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chemistry.

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mr. LLAMA

on 17 October 2012

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Transcript of chemistry.

Chemistry. A school project by Francesco Pacioni The States of Matter. It's what we use to build our world. It's what we use to get through everyday tasks. It's us, but it's also everything else. Matter. It's the world. The universe.

And, it's made up of three known states. The Three States of Matter Gases Liquids Solids When you look at a solid, you can see that the shape doesn't move, it looks definite. At the microscopic level (where things are so small that you can't look at them with your eyes alone), the particles are packed together tightly, not much is moving, unlike..... Solids. liquids Liquid particles attract each other and stick together, but always move, slip and slide against each other. Liquids take the shape of their container, they don't stand alone. You can tell that the particles of a liquid stick together by pouring some on the floor. The liquid settles and sticks together. This is called surface tension. Gases Gases are everywhere. Some look invisible, others can look like fluffy clouds. The particles of gas are structured very loosely and move around lots. The Earth's atmosphere is a thick layer of gas. The gases inside the atmosphere are made up of mostly nitrogen, there is a lot of oxygen and co2 (carbon dioxide) also makes up a big part of air. An interview with a science teacher What is the difference between solids, liquids and gases?
They are three different states of matter.

Solid Liquid gas melt to evaporate to condense to freeze to Do you know any interesting facts about the three states of matter?
The metal inner core of the earth is a solid even though it has an estimated temparature of almost 6000 kelvin. It has not melted because of the pressure on top of it. What is dry ice and why doesn't it melt to a liquid?
Dry ice is frozen carbon dioxide (co2). It changes directly from a solid to a gas because it can only be a liquid if it is under extremely high pressure (like a fire extinguisher). You wouldn't be able to freeze liquids There would be no more clouds/rain There would be no steam when you cook/take a shower Dry ice wouldn't melt Metal would be used less because it wouldn't melt/be moulded Chocolate would almost never be used as an ingredient in cakes The ice age would never end You wouldn't have ice to keep your drinks cold Snow wouldn't exist You wouldn't be able to buy frozen peas/ vegetables What if we couldn't change between the three states of matter? Solids wouldn't melt Liquids wouldn't evaporate Experiment: How to Make Plastic Milk You will need : 1 cup of milk
4 tbs of white vinegar
bowl
spoon
strainer How to do it: step 1 warm up the milk until it is hot, but not boiling s
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2 next, add the vinegar and stir for about 1 minute s
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3 pour the mixture through the strainer and into the sink s
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4 remove the white blobs from the strainer. leave them to cool. how to do it: What to do: s
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1 First, heat up the milk until it is hot, but not boiling s
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2 Next, pour in the 4 tablespoons of vinegar and stir for one minute. s
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3 Now, leave the mixture to cool. s
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4 When it's cold enough, pour the mixture through the strainer. Left behind, there should be some white blobs. s
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5 Finally, rinse the blobs under a tap while pressing them together firmly. Mould it into any shape you like. Set the shape aside to dry for few days. Soon you will have plastic milk. If you want to experiment more, try adding a variable like using citrus fruits instead of vinegar and see if you get the same results. This is the finished product. how it works. What you made was a substance called CASEIN. This happened because the acid in the vinegar doesn't mix with the protein in the milk Thanks for watching!!!!!!!!!!!!!!!!!
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