Obair an Seandálaí Flashcards

1
Q

Cad é seandálaithe?

A

Daoine a dhéanann tocailt ar an talamh chun teacht ar fhoinsí

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2
Q

Cad é déantáin?

A

Aon rud faighte atá lámhdhéanta

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3
Q

Na ceithre chéim tocailte?

A
  1. Déantar suirbhe ar an láthar
  2. Roinnt an láthar le m^2
  3. Baintear an barrithir
  4. Úsáidtear as uirlísí chun tocailte
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4
Q

3 slí a chuireann siad aois le na déantáin?

A
  1. Stratagrafaíocht
  2. Dátú charbóin
  3. Deindreachroineolaíocht
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5
Q

Mínigh stratagrafaíocht?

A

Aoisiú bunaithe ar cé doimhin a bhfuil sé sa talamh

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6
Q

Cén fáth gur oibríonn stratagrafaíocht?

A

Bíonn sraith ithir déanta tar éis talamh fada (1000 bliain le haghaidh 1cm ithir)

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7
Q

Mínigh dátú carbóin?

A

Dátú ar an méid charbóin-14 fágtha in orgáin beo

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8
Q

Cén fáth gur oibríonn dátú carbóin?

A

Laghdaíonn an méid carbóin-14 i órgánaigh go rialta (50% gach 5,730 bliain)

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9
Q

Mínigh deineachroineolaíocht?

A

Fásann fáinne ar chrann gach bliain. Comhaireann muid na fáinne chun fháil an aois

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