lunes, 13 de noviembre de 2017

About volcanoes

This is amazing!!! Our heroes are going to travel to the centre of the Earth. They have discovered the entrance in the Snaeffels volcano. But we have read other messages with other volcanoes to begin our journey. But we have a little problem: we know the name of the volcanoes but we don't know where they are. 
If you want to go to the centre of the Earth you will have to discover where these volcanoes are: Mounts Etna, Apoyeque, Barva, Krakatoa, Kilimanjaro, Vesubio, Fujiyama and Mauna Loa. 
And I have found a postcard in an old book with a message that says that we can begin our journey from Spain. This is the picture. And I could only read a name: Santa Margarita. Where is that volcano? Are there other volcanoes in Spain? The answers as comments, please. You will win points!

And finally... If we want to begin our journey from a volcano, we must know how a volcano is.  Professor Lidenbrock is a geologist and of course he knows. But do you know how a volcano is? Please draw a volcano, locate all their parts and give it to me. I will put in this blog the best drawings, with extra points. 

Professor Lidenbrock, Axel and Hans arrive to Snaeffels

When Professor Lidenbrock and Axel arrive to the top of Scartaris, it is midnight but they can see the light of the sun in the sky. Probably the same image that you can see in the picture below. How it is possible to see the Sun in the midnight? What happens if you go to the Snaefflels volcano just in Christmas? Write your answers as a comment. You will win points to reach the centre of the Earth.

View from the Snaeffels on the summer solstice by Anjali Kiggal - Own work, CC BY-SA 4.0, (

miércoles, 8 de noviembre de 2017

The indecipherable messages

We had lot of messages. In my opinion there are several volcanoes to begin our journey. But two of them couldn`t be translated and I think that they are very important. Here you have those two texts. You will have extra point to your Journey to the centre of the Earth if you are able to read them. Please write the translated messages as comments.
 Ana's secret message
Pablo's secret message

domingo, 22 de octubre de 2017

Journey to the centre of the Earth. The secret message

"Go down into the crater of Sneffels before the last day of June, when the shadow of Scartaris falls across it, and you can go to the centre of the Earth. Arne Saknussemm".

This year we are going to read a fantastic book. An adapted version of Journey to the centre of the Earth, by Jules Verne. Everything begins when Professor Lidenbrock finds an old paper inside a book written by a scientist centuries ago. But he is not able to read it. Finally, with the help of his nephew Axel they can read the message. 

You are going to go to the centre of the Earth!! To begin with, you need to write a secret message similar to Saknussemm's. Read chapter one and invent your own code. Write the message in the same way that Arne but you have to choose another real volcano to begin your journey. Sign it as Arne Saknussemm. If you want, you can use invisible ink. Your mates will have to guess your message. Good luck.

Snaeffels volcano (Iceland), the door to the centre of the Earth.
(Axel Kristinsson from Reykjavík, Iceland - Snæfellsjökull in the Morning, CC BY 2.0,

And our first secret messages

Alejandra's secret message

Elena´s secret message

Nuria's secret message

Iris's secret message

Rosa's secret message

viernes, 20 de octubre de 2017

Halloween is coming.... and this year is special

But what do we know about Halloween? Since the fifth century B.C. Halloween has been celebrated as a cross-quarter day, a day halfway between an equinox and a solstice. Nowadays, Halloween modern celebration retains historic roots in dressing up to scare away the spirit of the dead. This is the reason why lot of people wear fancy dresses that day. As you know, we are learning about Astronomy in our clases in these days. In my opinion it would be funny to dress up your favourite planet, moon, comet, galaxy or nebula as a Halloween ahd write a short story about your character. I will put in this blog the best drawings and your stories.
But this year the 31st of October is a special day. It is the Dark Matter Day. Most of the matter in the Universe is Dark Matter. But... do you know what Dark Matter is? Never mind!! Time to look for information!!! Please, write your results as comments.
Have a Happy Halloween.

Halloween party at the Solar System

In Halloween, Harley Queen appears in the Sun. Harley Queen is an evil. Her boyfriends are the Joker. She calls the Joker Puddint. When Halloween finishes Harley Queen disappears in the Sun.
Laura Domínguez.

Once upon a time the planet Saturn became a zombie and wanted to eat. the stars. One day, at night, there was only the Moon and there were no stars because Saturn had eaten them.
Maribel Zamora.

Once upon a time, children were saying that in Halloween the wicked Moon was frightening the kids in the dark place in the city.
Nahia Souza

Rocío Fernández Rodríguez

In space was a very standard day for the Moon less for the Earth because it was Halloween. One day of disguise, eating candies and pass it very well. The Moon bends to the land how well it tas happening. I asked the Earth that it is Halloween and it answered that Halloween is a party where people disguise themselves as terrifying beings and they go to ask for sweets by the houses. And the Moon said that if it was a party superamusing and that party of America. The Moon very astonished asked to the Earth if you could joing and the Earth told that she was delighted but the Earth had to disguise herself. The Moon prepared a disguise of a bat and the Earth was very happy and she told the Moon that if someday there is a party they can disguise together and the enchanted Moon said yes and this story is over. Happy Halloween to the Moon.
Silvia María Gámez Calvente.

