3º EP Ciencias Naturales.

Hoy hemos repasado algunos puntos de la unidad 5 (tipos de materia, cambios de estado, materiales y propiedades de los materiales)

Types of matter (pág.81)

-             Pure substance: 1 compound.

-             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)

-             Melting: solid changes to liquid.

-             Evaporation: liquid changes to gas.

-             Solidification: liquid changes to solid.

-             Condensation: gas changes to liquid.

Materials: (pág.84)

-             Natural materials: they come from living things.

·     Animal origin: leather, silk, wool.

·     Plant origin: wood, cork, cotton.

·     Mineral origin: iron, marble, clay.

-             Artificial materials: they are created by transforming natural

materials into different things. Examples: paper, plastic.

Properties of materials (pág.85)

-             conduct heat: conducen calor.

-             impermeable: impermeables.

-             strong: fuertes.

-             flexible: flexibles.

-             transparent: transparentes.

-    elastic: elásticos.