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Day 23

Day 23. Investigation 5 part 2 Layering Hot and Cold Water. Day 23. If we look at the water in this beaker under a really powerful microscope, what will we see?. The water is made up of millions of tiny particles that are always moving from place to place. ?.

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Day 23

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  1. Day 23 Investigation 5 part 2 Layering Hot and Cold Water

  2. Daily Warm-Up Exercises Day 23 If we look at the water in this beaker under a really powerful microscope, what will we see? The water is made up of millions of tiny particles that are always moving from place to place. ? If we put the beaker on a hot plate and watch through the microscope, what will we see? The particles will move faster and faster as they get warmer.

  3. How heat is transferred…. Radiant energy strikes Earth’s surface Conduction Radiation Surface molecules increase their motion Molecules of air touches the heated surface of Earth The surface absorbs the energy Energy is transferred from surface to the air

  4. Heat in solids Molecules are locked together Molecules begin to vibrate, continues through the rest of the molecules creating heat Absorbs radiant energy

  5. Heat in fluids (liquids and gases) • Molecules are not locked into position • Move around freely • Heat is transferred by one molecule touching another

  6. Challenge of the Day • Make layers of plain water that are different temperatures. • Predict and record the colors of the layers on page 27 of your lab book.

  7. Materials • 3 vials (two with caps) • 2 plastic-foam cups(to insulate cold and hot water) • 2 pipettes • 1 plastic cup

  8. Procedure • Fill a vial • Create three layers in the vial • red, blue, and clear 3/4 full Room Temperature Water

  9. Warning!!!!! • Do not bump or jostle an experiment in progress

  10. How to successfully layer Wait for water to stop moving Room Temperature Water

  11. How to successfully layer Wait for water to stop moving Carefully introduce the blue water under the room temperature water Room Temperature Water

  12. How to successfully layer Wait for water to stop moving Carefully introduce the blue water under the room temperature water Room Temperature Water Carefully introduce the red water on top of the room temperature water

  13. Layered vial • Stand for 5 minutes • Discuss with your partner what is happening

  14. Observations • What happened in your vial after is sat undisturbed for a few minutes? • The red water starts to sink to the bottom of the vial • What do you think caused the red water to start to descend? • The warm red water cooled • Increasing the density of the red water

  15. Why? • Hot red water layered on top of the room temp water? • Cold blue water layered under the room temp water? Less Dense Denser

  16. What is Density? • It is the ratio between the mass of a sample of matter and its volume. • Density = Mass / Volume

  17. Ponder this! Which is heavier? Gold or Feathers

  18. Weight and volume • Cup of beans and the cup of foam cubes • Which do you think is heavier? • Think about this: • Cups are the same size and full • How can one be heavier than the other?

  19. Mass The amount of stuff in an object You find mass by measuring the weight Volume Is how much space a sample of matter occupies Measuredusing graduated cylinders Mass vs Volume

  20. Zoom Visualization Exercise 5.1

  21. Zoom

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