Primer Ensayo De Lengua

Nuestra profesora de Lengua, Camila, nos dio dos opciones para escribir un ensayo, yo elegí la segunda:

a. Uno es dueño de sus silencios y esclavo de sus palabras.

b. El lenguaje es el arma más poderosa.

 

A lo largo del tiempo mucha gente consideró a las palabras con armas, capaces de herir a la gente y causar un daño dentro de una persona y en ciertas ocasiones causar daño irreparable en el exterior de una persona.

 

En el mundo actual uno puede encontrar armas mucho más poderosas que las palabras, no creo que un insulto o algunas palabras discriminatorias hagan más daño que una granada, estas palabras aunque pueden hacer daño sólo se lo hacen a una persona, en cambio al tirar una bomba y matar a algunas personas el daño es mucho más grande porque por la pérdida de un familiar sufren todos los miembros de la familia.

 

En otros casos no creo que cuando alguien sale a robar un local sale sin armas pensando, “Al dueño de este local le voy a decir que es feo, tonto”, él sale con un arma porque el daño que puede hacer un arma en comparación a una palabra. Y lo mismo lo vemos en los policías, ellos no salen con diccionarios a defendernos, salen con armas poderosas para detener a los ladrones.

 

A la misma vez el habla puede ser un arma poderosa que afecta mucho a una persona a en singular, cuando uno discrimina a una persona lo que está haciendo es usar sus palabras para alcanzar lo más profundo y sensible de una persona, y esto puede llevar a casos tristes de suicidio y gente que terminó en psicólogos por el trauma sentimental irreparable.
En conclusión uno puede decir que el habla es el arma más poderosa pero en mi opinión no es así porque hay cosas mucho más fuertes y dañinas que una palabra.

Publicado en 4AC2016, Lengua | 1 comentario

Ensayo Lengua

A lo largo del tiempo mucha gente consideró a las palabras con armas, capaces de herir a la gente y causar un daño dentro de una persona y en ciertas ocasiones causar daño irreparable en el exterior de una persona.

 

En el mundo actual uno puede encontrar armas mucho más poderosas que las palabras, no creo que un insulto o algunas palabras discriminatorias hagan más daño que una granada, estas palabras aunque pueden hacer daño sólo se lo hacen a una persona, en cambio al tirar una bomba y matar a algunas personas el daño es mucho más grande porque por la pérdida de un familiar sufren todos los miembros de la familia.

 

En otros casos no creo que cuando alguien sale a robar un local sale sin armas pensando, “Al dueño de este local le voy a decir que es feo, tonto”, él sale con un arma porque el daño que puede hacer un arma en comparación a una palabra. Y lo mismo lo vemos en los policías, ellos no salen con diccionarios a defendernos, salen con armas poderosas para detener a los ladrones.

 

A la misma vez el habla puede ser un arma poderosa que afecta mucho a una persona a en singular, cuando uno discrimina a una persona lo que está haciendo es usar sus palabras para alcanzar lo más profundo y sensible de una persona, y esto puede llevar a casos tristes de suicidio y gente que terminó en psicólogos por el trauma sentimental irreparable.
En conclusión uno puede decir que el habla es el arma más poderosa pero en mi opinión no es así porque hay cosas mucho más fuertes y dañinas que una palabra.

Publicado en 2AC2014, Lengua | Deja un comentario

PATHOGENS PREZI

We studied Pathogens in Biology and in groups made presentations about it. Ours is directed to adults. I was with Mara, Nico, Gonzalo and Luna.

Publicado en 3AC2015, Biology | Deja un comentario

Diarrhoea and Cholera

In Biology we started a new topic: Cholera. Here is a task Make gave us and there we have some questions we must answer. These ones:

QUESTIONS:

1) Name signs/symptoms caused by cholera.                                                Diarrhoea (sign), vomiting (sign), feeling sick (symptom), high temperature (sign), irregular heart-beats (sign), dehydration (sign).

2) State ways in which the bacterium spreads in the village.                                The bacteria(Vibrio cholerae) spreads because of flies (agents) that transport it, because non-purified water also transport it, shaking hands that are not clean, not washing hands before and after eating or going to the bathroom…

3) What is diarrhoea?                                Diarrhoea is a sign caused by cholera that may give you a hint that you are suffering from this disease.

4) How does the cholera bacterium cause diarrhoea?                                                                       The cholera bacteria which lives and breeds in the small intestine produces a toxin that stimulates the cells lining the intestine to secrete chloride ions. Then the ions accumulate in the lumen of the small intestine and increase the concentration of the fluid in the lumen lowering its water potential. When this water potential becomes lower than the one of the blood flowing through the vessels in the wall of the intestine, water moves out of the blood into the lumen of intestine by osmosis. So large quantities of water are lost from the body in the watery faces.

 

5) How did the boy treated his father?          He filtrated and cleaned the water because at 100°C the bacteria’s enzymes become denatured and they die. He also added salt to the water in order to give the minerals back. Then he made his father drink it to calm dehydration and soon he got better.

