too! Strike your xylophone with plastic and wood. Likewise, different materials make different sounds. Liquids with varying densities will produce different sounds since the sound waves travel through them in varying speeds. Sound waves can also move through other liquids like juice or milk. Since sound waves travel through liquid, by altering the amount of water in the test tube, the sound waves is altered as well. The highest pitch came from striking the test tube with the least water. You probably noticed that the more water the test tube held, the lower the pitch produced. But when you added different amounts of water, the noise changed. When you tapped the empty vessels, they all made the same sound. Try using the wooden spoon and glass stirring rod instead to hear a very different noise. Use the metal spatula to tap each vessel towards the base of the bottle. Number the vessels so the one with the most water is 1, the next highest water level is 2, and so on until the vessel with the least water is marked with the highest number.Ħ. Add a drop of food coloring (if desired) to each vessel so the water levels on your liquid xylophone are easier to see.ĥ. Fill the second with slightly more than the first, and so on, until you reach the last vessel, which will be almost full.Ĥ. Fill the first vessel with just a little water. Use the graduated cylinder to measure and pour different amounts of water into each of the vessels. Gently tap the base of each bottle with the metal spatula. Make sure they’re clean, empty, and all the same size.Ģ. 50 ml graduated cylinder or liquid measuring cupġ.3-6 glass beakers or flasks, jars, bottles or glasses of the same size and shape, or test tubes and a test tube holder (from here on referred to as vessels).
Sound Waves Science Project Test Tube Liquid Xylophone What You Need:
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