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SPOILED ROTTEN!

Test if ordinary household items can be used as food preservatives

Suitable For

Grade 6

Difficulty

2

Time Required

 <2 Weeks

Supervision

Required

What’s it about?

Since the ancient times, people have been using a number of natural products such as sugar or salt to preserve their food. Some foods spoil more quickly than others, but food that have been treated with ‘preservatives’ can stay fresh for long periods of time. The use of ‘preservatives’ on food slows down the growth of bacteria, thereby preventing the spoilage of food.

Preservatives can be artificial chemicals developed by scientists, but many natural preservatives can also be found in your kitchen as can be seen in the following science experiment:

Topics covered

Preservatives, Osmosis

What will I need?

  • 6x GLASS JARS
  • APPLE
  • MAGIC MARKER
  • SALT
  • SUGAR
  • VINEGAR
  • ROSEMARY

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

Please view the full explanation how Salt, Sugar, Vinegar, Rosemary Extract & Water can be used as a food preservative in the e-book version of this science experiment.

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