Matter matters by Annalisa De Ruvo https://padlet.com/viserba_deruvo/matter We experience matter and heat together in the science laboratory. From that experience students start to realised their our experiments. This is their work. en-us 2016-12-29 08:20:09 UTC 2026-01-25 18:10:16 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Balance.png Exploring about volume, weight and density viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144869253 At school we start talking about matter and its properties we can measure such as weight volume density.]]> 2016-12-29 10:59:42 UTC https://padlet.com/viserba_deruvo/matter/wish/144869253 Michelle’s photos of the experiment “Float or not float! viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144869825
She make photos of her experiment with a plastic top dipped in oil and alcohol. Oil and Alcohol don’t mix. Alcohol float over oil. The plastic top float over oil but sink in alcohol. Why?
Plastic is more dense than alcohol but less dense than oil. ]]> 2016-12-29 11:12:23 UTC https://padlet.com/viserba_deruvo/matter/wish/144869825 The cartesian little devil of Francesco viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870160 Hello! My name is Francesco Morri and I am 11 years old.

Today I show you how to make a Cartesio's little devil at home.

For this experiment we need:
a transparent plastic bottle (with its cap) almost completely full of water;
a syringe without the needle;
some iron wire;
3 iron hex nuts;
1 small weight to be put into the syringe (in case the 3 iron hex nuts are not heavy enough).

To make sure that the syringe can float vertically I modified it this way: I have attached to the syringe a ballast made of three nuts (I put the weight in the syringe and, after slipping the hex nuts in the wire, I attached it to the syringe by making two holes at the end of the syringe), then I warmed up the syringe cap (the part usually used to threading the needle) and I sealed the cap by heating it with a lighter, and closing it with tongs.

I put water into the bottle, I inserted the modified syringe and I closed the bottle with the cap. As you can see the syringe floats on the water.

Now squeezing the bottle, the syringe should sink, in fact as you can see when I press the bottle the syringe sinks, when I release the bottle the syringe gets back to float.

What does this experiment show? Why does it work?

Water is not compressible, air is compressible. When I squeeze the bottle the pressure inside the bottle increases: the water contained in the bottle cannot be compressed but the air can, therefore the water slips into the syringe, compressing the air which is inside of it, the density of syringe increases heavier and it sinks, on the contrary when I release the bottle the compressed air that was in the syringe pushes out the water from it; the density of the syringe  (wich contains now almost only air), decreases and the syringe gets back to float.

Now I show you the “original” Cartesio's little devil which explains the same phisical phenomenon. The little devil falls and rises in the water in a helical motion because the hole (where water gets in and out) is placed at the end of the devil's tail.

]]> 2016-12-29 11:26:26 UTC https://padlet.com/viserba_deruvo/matter/wish/144870160 Volume changes! viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870322 We experience thermal dilatation of gases in the laboratory at school.]]> 2016-12-29 11:32:28 UTC https://padlet.com/viserba_deruvo/matter/wish/144870322 Volumes and heat viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870330 We experience thermal dilatation of coloured water in the school laboratory]]> 2016-12-29 11:33:09 UTC https://padlet.com/viserba_deruvo/matter/wish/144870330 Lara experiment viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870354 Description of the experiment on the ballon tied to the bottle.
To perform the experiment of the ballon you need to understand that matter expands when it heats up and shrinks when it is cold. 
You need the following tools: a rubber ballon, a glass bottle a stove for the flame.
First we put the rubber ballon in the mouth of the jar. We put on the stove the bottle so prepared.  After few minutes the air inside warms up, expand and inflates the ballon. Remove the bottle from the stove and after a while the ballon will deflate because the air cools down and shrinks.

]]> 2016-12-29 11:34:14 UTC https://padlet.com/viserba_deruvo/matter/wish/144870354 Michelle an Manuel experiment viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870358 Hello! I'm Michelle. I'm Manuel. We are going to do an experience about insulation materials. We need some ice cubes, three plates, a wool hat and a polystyrene.
As you can see the ice on the open plate melted while the ice on the covered plates don’t.  Wool and polystyrene are insulation materials the don’t let heat go in or out. The heat in the room melted the ice on the open plate. We hope you like our experiment. See you the next time.

]]> 2016-12-29 11:34:32 UTC https://padlet.com/viserba_deruvo/matter/wish/144870358 Federico experiment viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870365 2016-12-29 11:34:47 UTC https://padlet.com/viserba_deruvo/matter/wish/144870365 Samuel experiment viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870373 2016-12-29 11:34:59 UTC https://padlet.com/viserba_deruvo/matter/wish/144870373 Martina, Matilde and Ilenia experiment viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870446 Hello! I’m Martina, I’m Matilde and I’m Ilenia. We are doing an experiment. 
The materials are: 2 glasses of water, kitchen film.
We took the two glasses full at the same level of water, and we cover a glass with the kitchen film. We leave the glasses at habitat temperature. The next day we see the water level in the open glass reduced. Why? 
Because the water molecules near the surface were liberated in the air as vapour. This process is called evaporation. Good bye!

]]> 2016-12-29 11:35:17 UTC https://padlet.com/viserba_deruvo/matter/wish/144870446 Sara and Elisabetta experiment viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870454 Hello everyone!
We are Sara and Elisabetta, two students of the middle school Enrico Fermi - Rimini, in Italy and we are here to do an experiment with you!
For the experiment we need: spoons in different materials (for example plastic, silver, metal, wood), butter, coloured balls, a container, hot water. 
First we attack a small coloured ball on the handle of each spoon using a little piece of butter. 
WARNING!!! The balls must must be sticked on each spoon at the same height.
Now we immerge the spoons in hot water and wait. 
What we note? 
On silver and metal spoon butter melts quicker and the coloured balls fall down.
Why?
Metals are excellent heat conductors while wood, glass and plastic are thermal insulators.

We hope you like this experience, good bye!

]]> 2016-12-29 11:35:31 UTC https://padlet.com/viserba_deruvo/matter/wish/144870454 Andrea experiment viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144870594 How to inflate a ballon without mouth and without pump.

For the experiment the materials are: a glass bottle and a little ballon.
Put the bottle in the freezer. Pul it off after few hours and apples on the neck of the bottle a deflated ballon. Have done this, put the bottle on a hot radiator. After a time you will see the ballon swelling. DO YOU KNOW WHY?
When the cold air in the bottle receive heat from the radiator get warmer and grow in volume inflating the ballon.

]]> 2016-12-29 11:40:08 UTC https://padlet.com/viserba_deruvo/matter/wish/144870594 Vladimir and Domenico viserba_deruvo https://padlet.com/viserba_deruvo/matter/wish/144873015 Hello! This is our experiment]]> 2016-12-29 13:16:06 UTC https://padlet.com/viserba_deruvo/matter/wish/144873015