DensityPresentationOutline - Chemistry 101 Unit 7 Density...

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Chemistry 101 October 10, 2007 Unit 7 – Density, Activity 7.2 - Outline for Lesson Plan Activity 7.2 – Comparing the density of objects to the density of water. Objectives: o Students should be able to predict which objects will float and which objects will sink o Students will learn how to compare the density of water to two or more other objects o Students will learn how to create a “balance point” on a standard ruler o Students see how to create a homemade balance using scotch tape, a standard pencil and a ruler o Students should be able to explain why the size of an object does not determine whether it will sink or float, for example they can compare a large piece of wood to a small pebble. Michigan Benchmarks and Standards: o Matter and Energy (PME) IV.1 Elementary Middle School High School All students will measure and describe the things around us: Describe and compare objects in terms of mass, volume, and density. Key concepts: Units of density—grams per cubic centimeter or grams per milliliter. Measurement tools: Balance, measuring cup or graduated cylinder, metric ruler. o See C-I.1 m.4 (making measurements) Real-world contexts: Common objects and substances. Explain when length, mass, weight, density, area,volume or temperature are appropriate to describe the properties of an object or substance. Key concepts: Appropriate metric (s.i.) units. o C-I.1 m.4 (use measuring devices) Measurement tools: Balances, spring scales, measuring cups or graduated cylinders, thermometers, metric ruler.
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