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# Volume and Density - PowerPoint PPT Presentation

Volume and Density. **Everything in red should go in your notes!. What is Volume?. Volume is the amount of space occupied by an object. OR The amount of space something takes up. Which one has more volume?. Equation for volume. We can find the volume of an object two ways. First way:

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## PowerPoint Slideshow about 'Volume and Density' - sheena

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Presentation Transcript

### Volume and Density

**Everything in redshould go in your notes!

• Volume is the amount of space occupied by an object.

OR

• The amount of space something takes up.

• We can find the volume of an object two ways.

• First way:

• Length x width x height

• Second Way:

• How much water gets displaced

• When labeling volume, always use units cubed (because you are multiplying 3 measurements)

• Example:

• If a box is 2 cm long, 3 cm high and 2 cm wide

• 2 x 3 x 2 = 12 cm3

• If a box is 5 m long, 3 m wide and 1 m high, what is its volume?

2. If a box is 8 cm long, 4 cm wide and 2 cm high, what is its volume?

• Density is a comparison of how much matter there is in a certain amount of space.

• Density is found by dividing the object’s mass by its volume.

• D = M / V

• Demonstration: People in a square

• Now which one is more dense?

• Density = mass OR mass ÷ volume.

volume

• Units for density: g

cm3 g / cm3

• Why are these the units for density?

• Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?

• 3 g/cm3

• Frank also has an eraser. It has a mass of 3g, and a volume of 1cm3. What is its density?

3 g/cm3

• Jack has a rock. The rock has a mass of 6g and a volume of 3cm3. What is the density of the rock?

2 g/cm3

• Jill has a gel pen. The gel pen has a mass of 8g and a volume of 2cm3. What is the density of the gel pen?

• 4 g/cm3

• Alyssa has a watch. It has a mass of 4g and a volume of 2cm3. What is the density of the watch?

• 2 g/cm3

• Mia has a wallet. It has a mass of 15g and a volume of 5cm3. What is the density of the wallet?

• 3 g/cm3

• 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.

• 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?

• Which liquid has the highest density?

• Which liquid has the lowest density?

• Which liquid has the middle density?

• Imagine that the liquids on the right have the following densities:

• 15g/cm3 10g/cm3

• 3g/cm3 9g/cm3

• 7g/cm3 12g/cm3

• Match the colors to the correct densities.

3g/cm3

7g/cm3

9g/cm3

10g/cm3

12g/cm3

15g/cm3

• What is the formula for density?

• What happens if you pour together liquids that have different densities?

• Will the liquid on the top have the highest or lowest density?

• Will the liquid on the bottom have the highest or lowest density?