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Differing Densities: Fresh and Salt Water


Source Institutions

    California Academy of Sciences

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Differing Densities: Fresh and Salt Water

In this activity, learners visualize the differences in water density and relate this to the potential consequences of increased glacial melting. This activity can be conducted as a demonstration and works best as an extension to the activity "Global Climate Change and Sea Level Rise".

Quick Guide


Preparation Time:
10 to 30 minutes

Learning Time:
2 to 4 hours

Estimated Materials Cost:
$5 - $10 per group of students

Age Range:
Ages 8 - 14

Resource Types:
Activity, Demonstration, Lesson/Lesson Plan

Language:
English

Materials List (per group of students)


  • one clear food storage box (approximately 6 inch square)
  • 4 sticks of classroom modeling clay
  • blue food coloring
  • ice cube trays
  • 4-5 intensely colored ice cubes
  • salt
  • 1/2 liter of refrigerated water
  • Differing Densities Worksheet

Subjects


  • Earth and Space Science
    • Earth Processes
      • Weather and Climate
    • Earth Structure
      • Oceans and Water
  • Life Sciences
    • Ecology
      • Human Impact
  • Physical Sciences
    • Heat and Thermodynamics
      • Heat and Temperature
    • States of Matter
      • Changes of Phase
    • Structure and Properties of Matter
      • Mass and Weight
      • Volume and Density
  • The Nature of Science
    • Science and Society
      • Risks and Benefits
      • Public Policy
    • The Scientific Process
      • Conducting Investigations
      • Formulating Explanations
      • Communicating Results
  • The Nature of Technology
    • Technology and Society
      • Technology and the Environment

Informal Categories


  • Nature and Environment

Audience


To use this activity, learners need to:

  • see
  • see color
  • touch

Learning styles supported:

  • Involves teamwork and communication skills
  • Uses STEM to solve real-world problems
  • Involves hands-on or lab activities

Other


Components that are part of this resource:

This resource is part of:

Access Rights:

  • Free access

By:

Rights:

  • All Rights Reserved, California Academy of Sciences, ©2008

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  • Thumbnail water by aikenm@glsc.org on 2014-03-13