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