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Layering Liquids PowerPoint PPT Presentation


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Layering Liquids. Today you are going to: layer 4 unknown liquids in a straw so that none of the liquids mixes with another. Base: potato slice Straw: 45° angle Pipet: slowly add liquid. Class Discussion: What were the results?. Isopropyl alcohol. Fresh water.

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Layering Liquids

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Layering Liquids


Today you are going to:layer 4 unknown liquidsin a strawso that none of the liquids mixes with another


Base: potato slice Straw: 45° angle Pipet: slowly add liquid


Class Discussion:What were the results?


Isopropyl alcohol

Fresh water

Salt water

Glycerin


Clean upCarefully place potato basein trash container…dropping it will splash the food coloring out of the straws!


Class DiscussionWhy did the liquids layer that way?


This beaker is filled with marbles. Can I fit anymore into this space?


Will this salt fit in the beaker ?


Now there is more stuff in here than before. Can I add anything more to this space?


This is the same amount of space as when I started with just the marbles, but now there is a LOT more stuff in here.

Jar is filled with water. It has dissolved some of the sugar at the top of the beaker.


Scientists have a word to describe how much stuff is in a certain amount of space ~ density

density = stuff

space


These terms don’t seem “official.” In math, what is space called?

density = stuff

space


volume

density = stuff =

space volume


What do we callstuffin science?

density = stuff =

space volume


Matter which has mass

density = stuff = mass

space volume


density = mass

volume


Isopropyl alcohol

Fresh water

Salt water

Glycerin

Salt water is more dense that fresh water, because in the same volume (amount) there are dissolved salts and other substances along with the water molecules. This means there is more mass in the same volume ~ making salt water more dense.


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