We then obsevered the two slides for number of cells as well as for food vacuoles inside a cell using a microscope at times of 0,5,10,20, and 30 minutes. Results The following graphs show the results of this experiment. The tetrahymena sample that was introduced to concentrated tobacco had a lower cell/vacuole ratio than the tetrahymena sample that was not exposed to
For example, an experiment similar to this one could be how pressure could affect the time it takes for an Alka-Seltzer tablet to dissolve. Using A flask and rubber stoppers, you can compare the amount of time it takes for and Alka-Seltzer tablet to dissolve in regular room temperature water and room temperature water in a flak but with a rubber stopper stopping the air flow into the flask. This is related to the experiment performed above because the increase in pressure from the rubber stopper stopping the air flow in and out of the flask may affect the time it would take for the Alka-Seltzer tablet to dissolve. Another example of an experiment related to the one performed above is how the amount of water used to dissolve an Alka-Seltzer tablet effects the time it takes for one to dissolve. This also relates to the experiment performed above because it also affects how fast the rate of reaction is.
Part A: Osmosis practical task Aim: To observe the effects of osmosis in rhubarb cells. Hypothesis: Water will be extracted out of the cells in the salt solution causing the cells to look different to the cells in the freshwater solution. Materials: Rhubarb Distilled water in a dropping bottle Salt solution in a dropping bottle Microscope, slides, and coverslips Forceps and razor blades or scalpel Paper Towel Method: Clean and dry a slide and coverslip.
1. I, Jason Schott, am the if called upon could and would competently testify from my personal knowledge to the following: SUMMARY 2. I respectfully request that this Court deny the Request for Orders filed by Elondra Schott. I respectfully ask that I keep sole physical custody of our daughter. BACKGROUND AND PREVIOUS CUSTODY DETERMINATION 3.
Watering The pH of each Celosia plant was taken using the pH meter and recorded. Each Celosia plant was sprayed with 10 sprays with the corresponding solution each day.
Investigable Question: How does light affect the protozoan population? Background: We had 3 jars, all the jars had 90 ml of water, and 0.9 grams of grass. We had saran wrap on the top of all the jars to keep the fruit flies out. Aside from making sure our water, and grass are the same.
At times, the salt was not fully dissolved in the water; there were still grains of salt that formed a layer at the bottom of the cup, and when the water was poured over the cacti, the salt formed a thick layer over the hair surrounding the top
Abstract: The purpose of this experiment was to determine whether the amount of topsoil would influence the growth of radish plants. It was hypothesized that if the amount of topsoil increased by 50% would increase because topsoil contains the essential nutrients which are required for proper plant growth. The principle findings indicated that a medium amount of topsoil is ideal for plant growth as the radish plant potted in 50 ml of topsoil experienced the most growth in comparison to the radish plants potted either in 25 ml or 200 ml of topsoil. Introduction: A healthy layer of topsoil comprises of a mixture of clay, sand, silt, and humus that supply the plants with vital nutrients, such as nitrogen, phosphorus, potassium and other necessary
The egg was the model to show me how the cell membrane worked. My hypothesis was wrong because I concluded vinegar would make the egg’s shell hard. My error in the lab, was putting the egg in the refrigerator. That affected my egg by not making any process at all. I have learned how the cell membrane functions based on the egg with different liquids.
Methods: The microscope was brought over to the table and the plastic cover was removed. It was then plugged in and turned on by clicking the on/off switch on the side of the microscope. A prepared sample was collected
If I grow four fern plants and water them with different substances such as honey water, salt water, tap water and plant food water then, I think that the plant watered with plant food mixed in water will grow the best because, plant food has all the nutrients that the plant needs to grow. In this experiment we tested which substance was best for growing fern plants in, we took some fern plants and grew them for four weeks watering them with 30 ml of water and misting them every day to see how they grew. I was correct and said that the plant watered with plant food water would do the best because plant food has all the nutrients that the plant needs to survive but in the end both honey and plant food ended with two green branches but plant
In this experiment, the sodium bicarbonate increases the rate of photosynthesis. Which trial resulted in all the leaf disks floating the fastest? Explain why you think this happened? Lettuce.
Leaves containing water-soluble elements were boiled and turned from the solid phase into the liquid phase, boiling water. The calcium carbonate was added to form insoluble calcium salts with the tannins and gallic acid so that after vacuum filtration they would be removed. The sodium chloride salt was added after the vacuum filtration in order to raise the polarity of the water, making less amount of molecules soluble in it. This is because the salt takes the part of the space in water and many compounds become insoluble and are pushed out by the salt.
Background Information: In this experiment I will be investigating the impact of light intensity on the rate of water uptake, due to transpiration, by attaching a shoot from a leafy plant in the capillary tube of a potometer, and then measuring how long it takes for a bubble to move a set distance. The faster the bubble moves, the greater the rate of transpiration. I will be placing one plant in an environment where it is exposed to high-light intensities, and another plant in an environment where it is exposed to low-light intensities. Transpiration is the process of the transport of water and nutrients up the the plant from the roots to the leaves.
Gradient elution was used in this experiment. Elution is the process of extracting one material from another with the use of a solvent. The eluent is the liquid solvent and the eluate is the product coming out from the chromatograph. Colored eluates were coming out of the column and were collected in separate test
