Introduction
Background info Our hypothesis in this experiment was, “Tap water will produce the healthiest plants.” We also made further predictions that plants watered with bleach water would be the least healthy. Our experiment had many different variables, the independent variables were Soy milk, Big Red, Chicken Broth, and Bleach water (1% bleach in water). These variables were chosen as they very outlandish choices, but not outlandish enough that we thought they would inhibit growth much. The Dependent variables for this experiment were plant height, color, wiltedness, and number of leaves. We would simply measure how tall the plants had grown (when we saw growth), we would look and see if it had a green coloration or another coloration, we would see if it was wilted or upright,
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Our control group was tap water, as it only makes since to use water as a baseline to see how a specific plant would grow under the same/similar conditions. Our standardized variable for this experiment were temperature, soil type, plant species (Arabidopsis thaliana), light levels, container size, and the timing of watering, quantity of liquid, and temperature of the liquid were all consistent.
Materials and Methods We started our experiment by planting our seeds in 5 different containers that held approximately a pint of soil each. We also labeled each plant with the numbers 1-5, so we would keep track of each treatment based off of the numbers. After this step, each container was watered with 100 ml of water since we didn’t have all of our different liquids yet. When watering the plants was complete we placed our containers in the incubator which provides 24 hours of light to our plants, and keeps the plants at a relatively constant temperature. The temperature inside the incubator at that time was 26.3 degrees Celsius. The next day we convened we had our different
We placed elodea plants into three different beakers and labelled them. Since, we are trying to find how temperature can affect the rate of production of carbon dioxide, we had to place them in different temperatures. So, we labelled the first beaker “Elodea heat” and placed it in a water bath that produced sufficient amount of heat. We labelled the second one “Elodea cool” which was placed in an ice bath filled with ice. The next one “Elodea RT” where the elodea was placed under normal room temperature without any interference. And we named the last one “No Elodea” where we placed no elodea in it and kept the beaker in a dark
What are the effects of different solutions on the size of a cell? To find a solution this problem my group conducted an experiment/lab. The variables changed (Independent Variable) were the solutions, and the results were the change in size of the gummy bear/cell (Dependant Variable). The control group,to compare our results, was a gummy bear that was not put into any solution. The standardized variables were the color of the gummy bear, the same brand of cup, the amount of solution in each cup, and the amount of time each gummy bear spent in the solution.
Osmosis Experiment Planning Aim: The main subject that I will be planning to investigate is the effects of a concentrated sucrose solution on potato cells on the basis of the Osmosis theory. Background knowledge: The plant cell and its structure To understand osmosis in detail I will need to explain the plant cell (which is the cell included in the osmosis experiment) and its cell membrane. Below I have a diagram of a plant cell: [IMAGE] Osmosis is about the movement of particles from a higher concentrated solution to a lower concentrated solution to create an ethical balance via a partially or semi permeable cell membrane. Osmosis in simple terms is the exchange of particles between the cytoplasm inside the cell and the solution outside the cell. What makes this exhange is the partially permable cell membrane.
Going into details of the article, I realized that the necessary information needed to evaluate the experimental procedures were not included. However, when conducting an experiment, the independent and dependent variable are to be studied before giving a final conclusion.
much more prevalent, as well as prominent in the arena of social and political debate.
The main purpose of this lab was to conduct an experiment with tobacco seeds in different environments to see if it could change the phenotype of the seedlings. My hypothesis for this lab was that the environment has an influence on the development of a phenotype. My hypothesis was supported in two different ways. First of all, after switching the environment, we had more green seedlings than what we started with due to the chlorophyll being activated with the light. Second of all, we had seeds that had the chlorophyll gene sprout an Albino stem. Even when we conducted the experiment we found similar results. This is supported because when we first started the experiment, we had 25 seeds in the dark and 25 in the light. Although the first seedlings
I used Cheerios, distilled water, and a pestle and mortar. I ground the Cheerios until they had a fine, sand-like texture and consistency. I then added distilled water and mixed until I was left with a thin, runny solution, that was beige in color. Once I had the stock solution made, I was able to perform my first experiment, beginning with Benedict’s reagent. For this experiment I used a hot plate, beaker, and three test tubes, one labeled + (positive control), - (negative control), and Cheerios. Two milliliters of each solution was then added to the tubes they were labeled to go into. In this experiment, the positive control was a glucose solution. I then added two milliliters of Benedict’s reagent to each tube. Once a boiling bath had been made using water, the beaker, and the hot plate, each of the three test tubes were places, sitting upwards, into the boiling bath. A timer was set for three minutes, and I recorded the color
The effect of water quality on Vegetative measurements and photosynthesis indices of the trees are presented in Table 1. No significant differences were found between parameters: gs, shoot number in both years, but others were higher in RW application. Height of trees and leaf area in first year was not significant but in second year it increased by 42 and 29% respectively in application RW. Photosynthesis rate appears significantly higher (23.4 µmol m−2 s−1) in plants receiving recycle water than clean water.
