This year, the eTwinning Conference 2010 has taken place in Seville (Spain).
Four partners of our project were invited to the conference: Claudia (Romania), Irena (Lithuania), Vladimíra (Czech Republic) and Manuel (Spain). It is unfortunate that Elżbieta (Poland) could not be in the Conference. Maybe next year.
Perhaps our students may encounter one day. It would be great.
Sunday, February 7, 2010
Wednesday, February 3, 2010
How to do invisible ink?
Experiment from Grzegorz&Justyna
It happens because hydrogen contained in the lemon juice, affixed to a piece of paper under the influence of fire reacts and stained with brown.
It happens because hydrogen contained in the lemon juice, affixed to a piece of paper under the influence of fire reacts and stained with brown.
Flotabilidad y equilibrio (Floatage and balance)
To make our experiment we need a glass bottle, marbles, pieces of white cork and a recipient with water.
First we put the marbles at the bottom of the glass bottle and we put the cork over. We put the cover and we put the boatinto the water. When can check that the bottle fleets and keep the balance.
We repeated the experiment just viceverse and we can check that the bottle fleets but doesn´t keep the balance.
Explanation:
The glass boat fleet in all cases because its weight (P) is equal to its push(E).
Respect to the balance we should notice the situation of weight and push
When we put the marbles at the bottom the centre of gravity is so down. When the boat inclines it´s generates a couple of strength which makes the boat keep the balance.
When we put the pieces of white cork at the bottom the centre of gravity is so high. When the boat inclines it´s generates a couple of strength which makes the boat doesn´t keep the balance
The more down we put the centre of gravity the more blanced.
First we put the marbles at the bottom of the glass bottle and we put the cork over. We put the cover and we put the boatinto the water. When can check that the bottle fleets and keep the balance.
We repeated the experiment just viceverse and we can check that the bottle fleets but doesn´t keep the balance.
Explanation:
The glass boat fleet in all cases because its weight (P) is equal to its push(E).
Respect to the balance we should notice the situation of weight and push
When we put the marbles at the bottom the centre of gravity is so down. When the boat inclines it´s generates a couple of strength which makes the boat keep the balance.
When we put the pieces of white cork at the bottom the centre of gravity is so high. When the boat inclines it´s generates a couple of strength which makes the boat doesn´t keep the balance
The more down we put the centre of gravity the more blanced.
by Fernando and Enrique
Thursday, January 28, 2010
Máquina de ondas (Macchina di onde)
Materiali
- Cinquanta stecchini di legno di venticinque centimetri ognuno
- Elástico di un metro e mezzo approssimativamente
Procedimento
L´esperimento consiste in unire gli stecchini all elastico a una distanza di tre cuattro centimetri ognuno. Al darli un colpo a uno degli stecchini dei laterali ottendremo che tutti gli stecchini riceveranno la onda vibratoria del colpo inziale e cosi formeranno una reaccion de cadena.
Materiales
- 50 palillos de madera de 50 cm cada uno
- Un elástico de un metro y medio aproximadamente
Procedimiento
El experimento consiste en unir los palillos al elástico a una distancia de 3 ó 4 centímetros cada uno. Al darle un golpe a uno de los palillos de los extremos obtendremos que todos los palillos recibirán la onda vibratoria del golpe inicial y se formará una reacción en cadena.
Enrique, José Luis y Borja
Sunday, January 24, 2010
Sunday, January 10, 2010
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