This document discusses common materials including metal, plastic, glass, wood, fabric, and paper. It describes their natural or manufactured origins and properties like hardness, flexibility, transparency, and reactions to factors like heat, water, air, and cold. The key information provided is classifications of common materials, their basic physical properties, and how they can be affected by external conditions.

1. Materials and properties

2.  - Metal
 - Plastic
 - Glass
 - Wood
 - Fabric
 - Paper

3. NATURAL MANUFACTURED

4.  - hard
 - smooth
 - bendy
 - shiny
 - transparent
 - soft
 - rough
 - rigid
 - dull
 - opaque

5.  When we bend, stretch or squeeze materials
they can:
 Stay in the new shape
 Go back to the old shape
 Don´t change

6. - Heat melts
- Water and air: Rust
- Cold freezes

7. Glass Paper Plastic