Good bye eTwinning

This is our last experiment.

In order to make our experiment we needed two plastic bottles of 1´5 liters.

In the first place, we perforated a hole of 1 cm in the corks of the two bottles. Soon we filled one of the bottles with water until approximately three fourth parts and if united the two bottles by the corks. In order to unite the two bottles insulating tape can be used. Is very important a good union between the bottle.

When the bottle with water is on the empty bottle it is observed that the water does not fall easily to the inferior bottle, but if we give a circular movement to the superior bottle is generated an eddy and the water falls easily.

When placing the bottle in the superior part, water does not fall by the little compressibility of the air locked up in the inferior bottle that does not leave space to the water that falls. When the eddy is generated when moving the superior bottle, it is put in communication the air that is in both bottles and the water of the superior bottle falls easily in to the inferior bottle.

Tin´s race

In order to make this experiment you need the following materials:

1. An empty softdrink can.
2. A baloon. If we don' have, we can use expanded polystyrene (white cork)

In order to continue with our experiment we make the following procedure:
1. Blow up the baloon.
2. Rub the baloon against your hair or a wool article (for example a scarf).
3. Put the softdrink can knocked down on a table and we approach the baloon. After doing this, we can check that the softdrink can move!

Explanation:
This happens because when rubbing the baloon electricity loads. The attractive electrical forces between the loads or different signs of the baloon and the softdrink can make the tin rotates.

A balloon does not explode

In Spanish

Sunset

In Spanish and Chinese

Refraction

First in Spanish and then in English

Floating ink

Wee need water, ink and salt

Ink floats on salt water because the density is lower

By Carmen and Ana

Arc en ciel

Par: Marta, María, Manuel et Ada.

Flexible bone

Experiments from Ania&Jessika&Nicola

Needed materials:
chicken's bone , vinegar, jar
Put the bone into the jar and fill with vinegar. Screw the lid on a jar and to put back on 2 weeks.



So vinegar is rinsing chemical associations's mineral out in the bone organic compounds stay.
The bone is elastic and it isn't possible for her to break.

Package from Spain

Thank you Spain!

Playing with air pressure

Transparent and Opaque

Easter Traditions in Poland

There were holidays in April in Poland. We would like to tell you something about them. Easter is very traditional holiday for us.
It is a happy and important event for all Christians, because of Jesus resurrection. 40 days before Easter there is a Lent to prepare our hearts and souls for the resurrection of Christ. The last days of Lent are called Paschal Triduum. All of us go to church on these special days. Maunday Thursday is the beginning of Paschal Triduum.

On Holy Thursday we commemorate the Last supper. Good Friday’s when Jesus was crucified. There is no singing in church. No instruments can be heard. We pray silently by the cross which is a symbol of Christ suffering. On that day we limit our food to one and two small meals and don’t eat any meat. The Holy Saturday is the day preceding the day of resurrection . In the morning the entire families go to church in order to bless food. We also go to church in the evening in order to participate in the Holy Mass. The priests bless water and fire. On Sunday Easter we participate in a very ceremonial mass early in the morning. It is the Resurrection Mass. After that the entire families sitt down at table and have special breakfast. We eat the food blessed by the prest in the church. After breakfast children get presents. We wish each other Happy Easter. In the afternoon we meet our friends and relatives. Before the Easter we have a lot of housework. We must clean our houses and flats and prepare food. But we like Easter so much!

The symbol of Easter is egg and Easter bunny. We also paint eggs prepare in many different patterns and colours. Eggs are the most important dish on our Easter table.



We prepare them in different ways . There are also: white sausage, żurek (tradition soup) and horserdish. On Monday People play a special games. Boys throw water over girls. In exchange they get a sweet. Another Easter game is hitting hard- boiled eggs against each other. The person whose egg doesn’t break is the winner. Next game is Egg hunt- eggs made of chocolate hidden in various place for children to find.

