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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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Presentation Transcript
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Today you are going to:layer 4 unknown liquidsin a strawso that none of the liquids mixes with another
slide5

Isopropyl alcohol

Fresh water

Salt water

Glycerin

slide6

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

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

density = stuff

space

volume
volume

density = stuff =

space volume

what do we call stuff in science
What do we callstuffin science?

density = stuff =

space volume

matter which has mass
Matter which has mass

density = stuff = mass

space volume

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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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