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Products from Raw Materials

Products from Raw Materials

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Products from Raw Materials

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  1. Products from Raw Materials

  2. Suspension A mixture in which particles of a material are dispersed through- out a liquid or gas but are large enough that they settle out. Particles are insoluble, so they DO NOT dissolve in the liquid or gas. Particles can be separated using a filter. Examples: Salad dressing Medicines that say “shake well before use”

  3. Colloids A mixture in which the particles are dispersed throughout but are not heavy enough to settle out. Made up of solids, liquids and gases. Examples : Mayonnaise Stick deodorant milk

  4. Mixing Pure Substances • Pure substances can be mixed together to form solutions that are liquid, gas or solid. • Most metals we use are combinations of two or more metals mixed together.

  5. Alloys • An alloy is a homogeneous mixture of metal with other substances. • Alloys allow scientists to design metals that have specific properties depending on what they are used for.

  6. Metals • http://www.brainpop.com/science/matterandchemistry/metals/preview.weml

  7. How an Alloy is Made • Steel is formed in a process that takes iron from iron ore and carbon from coal. • Small amounts of other metals are mixed in to give the metal specific properties.

  8. Uses of Alloys • Thousands of years ago civilizations melted tin into copper to create a new substance called bronze. • Bronze was used to create jewellery, armour, tools and weapons.

  9. Modern Alloys • Metallurgists (people who study metals) have created many different alloys, each having its own specific properties. • Aluminum is lightweight and used in alloys to make engines, airplanes and bicycle frames.

  10. http://www.ndep.us/Making-Metal

  11. Text Book Questions • Page 43 • 1 • 2 a, b • 3 • 4