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What is density?

What is density?. Density is a comparison of how much matter there is in a certain amount of space. Which one is more dense?. Now which one is more dense?. What is density?. The amount of mass in a given volume . The Formula For Density. Density = mass OR mass ÷ volume.

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What is density?

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

  2. Which one is more dense?

  3. Now which one is more dense?

  4. What is density? The amount of mass in a given volume.

  5. The Formula For Density • Density = mass OR mass ÷ volume. volume

  6. Units for density: g cm3 Why are these the units for density? ALWAYS REMEMBER UNITS!

  7. Let’s try a density problem together. Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density? On your table try and find the density. • Density = mass OR mass ÷ volume. • volume

  8. Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density? • Density = mass OR mass ÷ volume. • volume Density = 9g ÷ 3cm3 = 3g/cm3

  9. Frank also has an eraser. It has a mass of 3g and a volume of 1cm3. What is its density? • Density = mass OR mass ÷ volume. • volume

  10. Answer Frank also has an eraser. It has a mass of 3g and a volume of 1cm3. What is its density? • Density = mass OR mass ÷ volume. • volume 3 ÷ 1=3g/cm3

  11. Work on these problems with your neighbor. 1.) Jack has a rock. The rock has a mass of 6g and a volume of 3cm3. What is the density of the rock? 2.) Jill has a gel pen. The gel pen has a mass of 8g and a volume of 2cm3. What is the density of the rock?

  12. Answer 1. Jack has a rock. The rock has a mass of 6g and a volume of 3cm3. What is the density of the rock? • Density = mass OR mass ÷ volume. • volume 6 ÷ 3= 2g/cm3

  13. Answer 2. Jill has a gel pen. The gel pen has a mass of 8g and a volume of 2cm3. What is the density of the rock? • Density = mass OR mass ÷ volume. • volume 8 ÷ 2=4g/cm3

  14. Now, try these on your own. 3.) Al’Licia has a watch. It has a mass of 4g and a volume of 2cm3. What is the density of the watch? 4.) Mia has a wallet. It has a mass of 15g and a volume of 5cm3. What is the density of the wallet?

  15. Answers 3. 4. • mass ÷ volume. • mass ÷ volume. 4 ÷ 2=2g/cm3 15 ÷ 5=3g/cm3

  16. Liquid Layers • Check out this picture. Which layer has the highest density? • Which layer has the lowest density? • Imagine that the liquids have the following densities: • 10g/cm3. 3g/cm3. • 6g/cm3. 5g/cm3. • Which number would go with which layer?

  17. 3g/cm3 5g/cm3 6g/cm3 10g/cm3

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

  19. Which liquid has the highest density? • Golden Syrup • Which liquid has the lowest density? • Oil • Which liquid has the middle density? • Water

  20. Measuring the Volume by Displacement of Water 1. Take the initial reading (without the object). 2. Place the object in the cylinder. 3. Take the final reading. 4. Subtract the the original amount from the final amount.

  21. Mistakes

  22. Try this with your partner. 1. Take the initial reading (without the object). 2. Place the object in the cylinder. 3. Take the final reading. 4. Subtract the the original amount from the final amount.

  23. Original volume = 200 cm3 • Final volume = 260 cm3 • cm3 - 200 cm3 = 60 cm3 • Object volume = 60 cm3

  24. What is the volume of the Toy Dinosaur?

  25. Original volume = 4.8 cm3 • Final volume = 5.6 cm3 • 5.6cm3 – 4.8 cm3 =.8 cm3 • Object volume = .8 cm3

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