Obedient pole

We need: a piece of fabric, a pole, a glass, a piece of cork, a needle, a bottle

I put a needle into a piece of cork. The sharp end of the needle is outside of the cork. I put the cork in a neck of a bootle. I put a glass on the needle. I charge a pole by rubbing with a piece of fabric. I put the pole on the glass. I put my thumb close to the pole and make it move.

Electrostatics by Pavla

Electrostatics by Ondra

We need a plastic folder and small pieces of paper. Rub a piece of fabric with the plastic folder. Put the plastic folder above pieces of paper. The small pieces of paper are drawing up to the folder because the folder is charged and electrons and nucleons in the pieces of paper form dipoles.

Package from Czech Republic

Cypriot students enjoyed presents from Czech Republic. 

Thank you Czech Republic!

Easter Traditions in Cyprus

Package from Spain

Feria de Abril

On fête la fête! Venez à Séville au printemps pour connaître la Feria de Abril. À bientôt!

Water don' falls

Materials you need. A glass, water, paper

Fill glass with water. Cover glass with the piece of paper. Hold the paper with hand ant turn glass with 180 degrees. Take your hand off the paper.

Water don't fall because air pressure push up the paper.

Customs and traditions of Easter

Airzooka - The air gun

Package from Romania

Spanish students enjoyed presents from Romania

Experiments from Ania&Jessika

To draw the balloon charged by the friction to the tiny trickle of water. The trickle of water is leaning toward the balloon. Description: This happens due to polarization of water molecules in an electric field of the balloon. A water molecule forms an electric dipole. Negatively charged balloon attracts the positive charges in the water molecule, water molecules are oriented such that thier positively charged side is closer to the balloon.

Package from Spain

Polish students enjoyed presents from Spain.

Package for Cyprus from Czech students

Veronika and Lukáš:
There are two photo albums. One is about a castle in Frýdlant and the second is about a chapell Kostnice in Kutná Hora.
In Frýdlant´s castle album you can see wonderful chairs. Albrecht from Valdštejn lived there. He was very good captain of the imperial army. How you can see it´s a very nice castle.
In Kostnice you can see a lot of bones of our famous kings. There is a pyramid of bones. We hope you will like it.

Pavla and Katka:
We are sending BEBE biscuits, because we like it. These are our favourite biscuits, we hope, you will like it.
Bára and Božena:
Orion is typical Czech firm for production of sweets. The Students´ seal is very good chocolate. It's chcolate with peanuts, raisins and jelly. Hope, you will enjoy it!

Eliška:
There are delicious spa biscuits.They are made in Mariánské lázně. Mariánské lázně is a Czech town with a famous spa, it is a place, where people go to cure themselves and to improve their health.I have chosen this present, because we like sweets.

Vojta:
I brought Bohemia chips Grande.It is typical for the Czech Republic and I hope you like it. It is my favorite food. Enjoy it!

Ondra:
Hašlerky are typical Czech bonbons which are named after the famous Czech man Karel Hašler. Karel Hašler was born on 31 October 1879 and he died on 22 December 1941 in Mauthausen. Karel Hašler was a songster, an actor, a composer, a writer, a dramatist and a producer. Enjoy them.

Tereza, Klára and Daniela:
These biscuits are typical Czech sweet. The name of its manufacturer – Opavia comes from a Czech town Opava. Hope you’ll like it.

Aluminium rod and heat

Jan´s experiment from the Czech team
Pierce the middle of an aluminum rod, slightly above the center of gravity. Hang the rod on a revolving stand. Stick a glass-headed pin in a cork stopper, and use this as the axis of rotation. Put the rod in the horizontal position. Make one side hot. As the rod is heated, this raises the energy of particles and thus increases their weight. So the heated arm is heavier and sinks down :-).
Truth be told. Heat extends the aluminum rod; the center of gravity moves to cause a new rod position, with a stable center of gravity below the point of suspension.

Magic Mirror

Package from Czech Republic

Spanish students enjoyed presents from Czech Republic

Package from Cyprus

Spanish students enjoyed presents from Cyprus

Package from Poland

Spanish students enjoyed presents from poland

Package from Spain

Czech students enjoyed presents from Spain.

