Science+9th+grade

Emyr Diniz =“**//What was the purpose of these first two days of school and what are my plans for this year?”//** = //We where asked to analyze 3 menus and see wich best represented a short-term diet and which would best represent a long-term diet. We had to take in concideration the health of out costumers. Our team divided the menus. 2 persons analyzed each menu. Also we rated how much of each nutrient was in the diets. For example if there was a lot of lipids in the diet we would put 3 stars next to lipids. We helped each other with doubts and at the end made a ppt to demonstrate our learning. I discovered that there is a diet mainly based in proteins and fat. I saw that if we cut the carbs and only eat fat we will get skinnier(because our body will burn more fat) but it is unhealth:(. I remembered about the 6 nutrients and saw healthy foods i could start eating. Also i learned many vocab. words about nutrients such as omega3. I developed my workgroup skills because i learned to exept others ideas more.//
 * //In my opinion this two first days of school where to incurage us to try as hard as we can untill we get the things right. Make a good plan before any desigion and never giving up because if someone can do it we also can.//**
 * //My plans for this year is to try to b more foccused and make my best in all the assingments. Help my friends that need help and get good grades !media type="custom" key="10231237"//**

=// “What kind of cell //// I //// would //// like to be and why” //= //** The type of cell I would like to be is an eukaryotic plant cell. I would like to be an eukariotic plant cell mainly because i could be "lazzy" and have a better protection than an animal cell. I would get to eat without moving to get my food. I mean if i have chloropast i can do photosinthesis and get my own food. Also i have two walls that protect me! One is the cell wall and the other is the cell membrane. Also i would like to be complex do different functions. So i would =nt be a prokaryote because eucaryotic cells are more complex. Look at me below! **// =Cell Speach-= Dear Captain and all organells present in this boat, Without me you cant know how to do protein. Only i know how to process information and have the RNA to send information to the rybosomes and make protein. Without the protein there wouldnt be a cell because the whole cell is made of protein. DNA difines the genetic code which is color,size, shape etc... I am the brain of the cell i am the most important cell, without me there wouldnt be you !

=Egg Lab Investigan-= This time we decided to innovate. Together with Ms. Silva (our science teacher) we did an egg lab experiment so that we could associate to what we are learning which is cells. We pretended the eggs where cells and put them into different solutions. My group (Jae Won, Pedro Barbara, and me), had the solutions corn syrup and alcohol. We were asked each day to measure the mass, circumference, and the liquid left from the solution. The aim of the investigation was to find the effect of solutions on an eggs mass and size. Also to help us students to understand diffusion. On Wednesday each group did an outline of what each one would do each day so it made things more organized. Example of things in the outline was which person would do what. Also choose which solution we would be assigned. In my case I was assigned corn syrup and alcohol. On Thursday (day 1), after getting introduced to the project, we had to start working. We were given two eggs and 80 ml of each solution. We had to measure the mass, circumference, and liquid left of each solution. To measure the circumference we used a string to put around the egg and then measured with a ruler. To see the liquid left we used a graduated cylinder and to see the mass we weighted the egg. Then after we got all the results (which you can see in the table below) we put the eggs and solutions inside a cup and let it until the next day. Maybe one problem in our experiment was the first day we let the cup open so solutions like alcohol might evaporate more easily and make us think that the egg was the one who left the alcohol enter. On Friday (day 2), we had to go through the same procedure but when taking the egg out of the cup we had to carefully dry the egg. Also we recorded the results. On Monday (day 3), we measured everything again the same way and we got to pop our egg! To see what was inside. You may get amazed with the results but it seems that the alcohol cooked the egg and the corn syrup rotten the egg! You will see in the conclusions bellow. My grouped believed that it would be harder for the corn syrup to go inside the egg because the molecules inside the corn syrup are thicker. But actually a big amount of liquid went inside it. We never expected the egg to get brown as it got. A lot of corn syrup went inside it. The alcohol also was very cool. It really cooked the egg. The alcohols enter inside the egg and made everything solid. There was almost no liquid. //**Effect of Alcohol and Corn Syrup on the Eggs**//
 * |||||| ** Egg #1 (Corn Syrup) ** |||||| ** Egg #2 (Alcohol) ** ||
 * || Day 1 || Day 2 || Day 3 || Day 1 || Day 2 || Day 3 ||
 * ** Mass (g) ** || 67,85  ||  59,4  ||  65,85  ||  70,35  ||  65,2  ||  63,4  ||
 * ** Circumference (cm) ** || 16,5  ||  15,25  ||  15,4  ||  15,75  ||  15  ||  14,75  ||
 * ** Iquid left (ml) ** || 80  ||  84  ||  86  ||  80  || 70.5 || 57.5 ||

Analysis and Conclusion: The egg in the left is the corn syrup and the one in the right is the alcohol. As we can see the corn syrup got a lot liquid. I believe that the level in the alcohol lowered so much not only for the absorption of the egg but also because the solutions weren’t in a perfectly closed container. The alcohol absorbs very easily so it mate evaporated. It got hard in the last day and it lowered its circumference because instead of being squishy it was more concentrated. The results from the corn syrup where pretty awkward. The egg got very squishy in the end and I think this is because the particles present in corn syrup are very big so for it to penetrate the egg it was harder. Sources of error and group evaluation: My group worked together very well although we didnt follow procedure so well. I think we didnt dry the egg so well so maybe it got heavier especially in the maple syrup. Also we didnt make sure that all the solution was transfered from the graduated cylinder to the cup and that it didnt spill from the cup to the graduaded cylinder. Another error might be that not always we measured the egg from the same position. Also not always was the same person taking care of an expecific task. If I were to do this expirement again I would put in charge a pernson to measure only the mass, other only the circumfrance, and other only the liquid left.

I liked a lot this expirement and was amazed with the results.

=Cells Final Assesment-= Instead of doing a test we were asked to do a project about cells and nutrients. There were many goals we had to meet. I decided to do a board game. Some of my colleagues did an animation others wrote a song and many more types of project. We needed to explain a hard topics which were cells to children’s from age 10-12. My board game was about the life of a cell that passed through things that a real cell passes through. The winner of my game was the one who got first to the finish line. Some concepts covered by my project where: C1: I can state that the 6 main nutrients every person should get every day are carbs, lipids, proteins, minerals, vitamins and water C2: I can outline the main function of each nutrient in the body C7: I can differentiate a prokaryotic from an eukaryotic cell C8: I can outline the function of each main cell organelle C15: I can discuss the purpose of cell respiration C17: I can discuss the purpose of photosynthesis Demonstrating the following goals will help determine your grade from 2 to 7: (Mandatory) C3: I can give one specific example of how each nutrient is used by the body C4: I can discuss the health effects of diets poor in proteins, fats and carbohydrates C5: I can discuss the health effects of diets rich in proteins, fats and carbohydrates C6: I can outline the cell theory and an exception to it C9: I can discuss the importance of the cell membrane C10: I can relate the membrane’s structure with its function C11: I can differentiate passive from active transport C13: I can identify the substances involved in aerobic cell respiration C16: I can identify the substances involved in photosynthesis C19: I can explain why cells have to divide. In my opinion I liked a lot the project and think I did a good job. I liked a lot to construct a board game and think it is interesting. Here goes a link to the description of my video:

Here is a link to my test: [|https://docs.google.com/spreadsheet/viewform?formkey=dHJnajV0WHJISUpnWlU2eE9aXzdhdkE6MQ#gid=0]