If you want to find out the approximate density of each, you can calculate it using this formula: Density = Mass/Volume. Now you know how the densities of the three liquids compare to each other. The next dense will float on top of that, and the least dense will float at the very top. Was your prediction right? If so, the liquid you thought was densest should be at the bottom of the jar. What happened? Did the three liquids mix together or separate into layers? Which liquid is at the bottom of the jar? Which is at the top? (This is not necessary if you are using dark corn syrup.)Ĭarefully pour each of the liquids into a 600 ml beaker or a large jar. Place a few drops of food coloring into the beaker of water so you will be able to tell it apart from the other liquids. Which is the densest: water, corn syrup, or vegetable oil? Which is the least dense? Based on your results from experiment #1, predict which liquid you think is the densest and which you think is the least dense. vegetable oil (you can also experiment with various types of oil, i.e.If one of your objects floated in the corn syrup but sank in the water, what does that tell you about the densities of water and corn syrup? Take the experiment a step further to find out more. The denser a liquid is, the easier it is for an object to float on it. Were your predictions right? Did the raisins and other objects sink and float when you expected them to? Did they float in one liquid and sink in another? Why do you think they acted the way they did? Take the raisins out of the beakers and try a different object, such as a paperclip or cork. Does it sink or float? Write down what happens to the raisin in each beaker. (If you are using glass jars, use 2/3 cup of liquid, which is approximately 150 ml.) Pour 150 ml of water into beaker #1, 150 ml of corn syrup into beaker #2, and 150 ml of vegetable oil into beaker #3. Because these liquids will have different densities, there will be a density tower, or different layers, that are visible, sort of like being able to see ice cubes (frozen water) in room temperature water. Write down what you think will happen when you place each object into the three different liquids based on your guess of the density of liquids. Will a raisin, paperclip, penny, small cork, ball of paper, and other small objects sink or float if they are placed in water, corn syrup (or light corn syrup), and vegetable oil? several small objects - raisins, paperclips, pennies, small corks, etc.3, 150 ml beakers (or use glass jars or clear plastic cups).Use these science projects as a foundation and then come up with unique ideas of what to test to make it your own.įrom 5-year-olds to high school students, this cool science activity to test varying densities is engaging for all ages. These experiments can make a good liquid density science fair project as well. rubbing alcohol to determine which is denser. You can perform several science experiments with liquids of different densities such as dish soap vs. This is due to the atomic structure of the elements, molecules, and compounds that make it up. If you compare rock and a cork that is the same size (meaning they have equal volume), which is heavier? The correct answer is the rock because it has more mass. There are many science experiments that help us see how various items have different densities. An object's density is determined by comparing its mass to its volume. Great science comes in all shapes and sizes, but we understand and seek to further understand science by asking ' why?' For example, why do objects that are the same size sometimes have different weights? The answer has to do with their density.
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