Why Do Some Things Float and Some Sink?

Why Do Some Things Float and Some Sink?

Lesson 9 of 18 in this unit

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

Lesson summary

Students conduct an experiment that demonstrates the arrangement of particles in water.

Learning intentions:

Students will...

  • investigate how the arrangement of particles in water causes objects to float on its surface.

Success criteria:

Students can...

  • conduct an experiment to prove a theory. 

Lesson guides and printables

Lesson Plan
Student Worksheet

Curriculum links

Select your curriculum from the options below.

Lesson details

Curriculum mapping

Australian Curriculum (v9.0) content descriptions:

Science:

Students learn to:

  • explain observable properties of solids, liquids and gases by modelling the motion and arrangement of particles (AC9S5U04)
  • explain observable properties of solids, liquids and gases by modelling the motion and arrangement of particles (AC9S5U04)

Relevant parts of Year 5 achievement standards:
By the end of Year 5, students relate the particulate arrangement of solids, liquids and gases to their observable properties.

Resources required

  • Bowl, small
  • Dishwashing liquid
  • Ground pepper
  • Paper clip
  • Toothpick

Skills

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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