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Stacking Water
In this lesson, students become familiar with how ocean water forms density-stratified layers in many places. They design and carry out a series of tests to show how water masses of four different densities interact, using clear straws to stack colored water of different salinities. Temperature is varied to increase the differences in density of each water sample.
Intended for grade levels:
  • Middle (6-8)
  • High (9-12)
Type of resource:
  • For the classroom:
    • Lab activity
    • Lesson plan
Subject:
  • Ocean Sciences:
    • Chemical oceanography
Technical requirements:
No specific technical requirements, just a browser required
Cost / Copyright:
No cost
Copyright 1998-2008 by Sea Education Association, all rights reserved.
DLESE Catalog ID: DLESE-000-000-009-036
Educational standards:
  • National Science Education Standards (NSES):
    • 5-8:
      • Unifying concepts and processes:
        • Evidence, models, and explanation
      • A - Science as inquiry:
        • Abilities necessary to do scientific inquiry
        • Understanding about scientific inquiry
      • B - Physical science:
        • Properties and changes of properties in matter
    • 9-12:
      • Unifying concepts and processes:
        • Evidence, models, and explanation
      • A - Science as inquiry:
        • Abilities necessary to do scientific inquiry
        • Understandings about scientific inquiry
      • B - Physical science:
        • Interactions of energy and matter
Resource contact / Creator / Publisher:
Publisher: Sea Education Association