Changes of materials: Contraction and expansion

Paper is a man- made material. Learn how paper is made. Video.

Materials: 2nd grade. Unit 7

Materials- flashcards

Ficha Classify: natural and man- made materials and materiasl from plants and from animals. 

Materials: properties of materials + mass and volume.

Materials change. 

Float or sink?

Cuestionario

Materials: presentación completa

Volume - regular shapes

volumen de cubos, prismas y pirámides

Reversible- irreversible changes in materials

Reversible - irreversible changes; dissolving; separating mixture

Game: dissolving, reversible and irreversible changes;

Material properties

Material properties: opaque, transparent, weak, strong,...

Materials´ properties

Materials´ properties: 

Hardness: An object´s resistance to being scratched.
Tenacity: An object´s resistance to breaking.
Elasticity: An object´s ability to recover its original shape.
Plasticity: An object´s ability to become a new shape.
Stiffness: The amount of force that is needed in order to change the shape of an object.
Density: The relationship between the mass of an object and the volume it occupies.
Colour
Viscosity: An object´s ability to flow.
Waterproof: An object´s ability to repel liquid.
Absorbency: An object´s ability to retain liquid.
Transparency: How well you can see through an object.
Conductivity: An object´s ability to transfer heat or electricity.

Poster sobre los materiales y sus propiedades

Materials

Float or sink?

Game

Float or sink? Properties of materials

Floating and Sinking

Look at the objects listed in the table below.

If you put them in water do you think they would float or sink?  Fill in the table.

Recycle

3R´s Reuse, Reduce and Recycle

Natural materials vs. man-made materials

Natural materials

They are found around us.
We have to take them from the living things or extract them from the ground (Minerals).

Man-made materials

We transform natural materials in many different ways, making them man-made materials. This process changes the properties of materials.

Read through this Power Point Presentation. Then draw a table and classify the material that you have seen as natural or man- made materials.