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growing crystals!

Discussion in 'Primary' started by moggycat, Jan 5, 2011.

  1. moggycat

    moggycat New commenter

    Next week my year sixes are growing crystals. I have searched the internet for simple explanations, examples etc of crystals with no such luck just complicated explanations! Anyone got a clear but simple definition to what they are or can recommend any good websites? pretty please?
  2. moggycat

    moggycat New commenter

    Anyone??? Please?
  3. You need to dissolve different materials in water in a petri dish or similar and then let the water evaporate. When the materials re-form they do so in a different formation (looking like crystals) each material makes a different formation when it reforms and you can look at them using a hand lens. I think I use salt, sugar, alum, can't remember what else. Hope this is what you are looking for and is of some use.
    Sugar x
  4. moggycat

    moggycat New commenter

    That is helpful thanks, Kind of need a simple explanation of what crystals are though.
  5. moggycat

    moggycat New commenter

    Please guys, feel' desperate!
  6. nomad

    nomad Star commenter

    Crystals are solids that form by a regular repeated pattern of molecules connecting together. In some solids, the arrangements of the building blocks (atoms and molecules) can be random or very different throughout the material. In crystals, however, a collections of atoms called the Unit Cell is repeated in exactly the same arrangement over and over throughout the entire material.
  7. forestje

    forestje New commenter

    Google alum crystals.Hope this helps.

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