Show:
Technical Materials
Mechanical Properties
Physical Properties
Wood
Metals
100

Raw materials are obtained directly from _______.

Nature

100

Materials can be _____ if they are difficult to scratch, like diamond. 

Hard

100

Electrical conductors allow ______ to flow through them. 

Electricity

100

There are different types of wood because there are many different types of trees that it is obtained from. What are the 2 types they are divided into? 

Hardwoods and softwoods. 

100

Metals that contain mainly iron, whether pure or alloyed with carbon, are called _____ metals.

Ferrous. 

200

Technical materials can be both _____ and _______.

Natural and processed

200

Materials can be _____ if they return to their original form when we stop stretching them, such as a rubber band. 

Elastic

200

Thermal conductors allow ___ to pass through them. 

Heat

200

Wood is an insulator of ____ and ____. 

Heat and electricity. 

200

Is steel considered ferrous or non-ferrous?

Yes, it is made mainly from iron. 

300

Name 2 types of wood materials. 

  • Natural: pine, beech, oak, cherry, ebony, etc.
  • Wood products (or wood derivatives): plywood, chipboard, paper, cork, cardboard, etc.
300

Materials can be _____ if they scratch easily, such as modeling clay. 

Soft

300

Electrical insulators such as ______ do not let electricity flow through them.

Plastic

300

______ is obtained by forming a paste out of wood and plant fibres. This material is not very sturdy and rips easily, but it is easy to cut, paste and fold.

Paper

300

Metals are hard materials and good conductors of heat, electricity and sound. They expand and _____ with temperature.

Contract. 

400

Name 3 types of textile materials. 

  • Natural: wool, silk, cotton, hemp, linen, etc.
  • Processed materials: lycra, nylon, viscose, polyester, etc.
400

Materials can be _____ if they cannot withstand impact, such as glass. 

Brittle

400

What is an example of a sound conductor?

hard solids such as glass or diamond, metals (aluminum, steel, iron, gold, silver), and liquids like seawater

400

_______ is made by compressing several layers of paper while it is wet to thicken it and produce a heavier texture.

Cardboard. 

400

Metals that do not have iron in their composition are called ___-______ metals.

Non-ferrous. 
500

What are the 5 technical materials?

  • Woods
  • Metals
  • Plastics
  • Textiles
  • Construction materials
500

Materials can be _____ if they can be easily shaped into threads or wire, such as nylon. 

Ductile

500

What are 2 examples of thermal insulators?

wood, cork, rubber, and fabrics like wool or cotton. 

500

What is one of the major problems with using wood incorrectly?

(Hint: environmental impact)

Deforestation or pollution. 

500

What are 3 examples of non-ferrous metals?

Copper, tin, aluminum, zinc, titanium, gold, silver, nickel.