On day one no seeds germinated. By day two, seeds in the control group, 15% and 25% experimental groups had germinated. On day two the experimental group with 25% concentration of miracle gro’ had the most seeds
Additionally, it was difficult obtaining a piece of rhubarb that was thin and particularly red, therefore the effect could not be best observed in the cells. Part B: Design your own experiment Parts of this practical were taken and slightly altered from the following link http://www.markedbyteachers.com/gcse/science/investigate-the-effect-of-surface-area-on-osmosis-in-potato-tissue.html Aim: To observe the effect different surface area: volume ratios have on osmosis in potato tissue. Hypothesis: If the potato has a larger surface area: volume ratio, the quicker osmosis will take place and the larger the mass will be at the end of the experiment, therefore the difference in mass of the potatoes from the start of the experiment to the end of the experiment will be larger. Additionally, the potato pieces left in a saltwater solution will decrease in mass, whereas the pieces left in water will increase in mass.
We made high and low density treatments of ten seeds and two seeds respectively. Each treatment had water, soil, and fertilizer. The height and survivorship from each treatment was averaged over four weeks. These results show no significant difference between the high and low treatments.
In Lisa Parkers “Snapping Beans”, there is a sense that there is a major difference in the speaker’s world, moreover than when she is with her grandmother. In lines 24-38 in Literature to go, the speaker talks about all the things she has experienced while at college. She doesn’t want to bring reality to what seems so unreal when she is with her grandmother. While she is sitting on the porch you can tell that everything is just content and peaceful. The speakers experiencing a few trials that are bringing her down in college, but she doesn’t want to make her grandmother upset with these things so she manages to hide her pain with lies.
SPU PO3 – The Martian Nina Groenveld | VT4A Making water using hydrazine: In the movie, astronaut Mark Watney used hydrazine from the rocket fuel and separated it into nitrogen and oxygen. The formula is N2H4 → N2 + 2H2. After this he burned the hydrogen with oxygen to make water. The formula is 2H2 + O2 → 2H2O. Martian soil:
Many immigrants, such as the Irish, came to America for a better life. The potato famine, which started in the mid to late 1800’s, infected many Irish people. About 2,000,000 Irish men, women, and children perished during this terrible incident (document 1.) The majority of the Irish people were farmers and planted many potatoes. That meant during the potato famine, many potatoes were infected and rotten, so many farmers became poor and helpless.
“Children learn more from what you are than what you teach” (W.E.B DuBois). Children constantly gain knowledge from their parent’s actions and decisions. Mexican Whiteboy by Matt de la Peña, The Bean Trees by Barbara Kingsolver, and Two Kinds by Amy Tan all show different ways parents influence their child’s behavior and decisions. Throughout these three novels, parents are role models for their children through the examples they set, the way they treat them, and how they force them into situations. A child’s actions reflects the influence from their parents because they want to make their parents proud.
In the 1840’s there was a sudden surge of immigration from Ireland and Germany. One explanation was the potato famine going on in Ireland, as written by an Irish immigrant to London Times. “I shudder when I think that starvation prevails to such an extent in poor Ireland,” (Irish Immigrant, Letter to London Times). The American people did not react well to the surge of Catholic immigrants that were taking their jobs, and influencing their politics. Many people blamed all of these oppositions on just the fact that the immigrants were Catholic, criticizing them for their culture, poor social level, and drinking habits.
However, in the 17th and 18th century the potato was a startling novelty. Compared to other crops such as wheat the potato is much more productive. Because potatoes grow underground, they are not limited by the rest of the plant. The same can not be said for crops such as wheat. If wheat grows to high then it can tip over and will be destroyed.
But not also Ireland was in a panic for the potato famine but also the other country’s that depended on the cash crop. The disease spread so rapidly, this was because of the international potato seed trade. When the potato blight first appeared there was very little concern due to the good year they had with the potato until October when the saw the potato was diseased. Soon the blight spread through the west of Ireland, but still people did not believe it would be a major issue until stored potato’s were found to be rotted. For, inevitably, it was the men with the smallest holdings, striving after self-suffciency on meager pactes of soil, whp devoted there land most completely to potato cultivation the highland ptato famine in thof the 1840s .
Light, Fragile, and Easily Influenced A young college student’s mind is easily influenced, partially due to a lack of resistance toward outside forces. In the poem “Snapping Beans” by Lisa Parker, the same can be said for the hickory leaf when influenced by the wind. The leaf is the most prevalent symbol in the story. It is an integral piece to the theme of change as one transitions from childhood to the responsibilities of being an adult.
Osmosis Lab Report Research Question: How does the change in the concentration of a sucrose solution affect the process of osmosis in a potato cell by measuring its mass? Background information: 1 Osmosis is the process by which a liquid passes through a semi-permeable membrane, moving from an area with a high concentration of water to a low concentration of water. There are various factors that affect osmosis such as: concentration, surface area and temperature. The concentration of solutions can affect the rate of osmosis, as there is more difference in the concentration of the solutions, which means osmosis, will take place quicker. Surface area could affect osmosis based on the ease by which molecules can get through the semi-permeable
The overall project goals and central questions that has to do with the project is mostly trying to determine the isotonic concentration of the salt in potato roots and the use of the ideal soil salt conditions for the potato plant growth. In part 2, we had to test the enzyme activity that is in the was involved in the potato, so we can also determine the ideal soil pH conditions for the potato plant growth. In part 3, we were able to test absorb the leaf pigment at various wavelengths that determine the optimum light absorption conditions and was able to make recommendations for the light conditions that would be used un greenhouses. The goal of the first project is to determine the ideal soil salt for potato roots and we can relate this to the project is to find out if Solution A or Solution B has more solute in it. The goal of this project is to determine the meaning of Osmosis.
The percentage weight change is dependent on surface area of potato Controlled The amount of salt solution used Percentage of salt in solution Length of time the potato is sat in water Materials needed 3 Potatoes 600 ml 15% salt solution Utensils 4x 300 ml beaker Knife Cutting board Scale Ruler Procedure 1. 8 rectangular prisms will be cut from the potatoes;
Catalase Enzyme Lab: Research Question: What is the impact of the temperature (of a potato) on the rate of reaction (measured by the amount of O2 bubbles formed)? Background Information: Enzymes are proteins that aid certain chemical processes that take place. When a chemical reaction takes place, a certain amount of energy is need for it to occur. When an enzyme is present, the amount of energy needed for a chemical process to occur is reduced.
