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How Water Moves

How Water Moves. ABC. Water Lifts. Water has a lifting force: buoyancy Water can lift things because: it is dense, a polarized molecule, has a hydrogen bond, and creates surface tension. Another force…. Another force works against buoyancy. It is called: gravity

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How Water Moves

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  1. How Water Moves ABC

  2. Water Lifts • Water has a lifting force: buoyancy • Water can lift things because: • it is dense, • a polarized molecule, • has a hydrogen bond, and • creates surface tension

  3. Another force… • Another force works against buoyancy. • It is called: gravity • When an object is placed in water, the object and the liquid push against each other.

  4. Vinegar and Water • Vinegar is heavier than water • Therefore, vinegar will push the lighter things upward • You will see what effect this creates in our lab

  5. Journeys in the life of a raisin • Pour 100 ml tap water into the 250 ml beaker • Add 1 teaspoon of baking soda • Add several raisins • Add 15 ml of vinegar • Observe what happens for several minutes, record your observations • Add another 15 ml of vinegar • Observe for several minutes, answer the questions

  6. Answer the following • Some of the raisins floated because______________ • After rising, most of the raisins sank, because______________ • After rising, some bubbles attached to the raisin at the bottom because__________________ • After rising, some raisins turned or flipped over as they sank because________________ • After a period of time, most raisins stopped rising because____________ • Some raisins did not rise because___________________ • Raisins with a lot of bubbles rise, but those with a few don’t because_______________________

  7. Bubbles • Bubbles are caused by a gas called carbon dioxide • Bubbles create a buoyancy force or lifting force • Therefore, bubbles can lift the things that they attach themselves to.

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