Technical materials 2ºESO

Plastics are:

• Good electrical conductors

• Good thermal conductors

• Good acoustic conductors

• Good thermal isolators

Wood is obtained from:

• Trunk trees

• Minerals and rocks

• Quarries

• Living beings degradation

Hardwoods are obtained from:

• Slow grown trees

• Slow powerful trees

• Fast grown trees

• Slow powerful trees

An ecological property of wood is:

• Hard materials

• porous

• recyclable

• Thermal isolators

Which is not a wood derivative

• plywood

• fibreboard

• chipboard

• motherboard

A gauge is

• a carving tool

• a measuring tool

• a drilling tool

• a planing tool

Which of these is not a type of plastic?

• Thermoplastics

• Thermoisolators

• Thermosettings

• Elastomers

Elastomers are characterized by their

• heat conduction

• electricity conduction

• lightness

• Elasticity

Thermosettings can be recycled by heating it again

• true

• False

Thermoplastics are:

• The softer ones

• The heavier ones