Today in the lab we did an experiment to detect the DNA of strawberries.
We followed these steps to make the experiment: instructions
these are some photos of the process:
Today we answered some multiple choice questions (that are in the CD of the Biology Book) in pairs and then we corrected the answers all together. I was with Mora Sturla. this were our answers:
On Wednesday 23rd, we went to the lab to make a new experiment related to germination. We used a jar, soil and a potato that had already started to germinate.
First, we filled half the jar with soil. Then, we cut a piece of potato and placed it on top of it. I worked with Juan Manuel Crinitti.
Yesterday we did an experiment to test the PH of different substances. We used 3 red litmus papers and 3 blue litmus papers to find out if these were acid, bases/alkaline or neutral.
These were the results:
Substance 1= blue litmus paper: red; red litmus paper: red (acid)
Substance 2= blue litmus paper: blue; red litmus paper: blue (alkaline/bases)
Substance 3= blue litmus paper: blue; red litmus paper: red (neutral)
today, 17/10/19 we watched to videos on ceci’s blog about asexual reproduction and our task was to make 5 questions to the senior 4 students about this. I worked with Mora Sturla.
questions
Today (9/10/19) we went to the lab and tested the PH of different substances with red cabbage as the indicator. I worked with Mora Sturla, Nacho Ockeki, Sofia Moyano and Santino Yacobitti.
We filled 3 test tubes with different liquids and then we put 10ml of red cabbage inside each one of them. We had to wait a few second so that the color would change. For example, in the test tube number 2, at first the liquid was green, but then it turn into yellow.
On the 9/10/19 we learned more about flowering plants. We shared these resources to help us understand more about flowers and their importance
Flower structure:
www.saps.org.uk/secondary/teaching-resources/547-the-structure-of-flowers
www.britannica.com/EBchecked/topic/357598/dicotyledon
Video clip – germination:
www.bbc.co.uk/learningzone/clips/an-introduction-to-seed-germination-and-growth/63.html
In the morning with ceci we learnt about «ph». Then,in the afternoon we went to the lab and detected the «ph» of toothpast, tap water and vinegar with ph paper.
These were the results:
Mi group was formed by Bautista Subira, Juan Ignacio Garces and Josefina Porretti. We were asked to do a cake of a plant cell. All of the information is in ceci’s blog.
Well, first of all we got together in juani’s house and sarted making the cake. We did a «biscochuelo» and we bought a lot of candies for the decoration. Each candy represented an organell of the plant cell. For the cell wall we used a paper and we sorrunded the cake with that, for the cytoplasm we used dulce de leche, for the cell membrane we used «operas», for the chloroplast we used red gummy bears, for the mitochondria yellow gummy bears and for the rybosomed we used green gummy bears. For the vacuole we used some circular candy, for the golgi aparatus we used gummy snakes and finnaly for the nucleus we used a » bon o bon».
When we finished decorating, the next day we presented our cake and explained wich candy represented each organell and we ate it all together. It was delicious!
in the lab we saw different type of cells under the microscope. We also draw how they looked.
Here are some photos of intestine cells.
Here are some photos of onion cells
