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La materia dal latino MATER = madre Tutto ciò che ci circonda e che agisce sui  nostri sensi MODELLO DI  ATOMO MODELLI DI MOLECOLE H 2 O O 2
GLI STATI DELLA MATERIA STATO SOLIDO Forma e volume propri Molecole legate da forze di coesione forti. Le molecole possono compiere piccole oscillazioni ma non  possono allontanarsi
STATO LIQUIDO I liquidi hanno volume proprio ma assumono la forma del recipiente che li contiene. Le forze di coesione sono deboli e le molecole possono scivolare le une sulle altre
STATO GASSOSO I gas e i vapori non hanno nè forma nè volume propri. Le molecole sono disposte in modo disordinato e le forze di coesione sono quasi del tutto inesistenti.
GLI STATI DELLA MATERIA + calore + calore + calore - calore -calore - calore
PROPRIETA' DELLA MATERIA Impenetrabilità:  due corpi non possono occupare  contemporaneamente lo stesso spazio. Comprimibilità:  capacità di alcuni corpi di diminuire il proprio  volume quando vengono schiacciati. Elasticità: capacità dei corpi di riprendere la forma primitiva dopo  aver subito una  deformazione.  Porosità:  proprietà di alcuni solidi la cui struttura presenta spazi  microscopici. Diffusione:  le molecole dei liquidi e dei gas tendono ad occupare  tutto lo spazio a disposizione. I solidi diffondono solo in particolari  condizioni Peso specifico e densità  Gira pagina
PESO SPECIFICO Pesa di più un chilogrammo di ferro o un chilogrammo di paglia? RISPOSTA hanno lo stesso peso! (1  Kg) ma.... volume  diverso!! 1 Kg di ferro 1 Kg di paglia
Volume: 8 cm 3 peso specifico dell'oro = 19,3 g/cm 3 Peso: 1 cm 3 2 cm 3 4 cm 3
LEGNO FERRO ORO GHIACCIO ps=0,7 ps = 7,8 ps=19,3 ps =0,9 Volume = 5 cm 3 Peso =

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La Materia

  • 1. La materia dal latino MATER = madre Tutto ciò che ci circonda e che agisce sui nostri sensi MODELLO DI ATOMO MODELLI DI MOLECOLE H 2 O O 2
  • 2. GLI STATI DELLA MATERIA STATO SOLIDO Forma e volume propri Molecole legate da forze di coesione forti. Le molecole possono compiere piccole oscillazioni ma non possono allontanarsi
  • 3. STATO LIQUIDO I liquidi hanno volume proprio ma assumono la forma del recipiente che li contiene. Le forze di coesione sono deboli e le molecole possono scivolare le une sulle altre
  • 4. STATO GASSOSO I gas e i vapori non hanno nè forma nè volume propri. Le molecole sono disposte in modo disordinato e le forze di coesione sono quasi del tutto inesistenti.
  • 5. GLI STATI DELLA MATERIA + calore + calore + calore - calore -calore - calore
  • 6. PROPRIETA' DELLA MATERIA Impenetrabilità: due corpi non possono occupare contemporaneamente lo stesso spazio. Comprimibilità: capacità di alcuni corpi di diminuire il proprio volume quando vengono schiacciati. Elasticità: capacità dei corpi di riprendere la forma primitiva dopo aver subito una deformazione. Porosità: proprietà di alcuni solidi la cui struttura presenta spazi microscopici. Diffusione: le molecole dei liquidi e dei gas tendono ad occupare tutto lo spazio a disposizione. I solidi diffondono solo in particolari condizioni Peso specifico e densità Gira pagina
  • 7. PESO SPECIFICO Pesa di più un chilogrammo di ferro o un chilogrammo di paglia? RISPOSTA hanno lo stesso peso! (1 Kg) ma.... volume diverso!! 1 Kg di ferro 1 Kg di paglia
  • 8. Volume: 8 cm 3 peso specifico dell'oro = 19,3 g/cm 3 Peso: 1 cm 3 2 cm 3 4 cm 3
  • 9. LEGNO FERRO ORO GHIACCIO ps=0,7 ps = 7,8 ps=19,3 ps =0,9 Volume = 5 cm 3 Peso =