Types of matter (pág.81)
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Pure substance: 1 compound.
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Mixture: 2 or more substances.
· heterogeneous: we can see the
different ingredients and separate them.
· homogeneous: we can not see the
different ingredients.
Changes of state (pág.83)
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Melting: solid changes to liquid.
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Evaporation: liquid changes to gas.
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Solidification: liquid changes to solid.
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Condensation: gas changes to liquid.
Materials: (pág.84)
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Natural materials: they come from living things.
· Animal origin:
leather, silk, wool.
· Plant origin: wood,
cork, cotton.
· Mineral origin:
iron, marble, clay.
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Artificial materials: they are created by
transforming natural
materials into different things. Examples: paper,
plastic.
Properties of materials (pág.85)
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conduct heat: conducen calor.
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impermeable: impermeables.
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strong: fuertes.
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flexible: flexibles.
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transparent: transparentes.
- elastic: elásticos.
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