Which Colours Are Hotter?

Which Colours Are Hotter?

Lesson 10 of 18 in this unit

  • Cool+
  • Primary
  • Year 5
  • Science
  • Physics
  • Environmental
  • Citizen Science
  • ...

Lesson summary

Students conduct an experiment that demonstrates how different colours can reflect light to greater degrees.

Learning intentions:

Students will...

  • investigate how light can be reflected.

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:

  • identify sources of light, recognise that light travels in a straight path and describe how shadows are formed and light can be reflected and refracted (AC9S5U03)

Relevant parts of Year 5 achievement standards:
By the end of Year 5, students identify sources of light and model the transfer of light to explain observed phenomena.

Resources required

  • Black paper
  • Glasses x 2
  • Rubber bands x 2
  • Thermometer
  • Water
  • White paper


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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