Package from Cyprus

Czech students enjoyed presents from Cyprus.

Package from Poland

Packages from Cyprus

Packages from Cyprus to Czech Republic and to Spain.

Egg into Bottle

You will need: a glass bottle a boiled egg hot water

1. Peel the boiled egg
2. Pour hot water in a bottle for a while
3. Put the egg immediately on the top of the bottle
4. The egg goes through

When you pour warm water into the bottle, the air inside the bottle expands. The egg goes through because the air pressure around pushes the egg inside the bottle.

Hot Air

We need a candle and a pinwheel

We light the candle and we put the pinwheel above the candle. The fire from the candle warms the air. Hot air goes up and moves the blades of the pinwheel.

Air Expansion

Tools: a balloon, two glasses, hot and cold water

At first pour a glass of cold water and a glass of hot water. Put the balloon into the glasses. The balloon in the glass of hot water inflates. The balloon in the glass with cold water deflates. The balloon inflates in hot water because the motion of particles is accelerated due to the heat, and the particles scatter. The balloon deflates in cold water because the motion of particles is slowed down.

Package from Spain

Here you can see some things from Spain we send to our partners in Romania





to ours partners in Poland




and to ours partners in Czech Republic and Cyprus.

Ice cube and pillow

We will need:
a pillow
few ice cubes
2 glasses

I’ll take ice cubes and I put them into the glasses. Now, I’ll give the pillow on the first glass with ice cubes.
We have to wait for 2 minutes.
After 2 minutes we can see how the ice cubes under the pillow melt down as slowly as ice cubes without a pillow. Why? The pillow doesn't heat, pillow keeps a body temperature. So, the pillow can't heat up ice cubes.

The egg which bounces

Buried in sand

Can you put a full bottle of water in a full glass of water?

A glove that comes to life

To perform our experiment we need a latex glove, a plastic bottle and a water container.

We cut the bottle in 2 parts and then we fit the glove on the top of the bottle.
If we introduce the bottle in the container we can see that the glove is filled with air

Explanation
The air trapped inside the bottle is pressed and the glove is filled when we introduce the bottle in the recipient.

This increasing of pressure depends on the amount of water that comes into the bottle.

Package from the Czech Republic to Spain

Honza: Crisps

I have choosen crisps because I like crisps. I don't think crisps are typical food but I don't think crisps are unusual for Czech Republic , so therefore I am sending crisps.

Bára: Paper weight

I have chooen this thing, because glass industry is typical to the Czech Republic. The paper weight is engraved with the capital Prague and the famous Prague Castle.

Eliška: Spa biscuits

There are delicious spa biscuits. They are made in Mariánské lázně. Mariánské lázně is a Czech town with a famous spa, it is a place, where people go to cure themselves and to improve their health.I have chosen this present, because we have got a lot of spas in the Czech Republic.

Veronika and Lukáš: Bell

It´s a very nice bell with a picture of Frýdlant. It´s one of our city. It´s a beautiful city with a big castle. I hope you will like it.

Klára: Tourist stamps

Important places have got tourist stamps. Tourist stamps can be bought in any town, any trip around the Czech Republic. There are a lot of kinds of tourist stamps. I have chosen Liberec for you, because I live here and it's my hometown. In Liberec you can find several tourist stamps such as tourist stamps as Zoo, Ještěd ect. My family collects stamps from trips, and because we are very good tourists we have got many stamps of various castles, cities, ...I think tourist stamps are very beautiful memories for trips.

Ondra: Bobbin lace

Bobbin lace is typical for the Czech Republic.
Vamberk is a town in Orlické moutains.
Historians mention its lace firstly in year 1642.
Lace is used for clothing and at home.

Katka and Pavla: Orion

I am sending you chocolate because I love chocolate. Orion is a typical symbol of Czech chocolates. And so, therefore I am sending you chocolate.

Pick the coin without wet your hand.

