed by an animal's movements trace fossil
mold filled with sediment cast
what is Amber? hardened tree sap
which of the following is an example of mineral replacement preserved footprints
which kind of tempuratures will slow down an organism's decay? freezing temperatures
largest division of geologic time eon
unit of geologic time that includes two or more periods era
third largest division of geologic time period
fourth largest division of geologic time epoch
death of a species extinction
standard method that divides Earth's history into parts geologic time scale
which era ended wtih the largest mass extinction in Earth's Paleozoic
During which era did birds and small mammals begin to evolve? Mesozoic
What does the rock and fossil record represent geologic time
Which era are we in now Cenozoic
Erosion is one ofthe major causes of them missing rock layers, known as.... uncomformities
To determine the most accurate and precise age of the Earth's oldest rocks, geologists wouls use the carbon-14 method
Which of the following do geologist use to date rock layers index fossils
how many years of the history of Earth do geologists study 4.6 billion years
the phrase 'youndger over older' could be used to remember the principle of? superposition
Which word best describes the geologic column ideal
What happens during radioactive decay radioactive isotopes break down into stable isotopes of other elements
what can animal tracks tell about the animal that left them how big it was.
what process compares one rock layer with the others in a sequence relative dating
give an example of a trace fossil mark left by a dinosaur's tail
a missing layer of rock disconformity
the process of wearing down erosion
mold filled with sediment cast
the idea that geologic precesses occuring now are the same as those in the past uniformitarianism
the study of past life palentology
a science that combines uniformitarianism and catastrophism modern geology
where are most fossils preserved in sedimentary rock
how old would rock surronding a Tropites fossil be? about 210 million years old
a break in the Earth's crust fault
rock layers bent by the Earth's internal forces folding
molten rock that has squeezed into existing rock and hardened intrusion
rock layers slanted by Earth's internal forces tilting
Carbonites are used to make? batteries
two major groups of minerals silicates and nonsilicates
a silicate mineral must contain silicon and oxygen
what is formed in nature, inorganic, and has a crystalline structure mineral
A mineral that is composed of only one element natice element
used to make fireworks sulfides
the ratio of mass of a substance to the volume of the substance density
Magma body that moves upward a nd cools before it reaches the surface, forming crystals pluton
used to make toothpaste sulfates
Where minerals form when rocks are altered by changes in pressure, temperature or chemical makeup metamorphic rock
a mineral that has a shiny surface, does not let light pass through, and is a good conductor of heat and electricity metallic mineral
The removal of minerals that are located at or near the surface of the Earth Surface mining
The process of returning land to its original condition after mining reclamation
A mineral deposit large enough and pure enough to be mined for profit ore
Forms in metamorphic rock garnet
Forms in tear shaped pegamatites in hot fluid topaz
forms when a body of salt water evaporates gypsum
forms from slowly cooled magma that solidifies into a pluton feldspar
examples are copper and gold native elements
Created by: pritch20
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