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Density: Measuring Mass, Volume, and Density of Objects

Learn about measuring the mass and volume of objects to determine their density. Discover how different substances float or sink in water based on their density. Calculate density using various methods.

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Density: Measuring Mass, Volume, and Density of Objects

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  1. Activity #21DENSITY

  2. Mass • How much matter is in an object • Measured in grams (g) using a triple beam balance

  3. Volume • How much space an object takes up • The size of an object • To Measure: • Regular Objects: L x W x H • Irregular Objects: Water Displacement • Units of Measurement • Regular Objects: cm3 • Irregular Objects: mL

  4. Density Density is the amount of mass a material has for a given volume In other words… how tightly packed particles (atoms) are in a substance. Density = mass ÷ volume or D = m/v measured in g/cm3 for solids g/mLfor liquids or solids with an irregular shape

  5. Density Less dense More dense Less mass (matter) in a given volume More mass (matter) in a given volume

  6. 1 gram of feathers 1 gram of rock Which do you think would have the greater volume and mass?Why?

  7. 1 gram of feathers >greater volume same mass 1 gram of rock <less volume same mass Which do you think would have the greater volume and mass?Why?

  8. To Calculate the Density of an Object 1- Find the mass of the object 2- Find the volume of the object 3- Divide Density = Mass Volume

  9. The Dead Sea • https://www.youtube.com/watch?v=ZhL68D9BPiw

  10. You can tell if an object will sink, float, or suspend in water • The density of water is 1 g/mL • Sink –density is > density of water • Float- density is < density of water • Suspend- density = density of water

  11. Liquid substances that are less dense will float when mixed with substances that are more dense Solid substances will sink on a liquid that has less density. Example: plastic on water (water has a higher density than plastic so the plastic floats)

  12. Find the Density of a Jolly Rancher • Find the volume by multiplying the length x width x height. • Find the mass by using a triple beam balance. • Calculate the density by dividing mass by volume.

  13. Find the Density of an Irregular Object by Water Displacement • Fill your graduated cylinder up to the 60 mL mark. • Place the irregular object into the graduated cylinder and determine the difference in volume.  THIS IS THE VOLUME OF THE OBJECT. • Find the mass of your irregular object by using the tripe beam balance. • Calculate the density by dividing the mass by volume.

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