Variables (example): Problem: Will the mass of an egg change after being soaked in distilled water or corn syrup for 24 hours? Variables: a) Independent (Manipulated) - what are we changing? The amount of liquid in the cup, with the egg is manipulated because we don’t have a lot of corn syrup. Therefore, the result might be different if there was more corn syrup. b) Dependent (Responding) - what is being measured? How much the mass of the egg (amount of water inside) increases or decreases after 24 hours of soaking in the liquids. The mass is depends on what happens after 24 hours with the distilled water/corn syrup. c) Control – List all the things that need to be held constant to make this a fair test. The amount of time the distilled water and corn syrup are with the egg in …show more content…
Step 3: After, shell is removed, carefully remove egg from vinegar and place on a paper towel. Step 4: Record observations of the egg after vinegar. (texture, how it looks, etc……) Step 5: Get your triple beam balance and weigh the egg in grams (remember to place a paper towel underneath egg while weighing) Step 6: Record Measurements Step 7: Place an egg in a one of your 2 cups before placing egg name cup distilled water Step 8: Pour distilled water on top to cover the egg Step 9: Place plastic wrap on top of cup to cover the egg filled with distilled water Step 10: Now take your other egg from the vinegar used to take out shell. Step 11: Record observations of the egg after vinegar. (texture, how it looks, etc……) Step 12: Get your triple beam balance and weigh the egg in grams (remember to place a paper towel underneath egg while weighing) Step 13: Record measurements Step 14: Place the second egg in your second cup Step 15: Pour corn syrup on top of the egg to cover
In the book Cajun Country by Ben Earl Looney, there is a small article in the book called “Steen’s Syrup Mill.” Steen’s Syrup Mill is located in Abbeville, Louisiana and is the largest sugarcane plant in all of America. Steen’s Mill “markets ribbon cane syrup across the nation” and all around the entire world (Looney 152). The Sugar Mill is important to the Acadiana industry and “employs about 250 local men” during the cane-grinding season (Looney 152). This type of mill creates jobs for the local people which is good for the local industry.
In almost every experiment, there’s an independent and dependent variable, a constant, and a control group. The independent variable in this lab was the coins. The dependent variable was the density. The constant was the amount of water. In this lab, there was no control group .
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 .
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?
The one thing that changes most is the density. Eggs come in many different sizes, shapes, and colors, so each egg will be a bit different from each other. If you get a white egg from Publix, it will have a different density and volume than a brown egg from Target. “Density is mass divided by volume, which means that if you can measure both the mass and the volume of an object, you can calculate its density” (Hoff). To find the density, you divide the mass of an object by its volume.
Exploration Title: Effect of Temperature on rate of Osmosis Submitted By: Abdulkarim Kamal Date Submitted: October 19th 2015 Subject: Biology HL Teacher: Mr. Nick Aim: This is an investigation to determine the relation between temperature of a solution (sucrose) and the rate of osmosis Scientific Context: Osmosis is defined a passive transport process in which a fluid diffuses across a semi-permeable membrane, from an area of high solute concentration to an area of low solute concentration and vice-versa. There are various factors that could potentially influence the rate of osmosis; these factors include volume, concentration, and temperature. If all external factors that may interfere with rate of osmosis are controlled, the results will show equal amounts of fluid on both sides of the barrier (membrane); this is known as an “isotonic” state.
The difference between dependent and independent variables is that the independent is the variables that are changing or controlled in an experiment to test the effects on the dependent variable. In the Stefan-Boltzmann law experiment, for example, volts would be the independent variable while the radiation in millivolts would be the dependent variable. 7. What are the differences between qualitative and quantitative
Also, the pictures above show how the egg changed from being tight and solid to being flexible. The observations also say that the egg felt like a water balloon and was full of water inside. Overall, the egg greatly shrunk in size. Finally, when the egg was placed in corn syrup, it floated on the surface of the solution. This was because the egg floated in solutions hypertonic to its inside.
7. In this experiment, if the sucrose concentration were increased to 70 g/l would you expect sucrase activity to be significantly higher than the activity at 35 g/l. Explain your answer. No, because based on the results once it reached 30 g/l 35 g/l the results had stayed the same. There, the activity is lessening and coming to what looks like a plateau. 8.
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.
3. Containers A and B will be in favorable conditions and containers C and D will be in unfavorable conditions. 4. Container A and C will be your control groups and containers B and D will be your experiment groups. 5.
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
The Effect of Sugar Concentration on CO2 Production by Cellular Respiration in Yeast Introduction In this lab, our main focus was to find how sugar concentration affect yeast respiration rates. This was to simulate the process of cellular respiration. Cellular respiration is the process that cells use to transfer energy from the organic molecules in food to ATP (Adenosine Tri-Phosphate). Glucose, CO2, and yeast (used as a catalyst in this experiment) are a few of the many vital components that contribute to cellular respiration.
The hypothesis we came up with for this project was that in the distilled water there wouldn't be no change in the potato, we wouldn’t see a gain or loss with the water sitting in the beaker. The beaker with the 30% Sucrose and Distilled water we predicted that there was going to be weight gain to the potato. And for the distilled water with the 30% sucrose and we predicted weight loss. But the results came out to be the first bag content being isotonic the second bag came out to be hypotonic and lastly the result came out to be
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