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## Volume and Density

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**Volume (Capacity)**• Volume is the amount of space taken up by an object • Volume can also mean how much something holds • Volume can be measured in many different units • Volume can be calculated by using water displacement!**Units for Measuring Volume**Metric Standard • Liter (l) • Milliliter (ml) • Cubic Centimeter (cc or cm3) **Remember: 1 ml = 1 cc Other Standards • Gallon (gal.) • Quart (qt.) • Pint (pt.) • Cup (c.) • Tablespoon (tbsp.) • Teaspoon (tsp.) • Fluid Ounce (fl. oz.) • Cubic Inches (in3or cu in.) • Cubic Feet (ft3or cu. ft.)**Using Water Displacement to Calculate Volume**• Measure the level of the water in a container. 70 ml 60 ml 50 ml 40 ml 30 ml 20 ml 10 ml**Using Water Displacement to Calculate Volume**• Measure the level of the water in a container. 30.0 ml 70 ml 60 ml 50 ml 40 ml 30 ml 20 ml 10 ml**Using Water Displacement to Calculate Volume**• Measure the level of the water in a container. 30.0 ml • Insert an object in the water. We’ll use a metal ball. 70 ml 60 ml 50 ml 40 ml 30 ml 20 ml 10 ml**Using Water Displacement to Calculate Volume**• Measure the level of the water in a container. 30.0 ml • Insert an object in the water. We’ll use a metal ball. • Measure the level after the ball has displaced some of the water. 70 ml 60 ml 50 ml 40 ml 30 ml 20 ml 10 ml**Using Water Displacement to Calculate Volume**• Measure the level of the water in a container. 30.0 ml • Insert an object in the water. We’ll use a metal ball. • Measure the level after the ball has displaced some of the water. 39.0 ml 70 ml 60 ml 50 ml 40 ml 30 ml 20 ml 10 ml**Using Water Displacement to Calculate Volume**• Measure the level of the water in a container. 30 ml • Insert an object in the water. We’ll use a metal ball. • Measure the level after the ball has displaced some of the water. 39 ml • Finally, find the difference between the water level before displacement and after displacement. 39.0 minus 30.0 = 9.0 ml 70 ml 60 ml 50 ml 40 ml 30 ml 20 ml 10 ml**Using Water Displacement to Calculate Volume**The metal ball has a volume of 9.0 ml! 70 ml 60 ml 50 ml 40 ml 30 ml 20 ml 10 ml**M**÷ ÷ DXV Density • Density refers to “how crowded” the particles in an object are! • Density can be measured in grams per milliliter (g/ml)**How to Calculate Density**• Find the volume of the object. You can use water displacement for this or traditional formulas (L x W x H). Let’s use the metal ball again. It’s volume was 9.0 ml! • Now find the mass of the object. You can use a scale for this. . Mass = 54.0 g • Divide the mass by the volume! 54.0 g ÷ 9.0 ml = 6.0 g/ml**More About Density . . .**• Pure water has a density of 1.00 g/ml • If any material is denser than the fluid that surrounds it, it will ___________ • If any material is less dense than the fluid that surrounds it, It will __________!**SINK or FLOAT**In Water (D = 1.0 g/mL) Density Table Float Float Float Sink Sink Sink Float (alcohol) Float (fuel)**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?**Liquid Layers – Try on your own!**• 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