We don't think of liquids as floating typically, but a quick look at any oil spill tells a different story. Lesson explores various densities of liquids and why this fact is important. After observing the density variation, scholars measure to see if their calculations support their observations. 

Concepts

density, liquids, water density

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Additional Tags

science

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Instructional Ideas

• Connect the extension activity to the difference in fish that live in salt water versus fresh water

Classroom Considerations

• Remember isopropyl alcohol is flammable, so follow all safety precautions
• Projections are still images and not animated like other lessons in the series, so many methods will work in the classroom
• Lesson is the fifth in a series of six

Pros

• Provides information on where to find all scientific equipment
• Follows a 5E format
• Includes discussion questions and ideal answers to help that portion of the lesson stay on track

Cons

• None

Common Core

RST.6-8.3 RST.6-8.4 RST.6-8.7 WHST.6-8.1.a WHST.6-8.1.b WHST.6-8.1.c WHST.6-8.1.d WHST.6-8.1.e