
A materia e os materiais
Presentation
•
Science
•
5th - 6th Grade
•
Hard
Isa Rejo
Used 3+ times
FREE Resource
8 Slides • 0 Questions
1
A materia e os materiais
By Isa Rejo
2
É todo aquilo que se pode tocar e ocupa un espazo.
a materia
ÁTOMOS
MOLÉCULAS
SUBSTANCI
Moléculas fabricadas polos seres vivos. Grandes e complexas (proteína, azucres, graxas, ...)
DE QUE ESTÁ FORMADA?
materia orgánica VS INORGÁNICA
Moléculas pequenas e sinxelas (dióxido de carbono, sales minerais, ...)
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densidade, dureza, tenacidade, transparencia, flexibilidade, flotabilidade, impermeabilidade, lixeireza, conductividade térmica ou eléctrica, cor, sabor ou olor.
propiedades específicas
masa
volumen
propiedades xerais
propiedades da materia
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sólido: a materia ten volume e unha forma definida
líquido: a materia ten volume e unha form variable
gasoso: a materia non ten volume e unha forma variable
estados da materia
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6
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pel
la
coiro
seda
orixe animal
madeira
celulosa
algodón
orixe vexetal
mineirais (pedras preciosas, rochas, ...)
petróleo
orixe mineral
os materiais
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plástico
cristal
papel e cartón
aliaxes: aceiro, bronce ou latón (obtense da mestura de matais )
materiais
artificiais
A materia e os materiais
By Isa Rejo
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