Repeat step 4 after another minute continue this for 5 minutes Beaker Start 1 2 3 4 5 Temperature change 1 59°c 57°c 56°c 55°c 52°c 50°c -9°c 2 72°c 71°c 66 °c 63°c 60°c 57°c -15°c 3 86°c 71°c 64°c 58°c 56°c 52°c -34° c 4 72°c 68°c 65°c 60°c 57°c 53°c -19°c Main Investigation ------------------ Aim To find out weather a beaker with a larger surface area cools quicker than one with a smaller surface area. Fair test To make it a fair test we will keep the following the same: Colour of tin - we will use clear beakers Amount of water - we will use 100ml
Then, repeat steps 7-11 another 4 times but with the room temperature water. For the room temperature water just leave it in the room but try not to change the room’s temperature. 15. Try to put all your recorded data into a table for organization 16. Repeat the entire experiment for more reliable data.
The purpose of the lab was to show the effect of temperature on the rate of
We used wheatgrass were 40 wheatgrass seeds, two empty pots, soil, and water. We first added soil for both pots and 20 wheatgrass seeds in each pot. My partner and I decided that we label pot one experiment which is “sugar and water” and pot two control which is “water” only. The experiment was for almost four weeks we had to make sure both get the same room temperature and water, so we can see the results after this amount of time. Both pots had same room temperature so both can have the same amount of sunlight also, the same amount of water which is a glass of water from the sink once a week. In the experiment pot we added a glass of water with one teaspoon of sugar and the control pot glass of water. Every week we used to see both pots grow almost the same. At the end of the experiment, my partner and I measured the length for both plants and we recorded the average for each plant, so we can know the rate of growth
In our Biology Lab we did a laboratory experiment on fermentation, alcohol fermentation to be exact. Alcohol fermentation is a type of fermentation that produces the alcohol ethanol and CO2. In the experiment we estimated the rate of alcohol fermentation by measuring the rate of CO2 production. Both glycolysis and fermentation consist of a series of chemical reactions, each of which is catalyzed by a specific enzyme. Two of the tables substituted some of the solution glucose for two different types of solutions. They are as followed, Table #5 substituted glucose for sucrose and Table #6 substituted the glucose for pH4. The equation for alcohol fermentation consists of 6 Carbons 12 Hydrogens 6 Oxygen to produce 2 pyruvates plus 2 ATP then finally the final reaction will be 2 CO2 plus Ethanol. In the class our controlled numbers were at Table #1; their table had 15 mL Glucose, 10 mL RO water, and 10 mL of yeast which then they placed in an incubator at 37 degrees Celsius. We each then measured our own table’s fermentation flasks every 15 mins for an hour to compare to Table #1’s controlled numbers. At
Berkeley introduces his water experiment in order to demonstrate that in perception the perceiver does not reach the world itself but is confined to a realm of representations or sense data. We will attempt to demonstrate that Berkeley's description of our experience at the end of the water experiment is inauthentic, that it is not so much a description of an experience as a reconstruction of what we would experience if the receptor organs (the left and right hands) were objects existing in a space partes extra partes. Our argument is that there is nothing in our experience of the illusion to suggest that under normal conditions perception does not reach the world itself.
Sweating and Heat Loss Investigation Aim To find out whether heat is lost faster over a sweaty body compared to a dry body. Apparatus 2 Boiling tubes 47ml max 2 Measuring jug 50ml max A Beaker 250ml max 2 thermometers Paper towels A kettle to boil water A stopwatch 2 magnifying glasses (8x) 2 corks with a small hole through the centre A test tube rack Preliminary work In my preliminary work, I need to find out how much water to use, whether the tissue should be wet with hot/cold water, how often the readings should be taken, how accurate should the readings be, how many readings should be taken and what my starting temperature should be. My results are as follows. Starting temperature of 40°c Time (secs) Wet towel (°c) Dry towel (°c) 30 36 38.9 60 35 38.5 90 34 37.9 120 33.9 37.5 150 33 37 180 32.6 36.9 210 32.3 36.8 240 31 36.5 270 30.4 36 300 30.3 35.9 Starting temperature of 65°c Time (secs) Wet towel (°c) Dry towel (°c) 30 51.1 53 60 48.2 51.9 90 46.4 51 120 46 50 150 44.3 49 180 42.9 48.4 210 42.6 46.9 240 41.7 48 270 40.2 47.5 300 39.3 47 Starting temperature of 60°c Time (secs) Wet towel (°c) Dry towel (°c)