Topic 8 - Materials Flashcards
What are natural materials?
Natural materials are those derived directly from raw materials.
What are synthetic materials?
Synthetic materials are also called man-made materials. Raw materials are put through a manufacturing process to make a synthetic material.
What are the five major sources of raw materials?
Earth Sea Air Crude oil Living things
Give six examples of natural materials
Cotton Wool Silk Wood Rubber Gold
Give five examples of synthetic materials
Polythene PVC Glass Iron Aluminium
What is nanotechnology?
Nanoscience or nanotechnology uses particles with sizes in the range of 1-100 nm.
What is a nanometre?
A nanometre is a unit of length - it is 10 *-9 m
Why do nanoparticles have different properties to traditional materials?
At this size, the particles have avert large surface area, which gives them different properties to traditional materials.
