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Density #1-3

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What is density? Density is a comparison of how much matter there is in a certain amount of space.

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Which one is more dense? Demonstration: People in a square How about this: Which square is more dense? Box 1Box 2

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Which one is more dense? Now which one is more dense? Box 1 Box 2

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What is density? Density = mass OR mass ÷ volume. volume Units for density: g. cm 3 ALWAYS REMEMBER UNITS!

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Let’s try a density problem together Frank has a paper clip. It has a mass of 9g and a volume of 3 ml after conducting the water displacement test. What is its density? Frank also has an eraser. It has a mass of 3g, and a volume of 1cm 3. What is its density? 9g 3 ml =3 g ml 3g 1 cm = 3 g cm

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Work on these problems with your neighbor. Jack has a rock. The rock has a density of 6g/cm and a volume of 3 ml after conducting a water displacement test. What is the mass of the rock? Jill has a gel pen. The gel pen has a mass of 8g and a density of 2 g/cm 3. What is the volume of the rock? = 18g 6 g ml 8g 2 g/cm = 4g * 3ml

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Liquid Layers If you pour together liquids that don’t mix and have different densities, they will form liquid layers. The liquid with the highest density will be on the bottom. The liquid with the lowest density will be on the top.

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Liquid Layers Check out this picture from your book. Which layer has the highest density? Which layer has the lowest density? Imagine that the liquids have the following densities: 10g/cm 3.3g/cm 3. 6g/cm 3.5g/cm 3. Which number would go with which layer?

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Liquid Layers – Try with your neighbor Which liquid has the highest density? Which liquid has the lowest density? Which liquid has the middle density?

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Super Scientist Question of the Day Jake has a book, a ruler, and a balance. How can Jake find the density of the book with the tools he has?

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