Brine is actually a word used for salt water. In this experiment, you will investigate how salt concentration affects the number of shrimp eggs that hatch and survive. Your results will allow you to determine the salt concentration which allows the most shrimp eggs to hatch. Start this experiment by writing a procedure that you can follow to do the experiment and obtain valid conclusions. How would you design your experiment to determine the best conditions for brine shrimp eggs to hatch and survive?
For the science project we were asked to create a container that will keep a large chicken egg from breaking upon impact from various heights. Our box contains six key parts that will keep the egg from breaking. The first, and probably the most important, is the small cardboard shipping box. This type of card board is sturdier than regular cardboard because it is used for shipping materials; therefore, it must be stronger then regular cardboard. This ideally will lead to the box being able to withstand the impact that will occur when the box is dropped.
Title: The Amazing Rubber Egg Lab Problem: What happens when an egg is put in Vinegar, Corn Syrup, Water (Distilled)? For 3 day? Hypothesis: I think the egg will turn rubbery when placed in these three liquids. Materials: -Measuring Cup - Distilled Water -Vinegar - Cling Wrap - An Open area to conduct this experiment. - Spoon, Tongs, etc.
According to the eighth edition of Marieb/Hoehn Human Anatomy & Physiology textbook, osmosis is the diffusion of a solvent through a membrane from a dilute solution into a more concentrated one. In the corn syrup solution, there will be a net movement of molecules out of the egg; this is a hypertonic solution, which should make the egg smaller. In the water solution, the molecules will diffuse in and out of the cell at equal rates; this is a hypotonic solution, which should make the egg bigger. Procedure: Part I of the experiment was performed by filling the holes of a petri dish filled with agar gel with dye solutions of 0.1M methylene blue (molecular weight is 374 g/M) and 0.1M potassium permanganate (molecular weight is 158 g/M). After filling the holes of the petri dish with the solution, the dish was covered and allowed to sit undisturbed for one hour.
I added a few drops of 3% Hydrogen Peroxide and it resulted in bubble formation. The positive gram stain and positive catalase test indicated that the organism belonged to the Staphylococcus Genus, which meant it was now time to pinpoint the species based on differential and selective biochemical tests. To ensure that my genus identification was correct I performed a Bile Esculin Slant with a fish tail streak on my unknown bacteria. This test resulted in neither growth nor a black precipitate; therefore I could conclude that my unknown was not Streptococci or Enterococci but indeed Staphylococcus. Next I observed the isolation streak on my Blood Agar Plate and found pinpoint, round, entire and flat colony morphology as well as an alpha hemolytic reaction pattern, indicating red blood cell ion leakage which is characteristic of S. epidermidis.
Experiment 5: Titration for Acetic Acid in Vinegar Name: Lab Partners: None Date of Experiment: March 25th, 2013 Location: My House Course Number: Chem 112 Abstract: In this experiment the objectives were develop familiarity with the concepts and techniques of titration and to determine the concentration of an acetic acid solution in vinegar. Experiment and Observation: Data Table 1: Quantity of NaOH needed to Neutralize 5 mL of Acetic AcidBrand of Vinegar Used: Heinz White Distilled VinegarLabel Notes: ______________________ | | Initial NaOH reading(Interpolate to 0.1 mL) | Final NaOH reading(Interpolate to 0.1 mL) | Volume of NaOH used | Trial 1 | 9.5 | 1.3 | 8.2 | Trial 2 | 9.7 | 1.4 | 8.3 | Trial 3 | 9.6 | 1.4 | 8.2 | Average volume of NaOH used: | 8.2 | Calculations and Errors: Errors: Calculations: A. Calculate the average number of mL of NaOH used for the 3 trials and record. B. Calculate the Normality of the vinegar using the previously given equation.
Our next prototype consisted of an egg with metal rings surrounded around it. The metal rings would act to decrease the impact upon the egg. This idea would also work but the egg inside the rings was not to be trusted to be sturdy and there was a change it would bounce around which in that case the egg would be severely damaged. Our last idea was to fill two cups with marshmallows and the egg inside centered between the
Title: The Effect of the Environment on Cellular Respiration in Yeast Name: Ryan Kiss Class: CP Biology 1 Date: 10/6/13 Statement of Problem: Does the concentration of glucose in the environment affect cellular respiration in yeast? Independent Variable: concentration of yeast Dependent variable: Production of CO2 Control: 0% molasses Controlled Variable: Amount of Bromothymol Blue (BOB), temperature of water, amount of experiment time, type of yeast. Background Information: In this experiment Bromothymol Blue was the indicator. How BOB was used in this experiment is it was placed in test tubes A, B, and C and changed color as CO2 was produced revealing the effect of cellular respiration. Cellular respiration is a chemical process that converts molasses into ATP.
Name Section Unknown Laboratory Project – Identification of Unknown Organism Project Set-up (14 pts) Name media type and forms used: Broth tube, Agar slant and agar streak plate Temperature of incubation: 37C with an incubation period of 18-24 hours (lab Manuel- pg 25) List 5 steps/procedures you followed to prevent contamination of your culture. 1. aseptic technique 2. Flaming inoculator 3. heating the tubes 4. not talking over the specimen while you are inoculating 5. close the streak plate when not in the process of inoculating List the 5 procedures you will perform to identify the unknown. 1. inoculate agar slant 2. inoculate
Observation 7 Hydrogen Gas was being performed. Observation 8 Zinc Chloride White bubbles started, and still has solid. Discussion: During the experiment we had to pour into the test tube 5 ML of Copper Sulfate Solution. Once this was done it started turning into a blue green color. Next, Zinc and Copper Sulfate combined which there was gas bubbles and the color changed into blue green color.