6) Name the different actions which the boy taught to the people in the village to prevent the disease. Clean  and filtrate water, wash hands, wash food before cooking and make sure that it boils, eat hot…

Publicado en 3AC2015, Biology | Deja un comentario

Human Nutrition – Diseases

In Biology we followed with chapter 7 and diets and we studied malnutrition and it’s diseases. We saw 6 different types of diseases and we focused in definitions, causes, symptoms and treatments or preventions.  DOCUMENT

 

Publicado en 3AC2015, Biology | Deja un comentario

Human Nutrition – Balanced Diet

In Biology we started with chapter 7: Animal Nutrition. First, we started studying diets. The following is a very useful slide-share we made in class about it.

Publicado en 3AC2015, Biology | Deja un comentario

Enzymes and PH

Many plant tissues change colour when exposed to the air. The enzymes that produce the coloured products may be affected by pH.

Aim: investigate the effect of pH on the production of these coloured products formed on the freshly cut surface of a plant tissue

Procedure: First we had to cut 2 pieces of banana of 1cm wide. We had to leave one exposed to the air and the other one in a petri dish and covered with orange juice and leave them for half an hour.

After half an hour…

Colour of exposed surface: darker

Colour of surface covered with orange juice: same initial color

Conclusion: The piece of banana in the orange juice with acidic PH, didn’t let the coloured enzymes work so it stayed the same.The high acidic PH in the orange juice produced a change in the active site, so the substrate didn’t fit anymore in it.

IMG-20150619-WA0003

Publicado en 3AC2015, Biology | Deja un comentario

Enzymes and Temperature

In the lab we made this experiment in Biology. I had to post pictures of it, the graph, the table and answer the questions. The following is my work:

Aim: to observe how temperature affects the activity of catalase (enzyme).

1. Enzymes are proteins that act as biological catalysts. Catalase are a type of enzyme that break down hydrogen peroxide into water and oxygen.

2. We had three test-tubes filled with hydrogen peroxide and three pieces of potatoes (contain catalse).

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3. Then we cutted the potatoes in cubes so they could fit in the test-tubes.

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4. Following, we placed one cube and one test tube in the 1st water bath at 5°C for 2 minutes.

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5. Then we placed a potato cube into the test tube and left it in the water bath for 2 minutes.

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6. After that, we measured the height of the foam produced that represents the activity of catalse since they break down hydrogen peroxide into water and oxygen and foam is a clear example of the oxygen produced.

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7. We recorded the results in the table:

TABLE

8.  After that, we repeated steps 4 to 7 with the other cubes and test-tubes.

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9. Finally, we plotted the information in a line-graph individually. The following is mine:

Processed with VSCOcam

 

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Questions:

a. We left the potatoes and the test-tubes in the water baths before the experiments so they get used to the temperature.

b. The independent variable is the temperature of the hydrogen peroxide because we could have changed it to any other, we chose it. The dependent variable is the height of foam produced because it depended on the temperature. Two fixed variables are the quantity of hydrogen peroxide inside the test-tubes and the time we left them in the water bath.

c. The results shown in the graph show that at the temperature of 37°C enzymes work perfectly because foam was produced. At the temperature of 100°C the catalse don’t have much activity and the same happens when the temperature is low at 5ºC since there is almost no foam produced.

d. At the temperature of 37°C enzymes work better. It is the optimum temperature, the one of our body.

e. At the temperature of 100°C the active site of the enzyme loses it’s shape so the substrate no longer fits in there. It is to say that the enzyme is denatured, so it can’t break down hydrogen peroxide any longer. That is why it is very important to keep our bodies at the temperature of 37ºC.

Publicado en 3AC2015, Biology | Deja un comentario

Gas Exchange

In Biology we are studying the Respiratory System. Today we learnt about the gas exchange and we made a chart about it.

Inspired air Expired Air
Oxygen 21% 16% Respiration (raw materials)
Carbon Dioxide 0.04% 4% Respiration (waste products)
Water vapour (humidity) Variable  Always high (100%) Depends on the environment/atmosphere
Temperature Variable Always warm Mucus
Dust Variable Few, or no dust Ciliated cells

 

Publicado en 3AC2015, Biology | Deja un comentario

Respiration

We had to make some activities related to Respiration which is the topic we are studying in Biology. I was with Catu Grosso and Joaquin Venini.

1) Energy in humas is use for

  • Contracting muscles, so that we can move parts of the body.
  • Making protein molecules by linking together amino acids into long chains.
  • Cell division, so that we can repair damaged tissues and can grow.
  • Active transport, so that we can move substances across cell membranes up  the concentration gradients.
  • Transmiting  impulses, so tha we can transfer information quikl from one part o th body to another.
  • Producing heat inside the body, to keep the body temperature constant even if the environment is cold.

2)This is our mind map about respiration.

3)The meaning of oxygen debt is the extra oxygen taken in by he body during recovery from exercise, beyond the resting needs of the body.

4) This is a video we found which explains why the breathing rate does not return to normal immediately after vigorous exercise stops.

Publicado en 3AC2015, Biology | Deja un comentario