A liquid with a high viscosity does not floweasily — think of honey. Liquids in which the marble had the slowest velocity had the highest viscosity. To react, they need to find a perfect match with a substrate. These factors make the rate of the transpiration increase, as the transpiration increases the evaporation will increases as well. Connective tissue and a basement membrane Stratified Cuboidal online Double layer of squarelike cells, each having. You also may need to adjust the y-axis of the graphs after you input your data.
The discrepancy between the theoretical and the experimental results could be attributed to one of the following reasons: The time recording methods for dropping the spheres into the liquid was imprecise The measured spheres weight was inaccurate The length of the flask was not quite sufficient for the sphere to reach to the terminal velocity needed for settling. The answer is a property of liquids called viscosity. Hypothesis Experiment A: If the time was increased, then more toothpicks were to be broken in a short period of time. Methemoglobin is not a problem in adults since they have an enzyme that converts methemoglobin back to hemoglobin. For fluids that are thicker; more viscous, a different method is used more effectively. Drop one marble at a time and observe what happens to the marble when it enters the liquid. Grades 9 - 12 Do you agree with this alignment? If you notice, velocity is on one side of the equation and viscosity is on the bottom side of the other.
This is because the viscosity of a liquid can also be observed by how slow or fast it takes to pour the liquid. Yes No Thanks for your feedback! Repeat step 2 for the remaining liquids. Typically, fluids move faster away from the walls of the container, and fluids move more slowly the closer they are to the wall. What is the apparent relationship between viscosity of your sample, as indicated by flow time, and its density? You are encouraged to refer to this document each time you write a lab report. Remove the plunger from the syringe. Adjust the level of the liquid in syringe so that the liquid is exactly at the 3ml mark.
The hemoglobin then reacts with the nitrites to form Methemoglobin. Yes No Thanks for your feedback! The syrup now flows faster and its viscosity is decreased. Methylcellulose 1500 for example is that methylcellulose which when dissolved in water at a 2% concentration yields a solution with a viscosity of 1500 cps. What type of files may you find in this directory? Lines must be visible on the graphs!!!! The second method involves dropping a foreign object, in this case a sphere, into a cylinder of glycerol and measuring the time it takes for it to travel a specific distance down the tube. There are not any real safety concerns for this lab other than making sure correct use and care of the microscope is used. The four sources that could be the point of contamination are a new subdivision, textile plant, an organic farm, and a mountain lake. You will have the opportunity to view a video of the correct use of the viscometer.
Be sure to fill each the cylinder up to the same height each time. Which value did you measure? Yes No Thanks for your feedback! Transpiration uses about 90% of the water that enters the plant. If you want to calculate the actual viscosity of each of the liquids tested, weigh the marble in kilograms. The second method involves dropping a foreign object, in this case a sphere, into a cylinder of glycerol and measuring the time it takes for it to travel a specific distance down the tube. Record the time in your data table.
Also, the particles in the corn syrup are more compact than those in the dish soap. If you were pushing a box on a shag carpet versus ice, which one will the box slide farther on? Time how long it takes for the marble to sink. Which marbles sink to the bottom of the jar quickly and which marbles sink to the bottle of the jar slowly. How can you tell which liquids are thicker and which are thinner using the velocity? A fluid's ability to resist forces. What liquids are the most viscous and what category do these liquids tend to fall into cooking, cleaning, etc. Troubleshooting If you're having trouble timing the marble in water, which moves pretty fast, record the trial on your phone in a video. Activity Embedded Assessment Worksheet: Have students complete the during the activity.
Grades 9 - 12 Do you agree with this alignment? This evaporation can occur in a river or in a soil within plant. The purpose of this investigation was to find out how substrate concentration and temperature affect enzyme function. Mass transport through a circular tube of small internal diameter by. Which will have the lowest? Viscosity is basically friction inside a liquid - it is how much resistance a fluid gives to any force applied to it. Experiment C: If the temperature is decreased, then the reaction time decreases as well. Simple fluids which obey this relationship are referred to as Newtonian fluids and those which do not are known as non-Newtonian. Stop the stopwatch when the liquid reaches 0.
Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Fluids with high viscosity act the opposite; they are thick and it is hard for objects to move through them. . Viscosity Science Lab Purpose: To determine of changing the viscosity will affect the time it takes for a marble to flow through a liquid. The rate of flow of the liquid through the capillary represents the rate of shear. Run water through the viscometer first to use as a reference.