The collapsing can

Fill a large bowl with cold water.
Add a tablespoon of water in the empty can. 
Heat the can until the water begins to boil.

Very quickly turn the can upside down into the bowl of cold water. 

Inflating a balloon with a vacuum pump.

Gluing glasses

Wet the kitchen paper with hot water.

Swish hot water around one glass and then lay the kitchen paper on it. 

Swish hot water around the other glass. 

Pour it out and place the second glass upside-down over the first.

Explosion of colour

In a plate put milk and add some drops of food colouring ( red, yellow, green, blue)

Put in a cotton swab a drop of liquid dish soap. 

Touch the cotton swab to the centre of the milk without stir it. 

Another one Fountain

The glass is upside down and the water ... is not coming out.

We fill the glass with water and cover it with the piece of carton.

Carefully we turn it upside down, holding at the beginning the carton.

We move our hand away. The water is not coming out.

Can you pick the coin without wetting your hand?

Fill the bottom of the plate with colored water.

Place the candle in the middle of the plate.

Light the candle.

Take the glass and place it over the lit candle.

Experiment from Elena and Victoria 

Fireproof Balloon

Fill a balloon with water and then blow to inflating it.  Light the candle and hold the balloon over the flame. The flame does not pop this balloon.

Balance the nails

Balance all the nails on the head of a nail.

Make a Fountain

Pour some water in the bottle. 

Heat the bottle until the water begins to boil. 

Close the bottle and quickly turn it upside down  into the bowl of colored water. 

Fireproof Balloon

I fill the balloon with water, I blow air in it and then I  hold it over the flame of the candle. 

The balloon does not burn. 

Balloon kebab

            Pick a sharp kebab stick and put on it oil. Carefully push it into the balloon near the neck. Then push it out of the balloon through the opposite the neck side.

Ice hook

I will try to lift up the ice with a toothpick. You can see it does not work. So I sprinkle salt on the ice. I wait for 5 seconds. Now it works because salt lowers the temperature so the toothpick sticks in the ice.

Making ice cream

First I pour cream on the bottom of a glass and add some vanilla sugar to it. Second I take a tiny cup, and I fill it with snow. Then I measure the temperature of the snow. I pour a lot of salt there, I mix the snowy mixture, and I measure the temperature again. The temperature is falling. When the temperature is around minus 12 degrees Celsius, I put the glass with cream and sugar into it. Third I stir the cream to make it smooth till it´s frozen, and I taste it.

Team Presentation and eTwinning Project Work

Winter

Polish group during winter holiday.

It has been quite cold for few days, about -20 degrees C.

Whirl of water

Materials needed: two plastic bottles 1,5 l and strong adhesive tape.

At the beginning you need to make the hole in the cups then fill a bottle with water and spin. Later you join the two bottles and twist tape around. At the end invert the bottles, shake them and observe the water whirl.

cohesive forces

Necesary materials:
big bowl, water and tablet's packaging.

To make this experiments pour some water into the bowl. From the tablet's packaging cut out the places where tablets were and put them carefully onto the water. Observe their movement. At first we will see interaction of just two elements and later the others.

The elements cut of the tablet's packaging represents molecules, which attract each other. Among the particles we can observe forces of the molecules interaction. They can attract each other and therefore they are also called cohesive forces. In fact the interaction among the molecules is the effect of the surface tension of liquid.
You see that one of pieces haven't attracted each other. It is because it is partially submerged.

Ping Pong

To our experiments we need: ping - pong ball and hot water.

First we make a dent in ping - pong ball. After that we put it into the hot water.
The ping - pong ball is round. Why? Because air in the ping-pong ball expands.

Balloons

Needed materials:
2 balloons, piece of the thread
We blow up balloons and hang them up on threads close to each other but without direct contact.
Next we rub them energetically with piece of fabric or dry paper.
Description:
On the basis of this experiment it is possible to state that rubbing some substances is triggering changes causing interaction. It is possible to divide electrifying materials in two categories.
Materials belonging to the same category after charging are pushing off, and materials belonging to all sorts categories attract each other.

