Corn Syrup Project

Of course, the various sources of error have affected the results from this lab. Since the initial mass of eggs used was different for each group, the experimenters had to find the percent change in mass to keep the results constant. To conclude, when the eggs were placed in a corn syrup solution with more solute, their masses steadily decreased. The inside of the eggs have a lower solute concentration than the corn syrup solution outside the cell. Water within the eggs flow outwards through the membrane to the syrup solution, decreasing the solute concentration.

Next time I would not add air bubbles into the dish once the brine shrimp eggs were added in but before we put the eggs in the water. I would do this to prevent eggs from being moved from one dish to another or sucking eggs out of the dishes. When recreating the lab, I would take precautions to ensure the outcome would be as accurate as possible. These precautions would keep the data from being inaccurate. Before starting the lab I would make sure variables and controls were well defined.

This proves that the egg has a higher solute concentration then the vinegar. However, when the egg was placed in the corn syrup, its masses greatly decreased. The corn syrup has no water molecules, so to create equilibrium, the egg transferred its water molecules to the corn syrup,

a biology class wants to perform an experiment to investigate the effect of different colors of light of green, yellow, red and clear cellophane and plant three seeds in each one. What part do the three seeds experiment? A,Confounding variables B.Independent variables C.Control variables D.Dependent variables 40. Iodine directly helps which of the following glands to function properly?

Question 1: Evaluate other 's work: There are limitations/doubts about Mrs. Leonardos ' conclusion. In the data ,it shows two different densities which might mean she is using two different type of clay and it shows this is not a controlled experiment since in the background it states "... she begins to wonder if each differently sized piece has the same density. " So if she is trying to see if the "size" of a clay will affect the density so changing two factor results in a uncontrolled experiment.

Identify the independent Variable Size of the tablet Identify the dependent Variable Reaction time List the controlled variables The solution (water), temperature, volume of water (200 mls) The amount of Alka- Seltzer How will the dependent variables be measured A stop watch will be started as the pieces of Alka-Seltzer are dropped into 200ml of room temperture water Describe the expected results if the hypothesis is true The 3 smaller pieces of Alka Seltzer will dissolve quicker than the ½ tablet .

The dependent variable, which is the time taken for the empty muffin paper cup to touch the ground (immediately after it was dropped). This will be measured using a stopwatch, which will start when the paper cup is dropped, and stopped when the paper cup touches the ground. This will be done on table, preferably inside a science laboratory. (The table will be parallel to the muffin paper cup).

Independent Variable pH 3. Controlled Variables temperature, amount of substrate (sucrose) present, sucrase + sucrose incubation time Effect of Temperature on Enzyme Activity 1. Dependent Variable amount of product (glucose and fructose) produced 2. Independent Variable temperature 3. Controlled Variables pH, amount of

The next test used the test tubes labelled “cold” and , one again using a piece of liver and five milliliters of hydrogen peroxide with both being placed in the ice bath, both held vertical with a test tube clamp. After five minutes were up using a timer, the two tests were conducted. The test involving the boiling water had five milliliters of hydrogen peroxide poured into it. Meanwhile, the five milliliters of hydrogen peroxide was poured into the test tube labelled “cold”. After both tests, explanations were made about the

VARIABLES: There are independent variables, dependent variables, and controls. the one that is being tested and the one that is the inconsistent variable in the Independent variable like the volume and surface area of the agar cubes. The variable that is kept consistent is the dependent variable such as the percentage of diffusion of pigment in the agar cubes. The constant variable is the features of the experiment that is kept the same throughout the entire experiment such as, the amount of time the agar cubes are left in the beaker and the amount of acid in the beaker.

8) Explain how each experiment type (question 7) differs from the

Uncontrolled Environmental conditions Atmospheric conditions The controlled variable Concentration of amylase was kept under control by measuring the amount of amylase used and also it was made sure the percentage of amylase used was 1%. The Amount of amylase/starch used were kept to 5cm3 at all times. Materials needed Beakers Bunsen burner Test tube Thermometer Stopwatch Test plate Glass rod Starch Amylase solution Water bath Iodine solution. Test tube holder Labels Marker Procedure First 5 test tubes were taken and labeled with numbers from 1 to

After the egg remaining in vinegar for a few days, the size of the egg became bigger and there was less liquid left in the jar. Water moved into the egg because the egg was in a hypotonic solution that had a lower concentration of solute than the egg, water rushed into the

The experiment shall use several concentrations of sucrose solution and a substance known as Methylene blue. A piece of potato/ carrot shall be placed in a boiling tube and the solution shall be poured into it. This tube shall have Methylene blue added into it. After incubation some of this solution shall be taken out with a pipette and inserted into a separate boiling tube containing the same sucrose solution however this solution shall be known as the pre-incubated solution. The drop shall be watched so as to see if the density of the water and concentration of sucrose has increased or not, displaying the water

Rubbing, or isopropyl, alcohol is at least 70% alcohol and therefore less than 30% water. This should cause water to move from the egg into the solution, and the egg should lose mass. In addition, the egg may appear white and