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Formation of Igneous Rocks



1. Problem/Purpose/Question



How do igneous rocks form?

2. Hypothesis



"Room Temperature" will cool slower, but "Low Temperature" will cool faster.

3. Materials:



  • Room Temperature

    • 1 candle
    • 1 spoon
    • paper towels
    • 1 cup with crystals
    • magnifying glasses
    • safety goggles
    • clay ball
  • Low Temperature

    • 1 candle
    • 1 spoon
    • paper towels
    • 1 cup with crystals
    • magnifying glasses
    • clay ball
    • ice cube

4. Procedure


Room Temperature


  1. place a very small amount of salol on to a metal spoon
  2. melt salol by holding the spoon more than an inch above flame
  3. remove spoon from fire
  4. add a little bit of salol
  5. hold up spoon
  6. watch it crystallize, observe

Low Temperature

  1. Melt salol
  2. rest the spoon on ice-cube
  3. watch it crystallize, observe

5. Data/Observations



Room Temperature:

  • small, squared crystals
  • spread out

Low Temperature:


  • clumped together
  • more white than Room Temperature's

6. C.E.R.



Our prediction was right, low temperature cools faster than room temperature. Why? Simply becuase room temperature is much warmer than low temperature. Therefore, the cooler it is, the faster it cools. Our evidence is that during the experiment, we started cooling 2 different spoons at the same time, one with the ice cube and one without the ice cube. The one with the ice cube cooled faster. End of that!