Cyprus, our beautiful island

Hello from Egkomis Gymnasium, Nicosia, Cyprus

Floating ink

by Georgy and Ana Maria

Materials you will need: a glass with water, salt, ink, a spoon.

In the glass with water put a lot of salt and then mix it well. Over the water with salt put some ink.

The ink floating because its density is lower than salt water density.

Swirled Milk

by Melania and Andreea

Materials you will need: food Colouring, liquid dish soap, shallow pan/dish, whole milk (room temperature)

Put some milk into the pan. Allow the milk to come to room temperature. Add a few drops of different coloured food colouring into the pan of milk. Add a few drops of liquid dish soap into the pan of milk. Watch to see what happens.

The fat in the milk is broken down by the liquid soap. This causes the food colouring to swirl and make some really neat designs.

Disapearing coin

Experiment from Andriy&Mattheus

To this experiment we need: a glass, a water, a coin.

We put coin on the table and cover it with glass. Look! We can see a coin.
After that we pour water .... and now we can't see a coin.
Why? Because of refraction.

Soapy froth

by Daiana and Corina

Materials you will need: vinegar.a Bowl, washing powder

Take a spoonful of soap powder and place it in the bowl Add several drops of the vinegar onto the soap powder in the bowl.

This reaction becomes a bubbling froth that gives off carbon dioxide gas. Once it finishes frothing, it leaves behind a salt substance that is not edible (DO NOT eat this salt). This chemical reaction is caused by the vinegar acting as the acid and the soda is the base.

Shiny coins

by Miruna and Beatrice

Materials you will need: paper towel , lemon, knife, plastic cup or bowl, dirty/old copper coins

Cut the lemon ans fill the cup/bowl with some lemon juice. Put the dirty copper coins in the juice and let them soak for a few minutes. Remove the coins from the cup/bowl and place on the paper towel..

Oxygen in the air reacts with copper, making a copper oxide coating. This is what makes copper coins dirty. The acid in the lemon juice reacts with the oxide and removes it from the coins – making then shiny copper coin.

Romanian team

The water does not spill

Experiment from Nicola

Needs:
glass, water and piece of papre


The glass is filled with water and covered with a sheet of paper. The water does not spill when we rotated the glass, because the paper is sucked to the glass of the pressure.

Home made video

Salt crystals

Experiment from Ania & Asia


Needs:
- water
- salt
- a glass or jar
- some tool (we used spoon)


Prepare saturated solution of salt water. Try to mix as much salt in wateras is possible. Put the tool into the glass. (You can also attach a piece of woollen yarn in the middle of the little stick). Put the glass in a warm place for a couple of weeks.

Observe the appearance of salt crystals. The grown crystals are in the shape of cuboids with shiny and smooth sides.

Eggs

Experiment from Kasia & Asia


Needed materials:

- 2 eggs (1 raw, 1 hard boiled)
- 1 litre jar
- salt

The way of carrying out the experiments:


Fill half of the jar with water. Prepare a solution of salt and water. Put the eggs into the solution in which the eggs should sink. Observe the movement of the eggs when a little amount of fresh (sweet) water is being poured in.

Raw eggs has a bigger density than water, that's why it sinks after putting it into the jar with fresh water. Adding salt to water, increases the wieght of water. The weight of fresh water is smaller than the weight of egg. Dissolving salt in water increases the force of uplift which acts on the egg.

Strong Air

Aids: a stick or a ruler, a big piece of newspaper Lay a ruler on a table.

Hit the ruler. The ruler flies away without breaking. Again, lay the ruler on the table and put a piece of newspaper on it so that there is no air under the newspaper. Flatten the piece of newspaper carefully. Quickly hit the ruler again. The ruler is broken.

The air above the piece of newspaper pushes it down with a big force. The ruler isn´t strong enough to lift the piece of paper. When you hit the ruler slowly, there is enough time for some air to flow under the piece of paper and to balance the air pressure under and above the paper.