| As we begin looking at the concept of density we will go through an interactive Internet investigation. Go to the interactive density site (URL http://ippex.pppl.gov/interactive/matter/density.html) and read about density by going through the interactive site using the arrow button in the lower right corner that looks like this: |
Density
created by Erik Heinemann
In order to perform this internet lab activity you may need to download "Shockwave". This can be done at no cost you by clicking link provided and downloading the software. However, it is important that you disable any firewall protection for the duration of the download.
Part 1:
Answer the following questions before performing the interactive lab. To get to the lab activity you must click the "next" button just below the image.
1. Is desity a chemical or physical property? Why?
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2. In what unit(s) is density measured?
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3. What is a mathematical expression for density?
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4. Do things more dense than water float or sink in water?
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Part II
Complete the lab activity and use the information discovered to fill in the following table. Make sure that the density of water is set on 1.0 g/cc for the liquid in the pail. Measure the volume by placing items in the graduated cylinder. Measure the mass of objects by placing them on the balance.
Material |
Volume (mL) |
Mass (g) |
Density (g/mL) |
Foat or Sink |
Red Square (small) |
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Pink rectangle (small) |
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Purple oval (small) |
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Gold bar |
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Blue square (large) |
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Purple triangle |
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Red oval (large) |
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Gray triangle |
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Red rectangle (large) |
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Green triangle |
5. If the density of the liquid (water) were adjusted to 2g/cc, then what objects would float that did not float when the density was 1g/cc? Why?
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6. Was your prediction in question 5 correct? (Be honest.) |
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