viernes, 17 de enero de 2025

martes, 14 de enero de 2025

Are we alone in the universe?

The Earth is a little blue ball floating on the space, with very favorable conditions for life: water, atmosphere, magnetic field, oxygen... Out of here, life seems impossible: extrem hot over 5000º, or extrem cold ( - 273º); solar storms, radiation... Very hard conditions indeed. However, we do not know if there is (or not) life out of our plantet. Let's see some arguments in favor and against the existence of aliens:

In favor: Universe is very wide, even vast. So big that cannot be conceived by our human minds. Billions of galaxyies with billions of stars, many of them surrounded by dozens of planets... Why not possible that in one of those plantes life could arise?

Against: If there is life out of the Earth, How is that no Alien has come to say hello?

In favor: They haven't say hello because we are not enough important for them. If you meet an ant, "would you try to communicate with it?"

Against: Life, as we know it, is a complex thing which needs a lot of requirements for arising: water, carbon, oxygen... It is not very common to find all these elements together in a planet.

Gliese 667cc, a possibly habitable planet
In favor: As said before, the universe is very very vast. NASA is constantly finding planets defined as "habitable": this means that in those planets there is water, athmosphere with oxygen, etc.

Against: Let's assume that there is intelligent life out of the Earth. Here comes the problem of distance. The closet star to our Solar System is Alpha Centauri, which is 415.900.000.000.000 km far. And this is the closest one. Imagine the distance which an alien had to cover from remote areas of Universe. It would take hundred of years to travel from one to other habitable planet.

In favor: Alien's technology could be more advance than ours. Maybe they have found a way for travelling great distances very fast; for example, curving the space - time line.

The discussion could be eternal. What do you think? In favor or aganist the existence of aliens?


The universe.

Here I let you a couple of online activities for studying. The first one is about general elements of the Universe; and the second is about the planets in our Solar System.

General elements of the Universe.

The solar system (without asteroid belt)

Here, the video of the Solar System.


And also an on line test:

Universe and Solar System test

Finally, a link to a text. (NOTE: This text is a bit difficult. So, do not try at home. We will deal with it at class)

Are we alone in the universe?

Things at home. 4th grade A.

Here we go with a bank of resources for studying the things at home:

Things at home. Teacher's worksheet I

Things at home. Teacher's worksheet II

And other ones, for if you want to study a bit more.

Label the house

Parts of a house

Parts of the house. Text

Prepositions

There is / There are

There is / There are II

There is / There are III

There is / There are IV

Things at home

Things at home. Test type.


Also a couple of listenings. One of them will appear at the exam. Do not worry: we will work them at class next week, on Tuesday and Wednesday.




Transports. 4th grade B.

I start letting here some stuff related to transports:

Online worksheet transports

Also a listening about transports:



And some other varied things:




viernes, 13 de diciembre de 2024

Bamboozles.

We are definitively falling in love with this online game. So, I am going to let here some Bamboozles about different topics, for these days of review. Possibly I will add some more very soon.

martes, 10 de diciembre de 2024

House furniture. 4th grade B.

Tomorrow we will deal with this test. It is a good training for the exam; so I recomend you to try it at home.

Test about furniture