We’ve been studying the Industrial Revolution in History class this past trimester. Each student picked an invention to present in class and I chose McCormick’s mechanical reaper. Here’s my visual aid presentation:
En Física estamos aprendiendo sobre la presión. Eduardo nos pidió que hicieramos dos experimentos: el del huevo y el del agua en un vaso tapado por papel.
En el primero lo unico que se necesitó fue un huevo. Se aplicó fuerza en las puntas mas angostas y no se rompió.
En el segundo se llenó un vaso con agua hasta el borde, se lo tapo con un papel y con cuidado se dio vuelta y vimos que el agua no salió.
Este es el video mostrandolos:
Este segundo trimestre en Lengua estaremos leyendo poemas de mujeres de la literatura Latinoamericana. Para comenzar, Camila nos dejo una consigna. Este es mi ensayo:
https://docs.google.com/a/lascumbres.edu.ar/document/d/17I26OJpQxCOxy0iNH0KT_ieVC4I-SI-rvs_7TtXkCrA/edit?usp=sharing
The new topic in Biology is the Endocrine System and we were to do the activities on Male’s blog:
What hormones secrete each gland:
Adrenal gland: Adrenaline
Pancreas: Insuline
Testis: Testosterone
Ovary: Oestrogen
Thymus: Thymosin
Thyroid gland: Thyroxine and calcitonin
Pituitary gland: Growth hormone
Pineal gland: Melatonin
3. ADRENALINE. State the effects of adrenaline. Chose a picture which shows a situation in which adrenaline is secreted. Explain.
Adrenaline is when you are frightened, excited or keyed up. There your brain sends impulses along a nerve to your adrenal glands, and these secrete adrenaline into the blood. The main effects of adrenaline are: Your hearts beats faster, your breathing rate increases, your pain body’s ability decreases and it causes a noticeable increase in strength and performance.
In Literature with Luz, Jose and Delfi, we worked on “The Border Builder” by Carol Rumens and wrote up a questionnaire for our peers to answer later on. Here’s ours:
1. What does the writer think ahout borders?
2. Explain the ending of the poem.
3. Who is the persona talking to?
4. Explain what effect repetition has on the reader.
5. Explain the following quotation: “My bricks, O my genuine bricks Made of my genuine blood!”
6. How can you relate the poem to the present day?
Today we went to the lab and did an experiment on extracting DNA. This is how it got carried out:
Aim:
To extract DNA from natural products
to observe the fibrilar structure of DNA.
Materials
Plastic cups – onion, banana
test tubes – Distilled water
knife – detergent
sticks – salt
a beater – ethanol
Method
1- Cut the central part of the onion into cubes.
2- Add 3 tsp of detergent and 1 of salt in a plastic cup, and pour distilled water up to the top.
3- Mix this solution with the pieces of onion.
4- Beat all the mixture at high speed for 30 seconds.
5- Filtrate the liquid with a coffee filter.
6- Fill ¼ of a test tube with the filtrate.
7- Add some pieces of banana and mix thoroughly.
8- Add the same volume of ethanol, carefully, so that it flows through the walls of the test tube and forms a layer on the filtrate.
9- Let it rest for 2-3 minutes until a cloudy area is formed between the 2 layers.
10- Extract a network of white fibres of DNA and place it on a Petri dish.
11- Add few drops of blue methylene and record your observations.
Results
Record your observations!
Discussion
a- Where in the cell is the DNA?
The DNA is in the nucleus.
b- What are the fibres made of?
The fibres are nucleotides joined together.
c- What is a gene?
A gene is a length of DNA that codes for a protein.
Conclusion
What is the DNA?
DNA is deoxyribose neuceic acid.
In History we’ve been preparing for the AS Level Cambridge Examinations that we will take next year. The first topic to tackle was the French Revolution. Here’s a timeline from 1789 to 1795: