science

By javarn
  • 12,000 BCE

    Sun Drying

    using the sun to dry out food to get rid of the moisture to stop bacteria from growing
  • 500 BCE

    jam

    they used jam to preserve fruits

  • refrigeration

    using the colder temperatures puts the harmful bacteiria into a some what "sleep"

  • canning

    using the canning method stops any sunlight from entering keeping the enviroment cool and dark

  • dehydration

    very similar to sun drying but completely eradicating all moisture

  • vacuum packaging

    depriving your food of oxygen preventing the bacteria from growing

  • chemical preservatives

    being sprayed with chemicals creating a environment difficult for bactieria to grow