THE FRESHWATER LOBSTER OR CRAYFISH - RIVER PUDIO

 Arturo Pérez E2A has brought a freshwater lobster to the class. He caught it in the River Pudio very near school. The crayfish is an invertebrate, arthropod and crustacean. It resembles a small lobster. It lives in rivers and streams that do not freeze to the bottom. They don't usually tolerate polluted water.

  Freshwater lobster have two main body parts, the cephalothorax and the abdomen.

 Check out this link that Guillermo Repetto has found for more information:

More information here!

SURFACE TENSION OF WATER

Salomé Guillen E1E has done this experiment about surface tension of water.

Well done Salomé!! Keep up the good work!

Click here for more information about surface tension.

COMMON GECKO - TARENTOLA MAURITANICA

WATCH THIS VIDEO BY GUILLERMO REPETTO E2A!

GOOD WORK GUILLERMO! WELL DONE!

SCIENTIFIC PICTURES OF MOSS AND FERN

By Lucía Sanz E1D

By Sandra Rendo E1D

By Paula Santana E1D

Carmen García E1D

OBSERVING XYLEM VESSELS IN CELERY

Plants absorb water and mineral salts through xylem vessels. After photosynthesis occurs in the leaves the elaborated sap is transported to other parts of the plant through phloem vessels.
We did an experiment to see how raw sap goes up the stem. We had various hypothesis, one was that the raw sap went up the whole stem, evenly. Others thought that the water went up specific tubes designed for this purpose, but we wanted to know where these tubes are located? Some thought there was probably only one in the centre, others,that there could be more than one and many ideas of the possible distribution of these vessels in the stem arose.
 We used celery for this experiment. We put the stems in water and blue ink. After a few hours we could easily see the xylem vessels. In this case, we saw that there are many xylem vessels and they have a linear distribution on one side of the stem.
 We cut the top of the stem to see them better and represented them in our experiment books.
Here are some photos of the experiment.

ANOTHER HORSE SHOE WHIP SNAKE IN THE CLASS!

The horse shoe whip snake is very common in the south of Spain and are often found on our school grounds. Once again the maintenace workers have found one and have brought it to our laboratory for us to look after and to observe its anatomy and behaviour.
 We need to find small lizards to feed him otherwise in a few days we will let him free.