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A Matter of Density

Grade: 7-8

Lesson Time: 45 minutes

Materials Required: “CTD Data Collected on Alvin Dive No. 3904” handout (in Activity download)

Summary:

Students will learn the relationship between temperature, salinity, pressure, and density of sea water and why it is important to life in the ocean.

Massachusetts Science Education Standards:

Physical Sciences Grades 6-8: Properties of Matter

  • Differentiate between changes of properties in matter
  • Differentiate between volume and mass; define density

Life Sciences Grades 6-8: Changes in Ecosystems Over Time

  • Identify ways in which ecosystems changed in response to physical conditions

National Science Education Standards:

Content Standard A: Science as Inquiry

  • Abilities necessary to do scientific inquiry
  • Understandings about scientific inquiry

Content Standard B: Physical Science

  • Properties and changes of properties in matter

Content Standard C: Life Science

  • Populations and ecosystems

Content Standard F: Science in Personal and Social Perspectives

  • Populations, resources, and environments

Activity download: A_Matter_of_Density

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