In this lesson, students apply volume problemsolving concepts to situations involving density, which is defined as the mass of a substance per unit volume. Density is an important concept for many modeling applications.
Students are attending to precision (MP6) when they track and convert units through the course of these tasks.
Lesson overview
 17.1 Warmup: A Kilogram by Any Other Name (5 minutes)

17.2 Activity: Light as a Feather (15 minutes)
 Includes "Are you Ready for More?" extension problem
 17.3 Activity: A Fishy Situation (15 minutes)
 Lesson Synthesis
 17.4 Cooldown: Float or Sink? (5 minutes)
Learning goals:
 Comprehend that density (in spoken and written language) is mass per unit of volume.
 Use volume formulas and the concept of density to solve problems.
Learning goals (student facing):
 Let’s use volume and density to solve problems.
Learning targets (student facing):
 I can solve problems involving density and volume.
 I know that the density of an object is the ratio between its mass and its volume.
Required materials:
 Scientific calculators
Glossary:
 density  The mass of a substance per unit volume.
 Access the complete Geometry Course Glossary.
Standards:
 This lesson builds on the standard: CCSS.HSGGMD.A.3MS.GGMD.3MO.G.GMD.A.2
 This lesson builds towards the standards: CCSS.HSGMG.A.2MS.GMG.2CCSS.HSNQ.A.1MS.NQ.1MO.G.MG.A.2MO.A1.NQ.B.3a
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