Why Does Food Rot?

Why Does Food Rot?

Lesson 1 of 18 in this unit

  • Cool+
  • Primary
  • Year 3
  • Science
  • Chemistry
  • Inquiry Skills
  • Environmental
  • Citizen Science
  • ...

Lesson summary

Students conduct an experiment to demonstrate how food can be preserved.

Learning intentions:

Students will...

  • demonstrate the preservation effects of chemicals on food. 

Success criteria:

Students can...

  • conduct an experiment to prove a theory. 

Lesson guides and printables

Lesson Plan
Student Worksheet

Lesson details

Curriculum mapping

Australian Curriculum (v9.0) content descriptions:


Students learn to:

  • consider how people use scientific explanations to meet a need or solve a problem (AC9S3H02)

Relevant parts of Year 3 achievement standards:
By the end of Year 3, students identify solutions that use scientific explanations.

Resources required

  • Antibacterial hand soap
  • Apple, sliced into 6 equally sized pieces
  • Jars, small, x 6
  • Paper plates x 6
  • Permanent marker
  • Salt
  • Student Worksheet
  • Sugar
  • Tongs
  • Vinegar
  • Water


This lesson is designed to build students’ competencies in the following skills:

  • curiosity
  • reflection
  • critical thinking

Additional info

Level of teacher scaffolding: Medium - support students in the theories, practical experimentation, and explaining and recording their observations. 

This is an original Cool+ lesson.

Related professional learning

How to Teach Science More Effectively

Quick summary: This course will help teachers better understand and apply evidence-based tools for effective science teaching.

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