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.
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JC Science
Answer
JC ScienceGases, 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