Iris Luque Barrio

This planet is called "black planet". There, live all the black cats in the universe. It's said that when someone lands in that planet all kind of misfortune happens to him for the rest of his life. Therefore, it is not recommended to aproach there.
Rosa Lens

Moon Charpy
This was once, in a country far away about 9000 years ago or so. A wizard from the country of Fancer made the moon dissapear. The inhabitants could not sleep. It was impossible. One of the girl or a magician or someone to make to the moon return the siquires ran to look for them. The next two days they brought a witch named Charpy and mixed up several spells and made the Moon appear. Everyone happy was made to sleep from that day in the country of Fancer. The moon was called Moon Charpy.
Every Halloween the children of that country draw the moon with the charpy face the witch who saved them.
Ana Cañas

About three millions years ago a star exploded very close to Mars. He was not a normal star because he had a strange illness after a few days and Mars noticed changes. Fangs had grown and he wanted to beat other planets. And from there Mars became the owner of the Solar System.
Lucía López Quesada

Once upon a time a vampire boy who did not like Astronomy... Astronomy and all subjects. His teachers always scolded him and he said that this was not his job to suck blod the humans. The sky learned of this and the cast was become in a very big star that gives a lot of light (the sun). Since then, he follows up by ignoring what was told.
Claudia Moreno Villegas

martes, 7 de marzo de 2017

Sundial Project

If you want to know what time it is, you probably watch at your wristwatch or mobile phone. But imagine that you live some centuries ago... Sundials are the oldests known instrument for telling the time. In fact, the earliest known sundial was made by Egyptians about 3.500 BC. As the Sun moves across the sky, the shadows objects cast move too. And people use this movement to know the time.
There are two parts in a sundial. One of them is called a gnomon; normally a stick that cast a shadow. The other one is a flat surface with marks, one for each hour of the day, where the shadow is projected. This is the dial plate. Those marks are usually numbered lines, the hour lines, that show the hours of the day. As the day passes, the gnomon' shadow moves around the dial; the shadow falls on a new line every hour.
Our Science Week is coming; and as every year, we are going to work about sundials. We are going to learn about these instruments, how they work, different types of sundials. And the most important... you are going to build your own sundial. Don't worry; it's very easy. Here you have some sundials made by students last year.

But, in my opinion, it is important to know about sundials in Granada too. How many sundials are there in Granada? Where are they? What kind of sundial is every one of them? Answer these questions as comments. Please, and if you can, take photos of those sundials. Send them to me and I will include your images in our blog.
And now, a very difficult question: where is the sundial of the picture below?

Construcción de relojes solares. Incluye la descripción de los principales tipos de relojes de sol así como plantillas de los cuadrantes solares para relojes orientados.
Algunos modelos de relojes solares.
Relojes solares otras semanas de la ciencia del IES Zaidín Vergeles.
La sombra del tiempo. Relojes solares del IES Zaidín Vergeles en el diario Granada Hoy.
Son muchas las páginas web dedicadas a la gnomónica y a la construcción de relojes solares. Algunas de las más representativas son:
Relojes de Sol de Mallorca.
Reloj andalusí. Web andaluza de relojes solares.
Relojes de Sol de la provincia de Málaga.
Asociación Amigos de los relojes de Sol.
North America Sundials Society.
Sundials on the Internet.

lunes, 13 de febrero de 2017

Life in a drop of water

A drop of untreated water is a very small world. Hundreds of small microorganisms like protozoans, bacteria and algae live there. We have colected different samples of water; in the laboratory we have deposited drops of water onto a glass slide, we have covered it with a cover slip and observed with a microscopy. There are lots of different small organisms living there. Here you have some pictures taken in our laboratory. We have observed protozoans like Paramecium or Vorticella, algae, even small pluricelular animals as rotifers, also known as wheel animals. We have found some parasite eggs too! 
What do you think about our experience? Try to draw one of these small organisms; I will publish the best drawings in our blog.

Parasite egg.
And here we have some of your drawings:

A Rotifer. Ainhoa Yolanda Monero Duperón, 1º ESO B.

A rotifer watched with a Foldscope. Ignacio Mengíbar, 1º ESO C

lunes, 9 de enero de 2017

Does acid rain affect leaves?

Finally, we have study the effect of acid rain on plant leaves. So, we have observed if there is any difference in leaves aspect in plants irrigated with acid solution. The results are in the following images. Can you see damaged leaves in the pictures? Can you describe differences between these two plants?

Leaves after acid rain treatment.
Leaves of plants irrigated with water,

The following pictures have been taken with a  magnifiying glass. So you can watch the difference in a better way.

Leaf treated with a solution of acetic acid 0,1%.
Leaf treated with water.

Acid rain and plants growth

We had six plates used as controls with germinated lentil seeds. Three of them have been irrigated with a solution of acetic acid 1%. The rest have been irrigated with water; these are now our control plates. The results are shown in these two pictures. You can see the difference in growth after some days of treatment.

Small lentil plants watered with acid rain.
Small lentil plants watered with water.

We had grown lentil seeds in pots. Half of them were watered with water and the rest with a simulated acid rain (acetic acid 1%). Nine days later we studied the growth of the plants. In this photo you can see both groups of plants.

Plants growth. Irrigated with water (left) and acetic acid solution 1% (right).
We want to study of acid rain affect the growth of plants; so, we had planted lentil seeds and we have measured the length of stems and roots in plants nine days later. The results are in the following tables. The first one shows the results in plants irrigated with acetic rain. The second one shows the results of the control set, irrigated with water.

Plants growth with acid rain

Plants growth irrigated with water.

What do you think about the influence of acid rain on the growth of plants? Are there differences between plants trated with water and with acid solution? How does acid rain affect plants growth? Please, write your answers as comments.

Acid rain and plants germination; final results.

These are the final results of our experiment about the effect of acid rain on the germination of lentil seeds. We have tested low concentrantions of acetic acid and only with acetic acid 0,1% we have obtained positive results. However the proportion of germinated seeds is lower than in seeds germinated only with water. In the next table you have the data.

Please, study the result of our experiments and write your conclusions.