Category Archives: Science

Mr. Egg in the Lab

mregginthelab

Last week we could enjoy a new round of the Collaboratories, a lab experience where Pre-U students teach Primary pupils and work together. This time, students in Classes 3 and 4 were the one who shared their time with the eldest of the school. They managed to make Mr. Egg levitate!!! How did they do it? You can go and ask them to find it out!

Take a look to the video (edited by one of our media studies pupils!)

We are all scientists

science edchat

We can shout it out loud: St. Peter’s Science Week 2014 has been a huge success. Not only because of the many activities designed to foster a passion for Science, but specially because of the enthusiasm shown by everyone.

Science was definitely in the air. In the labs, in the classes, in the theatre, in the corridors… It was impossible not to feel it and it was a pleasure to see everybody taking part and sharing their experiences together! As educators, was very special to see  students of different ages working together, teaching one another, and enjoying every minite of the Science Week.  Thank you everyone to making it possible!

You can have a look at the videos of the week.

In the mood for Science

Collaboratories

 

Maths and Science Challenges in Class 5

Science and Maths experiments
Science and Maths experiments

We learn immensely exploring and interacting with the world around us and trying to find out the answers to all those “Why?” questions we have, seeking to identify the cause of many of the world’s mysteries. So this term Class 5 have been very busy in Maths and Science taking some challenges and trying to solve some problems.
In Maths, for instance, they had to complete some challenges to finally save some Easter Bunnies. In Science they have been learning about matter and how their special properties can help us to “do some tricks”.
Have a look at their work in progress…

Working in the lab


Science surrounds us. It is everywhere in our daily lives – all day, every day!

The importance of science in our daily lives may not be obvious, yet we make science-based choices all the time. Science is involved when we choose what to eat, what to buy and when we make decisions about our health-care.

Active, hands-on experiences, as well as research and problem-solving opportunities, build an understanding of what it means to know science. Learning about science develops our ability to ask questions, collect information, organize and test our ideas, solve problems and apply what we learn. 

These are some reasons why we give such a huge importance to doing experiments in the lab. This week secondary students have been busy doing a practical chromatography experiment  and also sublimating dry ice into a gaseous form. To give you an idea of how they work in chemistry, here are some images of our students and a bit of information about what dry ice and chromatography are.

Chromatography
Chromatography is a technique used to separate pigments of a mixture. There are many different types of chromatography. While some forms of chromatography require expensive lab equipment, others can be performed using common household materials. You can use, like our students did, some spinach leaves for the pigments and alcohol and paper to complete the chromatography.

 

Dry Ice
Dry ice is the common name for the solid form of carbon dioxide. It’s called dry ice because it doesn’t melt into a wet liquid. Dry ice sublimates, which means it goes from its solid form directly to its gaseous form. Since it’s never wet, it must be dry! During this experience we added water in order to see the bubbles form.

¿Qué pasa cuando pones los huevos en vinagre? La osmosis por la Srta. Corinne.

 
Con el objetivo de comprobar qué ocurre durante la osmosis, los alumnos de 3o de ESO experimentan, durante diversos días en el laboratorio de biología, dicho proceso utilizando unos huevos.
Primero los alumnos ponen los huevos en vinagre y los dejan reposar. Al cabo de un día han perdido “milagrosamente“ la cáscara. 


Seguidamente ponen un huevo en agua destilada y otro en agua salada y dejan pasar otras 24 horas.
Los huevos que se sumergen en agua destilada aumentan considerablemente de peso  porque absorben el agua, mientras que los sumergidos en agua salada, aunque en teoría deberían perder peso, aumentan también, aunque menos. 
 
http://www.youtube.com/get_player


Conclusiones:
1. El agua traspasa la membrana semipermeable del huevo para igualar concentraciones. En el caso del huevo en sal, debería haber perdido peso pero, al haber entrado el vinagre en “juego”, es decir en el huevo, el interior sigue siendo hipertónico.
2.  Una membrana semipermeable como la membrana del huevo o la membrana celular permite pasar el agua y los líquidos pero no los sólidos.
3.   La osmosis es el proceso mediante el cual el agua se desplaza desde una solución hipotónica a otra hipertónica a través de una membrana semipermeable.
4. Nunca es tarde para aprender química y menos si es una experiencia tan divertida.
 
Excelentes apuntes de Eva Robisco
Enjoy Learning!