Summary
Samenvatting Havo 4/5 - H1 Systeem Aarde - De Geo
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Bevat informatie van H1 Systeem Aarde Opbouw van de aarde, endogene processen, ontstaan van continenten en meer.
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Renashae
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Aardrijkskunde – H1 Systeem AardeRenashae Ugueto
Paragraaf 1
Geologische tijdschaal
Definitie
Indeling van de 4.6 miljard jaren omvattende geologische geschiedenis van de
aarde.
Relatieve tijdschaal
Definitie
De volgorde van de tijdperken was bekend, maar niet in het aantal jaren.
Bepalen dmv sedimentlagen.
Onderste sediment = oudst.
Absolute ouderdomsbepaling
Definitie
Jaartallen koppelen aan de tijdschaal.
Bepalen dmv radioactieve verval van gesteenten.
Opbouw van de aarde
Indeling
Chemische eigenschappen
Aardkern, -mantel, en -korst.
Fysische eigenschappen
Lithosfeer en asthenosfeer.
Aardkern
Mengsel van nikkel en ijzer.
Binnenste gedeelte = vast gesteente
Buitenste gedeelte = +- vloeibaar gesteente
, Aardmantel
Bevatten veel ijzer en magnesium.
Binnenmantel = gedraagt als vast gesteente
Buitenmantel = taai-vloeibaar/plastisch, behalve laatste 40 km.
Aardkorst
Grotendeels verbindingen van zuurstof met ijzer, calcium, magnesium, natrium en
aluminium.
Dikte
Oceanische korst = 7-10 km
Continentale korst = 35-40 km
Lithosfeer
Definitie
Buitenste schil van de aarde.
Bestaat uit
Aardkorst
Continentale en oceanische korst.
Aardmantel
Buitenste, vast gesteente
Dikte = 100-150 km
Graniet
Definitie
Stollingsgesteente (H2 §1) met zichtbare kristallen.
Ontstaan = langzame afkoeling van magma.
Continentale korst
Soortelijke massa = 2.8
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