The density of vinegar is 1. Then accept your hypothesis, otherwise reject it. Friction is the resistance one object encounters when moving over another. Interestingly, the volume of beans seems to be about the same in each jar, but I can see signs of sprouting in the control jar small white rings in the center of the swollen green beans and not in the test jar, suggesting that the lower pH might interfere with sprouting. Think of all the variables you are holding the same and the ones that change even slightly.
Vinegar only has dipole-dipole forces and London dispersion forces; therefore, it supports the least mass. Much less sticky mess to clean. To make the math a bit easier I figured I should have 1000 mung beans in each sprouter…. Therefore, increasing temperature decreases viscosity. The data might be slightly different because of experimental and statistical errors. Viscosity and boiling point are both physical properties that are determined by intermolecular forces.
For example, the density of water between about 0 and 4 degrees Celsius will actually increase with increasing temperature. You probably remember that all matter, including liquids, is made of molecules. You probably have a qualitative understanding of relative viscosities of different liquids, meaning you can describe them pretty well just by watching them. In conclusion, the purpose of my science fair project is to prove that as temperature increases, viscosity and surface tension both decrease, and to determine the relationship between viscosity and surface tension at a constant temperature. Liquids move slower, up to the point of freezing where they cease to move altogether. Amount of sugar grams 20 40 60 80 100 Drip time seconds 27 31 35 39 43 Use the below graph to plot the results of our science project. Amanda Thank you so much for your response.
Be careful because pouring some viscous liquids such as cooking oil down the sink can clog the drain. Time Taken to Complete the Project: 3 months Objective The purpose of my science fair project is to prove that as temperature increases, viscosity and surface tension both decrease, and to determine the relationship between viscosity and surface tension with a constant temperature. This measurement stands out from the rest and we think that this is because perhaps the glue had a longer amount of time to dry over 10 seconds which would have resulted in a longer time taken for it to give away. Perform multiple trials for each liquid tested and take the average time for each of them. It's the materials inside those products.
Ask an Expert The Ask an Expert Forum is intended to be a place where students can go to find answers to science questions that they have been unable to find using other resources. However, most of the hydrogen bonds in the water are broken at higher temperatures; therefore, water supports the least mass at higher temperatures. This time of year, most of the questions I get focus on how to graph the data collected. For any other use, please contact Science Buddies. For lubricants, motor oils and cooking oils the viscosity is also sensitive to the temperature and varies in different temperatures.
Viscosity can also be determined by measuring the rate at which steel spheres fall through the liquid. Increasing temperature usually decreases viscosity because the molecules have more energy to move past each other, and there is less intertwining. Does the density of the oil change with temperature? I did 6 trials, each trial with 3 temperatures 60, 80, 150 degrees. Before I heard back from you we had already done the project using salt water made with sea salt. Drop in one penny and time use stop watch how long it takes to hit the bottom of the container, listen for the sound of the penny hitting the glass. Project description The effect of temperature on viscosity has been the subject of research by universities and manufacturers of lubricant oils for many years and has lead to development of additives and materials that can control the viscosity of oil in different temperatures. As the liquid gets colder, its viscosity, or resistance to flow, increases.
This is because the molecules are moving about more, and therefore spend less time in contact with one another. Abstract The objective: The question I asked is: Does temperature affect the viscosity of a liquid? You need enough maple syrup to fill the glass container; in general, the taller the better because it will be easier to detect changes in the rate at which the pennies fall. Liquids, however, have friction, too—not just against solids for example, water against a drinking glass —but also internal friction, the liquid against itself. The problem is that there are so many different oils and so many different applications. There should be a big enough difference in viscosity to slow down the pennies.
For phytoplankton need sun to photosynthesize this could spell death. Use one sentence to state the problem you are addressing or observation made; then one sentence to describe the question; one sentence to indicate your hypothesis; one sentence to describe how you will test the hypothesis i. Material needed for experiment can be obtained locally or via the internet. Can you please explain why we need 30 pennies. For instance, when a liquid is heated, it will evaporate and change into a gaseous state.
I understand how to do a line graph, but how do I place my information? My son is 10 and had so much fun with this project. As the temperature increases, the water molecules move more rapidly; therefore, the hydrogen bonds are being broken. It is what allows your shoes to grip the floor so you don't slip and it's what makes your bike come to a stop when you squeeze the brakes. Add 1 cup of water to 3 control jars. Measure it and find out. Even though, particles in the vinegar move more rapidly with increasing temperature, there are still dipole-dipole forces in the vinegar. Effects of temperature on viscosity of oil Introduction Viscosity is one of the important physical properties of many fluid products.