power point collina
TRANSCRIPT
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Le colline Le colline sono i rilievi più bassi:arrivano fino a circa 600 metri di altezza;si trovano generalmente vicino alle zone montuose e hanno la caratteristica di avere una forma arrotondata e smussata Il loro clima è più caldo rispetto a quello della montagna.In collina l’inverno non è troppo rigido e l’estate non è troppo calda. L’acqua è di solito buona e abbondante.
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Le colline moreniche sono state create dai ghiacciai.
Molti milioni di anni fa i ghiacciai, estendendosi enormemente, raggiunsero il piede delle montagne, trascinando con sé il materiale eroso (detriti) e deposto a valle.
L’accumulo di questi detriti infatti si chiama morena.
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Le colline strutturali sono i resti di antiche montagne erose e consumate dai fenomini atmosferici(pioggia,vento e gelo).
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Le colline tettoniche si sono formate per il corrugamento della crosta terrestre e il sollevamento del fondo marino. Lo possiamo capire dai resti fossili di conchiglie appartenuti appunto ad animali marini che si ritrovano scavando il terreno nelle zone collinari.E’ la stessa origine delle montagne.
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Le colline vulcaniche sono antichi vulcani spenti il cui cratere si è riempito di terra.
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Le parole della collina
ulivi
viti
Alberi da frutta
paesebosco
campi
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Piante del bosco in collina
carpinoabete
ippocastanocipresso
nocciolo
castagno
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Animali in collina
mucche
maialianatre
scoiattoli
Gufi e civette
volpicinghiali
procioni