meteoritex Flashcards

1
Q

which meteorites are differentiated (anchondrites)?

A

irons, stones & stony irons

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2
Q

which meteroties are undifferentiated (Primitive) (chondrites)

A

chondrites & carbonaceous chondrites

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3
Q

what is the comp of an iron meteroite

A

alloy iron and nickel

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4
Q

what do iron meteorites tell us about the comp of earths layers

A

represent core of a small planet

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5
Q

what % of meteorites are iron

A

6%

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6
Q

what is the comp of stone meteorites

A

silicate minerals: olivine, pyroxene, plagiclase

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7
Q

what do stone meteorites tell us about comp of earths layers

A

mantle of small planet like object

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8
Q

what % of meteorites are stony

A

93%

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9
Q

what is the comp of stony irons

A

roughly equal proportions of iron nickel alloy and silicate minerals (olivine plagioclase pyroxene)

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10
Q

how many meteorites are stony iron

A

2%

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11
Q

what is a meteorite

A

samples from the solar system which represent stages in earths accretion history

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12
Q

anchondrite?

A

meteorite which formed from an asteroid which have eveolved and melted

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13
Q

chondrite?

A

meteorite which has not been melted

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14
Q

what is the comp of a chondrite meteorite

A

olivine, pyroxene and plagioclase

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15
Q

what do chondrite meteorites tell us about comp of eath layers

A

represent original condensed droplets of the nebular material from which the solar system formed

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16
Q

carbonaceous chodrites comp

A

water and organic compounds

17
Q

what do carbonaceous chondirte meteorites tell us about comp of earths layers

A

similar to sun but fewer volatiles

18
Q

where do you find the denser materials?

A

closer to the core

19
Q

where do meterorites come from

A

asteroid belt

20
Q

what is the meterorite allende important?

A

largest carbonaceous chondrite found on earth

21
Q

what is a chondrule

A

(chondrite) condensed droplet of nebular material from which solar system evolved

22
Q

how are martian meteorites found on earth?

A

ejected from mars by impact of asteroid or comet