Select the natural materials:

• Glass and plastic

• Wood and cotton

• Plastic and rock

Wood is a natural material that comes from:

• Siliceous sand

• Petroleum

• Trees

With glass you can make:

• Bottles and glasses

• Bracelets and bags

• Trousers and shoes

Glass is:

• Natural and opaque

• Natural and trasparent

• Man-made and trasparent

You sue cotton to make:

• Clothes

• Doors and windows

• Bags

Cotton comes from:

• Petroleum

• A plant

• Stone crushing

Metals are materials that come from:

• Wood bark

• Some minerals

• Quartzite

Metals are:

• Electrical but not thermal conductors

• Thermal but not electrical conductors

• Are both thermal and electrical conductors

Plastic is:

• A very old material

• A cheap and modern material

• A natural material that you extract form the roots of some plants

Plastic comes from:

• Rocks

• The cellulose you find in plants

• Petroleum processing