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JC Science
JC Science

Iodine is most commonly used in science to test the presence of starch in food. In water, it is an orangish\brown colour but if you put it on a food that contains starch it will turn a darkblue\black colour. For example, if you put it on bread, it will turn darkblue\black.


Flowering plant : Parts and functions

Gases, Liquids and Solids

  • Gases, liquids and solids are al made up of atoms, molecules and/or ions, but the behaviours of these particles differ in the three phases

Particles in a:

  • Gas are well separated with no regular arrangement
    • gas vibrate and move freely at high speeds
  • Liquid are close together with no regular arrangement
    • liquid vibrate, move about, and slide past each other
  • Solid are tightly packed, usually in a regular pattern
    • solid vibrate (jiggle) but generally do not move from place to place

Liquids and solids are often referred to as condensed phases because the particles are very... (More)