Materials used in technology

1. 1. What is a raw material?

• Raw materials are substances that are extracted directly from nature

• Materials are processing substances

• Raw material is any object created by the human being.

2. 2. A technological object is ...

• a substance extracted directly from nature

• the result of transformation of raw materials

• Any object created by the human being to satisfy their needs

3. 3. The ability of a material to change its shape when we apply forces to it, and to recover its original shape when the forces stop is ....

• Plasticity

• Hardness

• Elasticity

4. 4. It allows a material to be spread into sheets or films.

• Hardness

• Malleability

• Ductility

5. 5. It allows a material to be formed into filaments or wires.

• Ductility

• Malleability

• Elasticity

6. 6. Hardness is ...

• ... when a material breaks easily

• ...is the resistance to breaking that a material shows when it is hit by someting

• ... the capacity to scratch other materials

7. 7. Toughness is ...

• ... the ability to scratch other materials

• ... is the resistance to breaking that a material shows when it is hit by something

• ... when a material breaks easily

8. 8. An electrical conductor is ...

• ... a material conducts electricity

• ... a material doesn´t conduct electricty

9. 9. An electrical insulator is a material that ...

• ...conducts electricty

• doesn´t conduct electricity

10. 10. This is a raw material that comes from the trunks of trees.

• Plastic

• Metals

• Wood