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Matter

Matter. Kinetic Theory of Molecules. Engage – Dry Ice. Write down what you observed about the dry ice? What happen? How do you explain what in occurring?. Explore- Investigate. Station 1 : Molecules in Motion A . Procedure

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Matter

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  1. Matter Kinetic Theory of Molecules

  2. Engage – Dry Ice • Write down what you observed about the dry ice? What happen? How do you explain what in occurring?

  3. Explore- Investigate Station 1: Molecules in Motion A. Procedure • 1. With the help of your partners, use droppers to carefully place 1 drop of yellow and 1 drop of blue food coloring into the hot and cold water at the same time. • 2. Allow the colors to mix on their own as you watch them for a couple of minutes. B. Observation Questions: • 1. Describe what the colors looked like and how they moved and mixed in the cold water. • 2. Describe what the colors looked like and how they moved and mixed in the hot water. • 3. What does the speed of the mixing colors tell you about the speed of the molecules in hot and cold water? • 4. There were several variables in this experiment: • • Amount of water in each cup • • Type of cup used • • Number of drops of food coloring • • When the coloring was added to the water • Pick one of these variables and explain why you made sure it was kept the same in the two cups.

  4. Explore- Investigate Station 2: Molecular Attraction A. Procedure • 1. Rinse a penny in tap water and dry completely. • 2. Place the penny on paper towel. • 3. Use an eye dropper to place drops of WATER on the penny (one at a time) until ANY amount of water runs over the edge of the penny. • 4. Record the number of drops for that trial in the table. B. Observation Questions: • 1. Explain your results from both parts of the experiment in terms of cohesion and surface tension. • 2. How do your results compare to the other groups in your class? Provide at least 2 possible reasons for any similarities and differences you identified.

  5. Explore- Investigate Station 3: Moving Molecules in a Solid A. Procedure • 1. Hold the ball in one hand and the ring in the other. • 2. Show students how the ball fits through the ring. • 3. Place the metal ball in the flame of a Bunsen burner for about 1–2 minutes • 4. Try to push the ball through the metal ring again. B. Observation Questions: • 1. How is the motion of the atoms in solid metal different from the motion of the molecules in liquid water? • 2. What is it about atoms and molecules in liquids and solids that keep them close to one another even though they are moving?

  6. Explore- Investigate Station 4: Volume Changes Demo A. Procedure • 1. Place the assembled test tube apparatus a beaker of warm water. Observe the colored water plug. • 2. Place the test tube apparatus in a beaker of ice water. Observe the colored water plug. B. Observation Questions • 1. What effect did the heat energy from the warm water have on the volume of air? • 2. What happened to the pressure on each wall of the test tube as you heated up the air?

  7. Explain- AnalysisofKinetic Theory • 1. All matter is made up of tiny particles (atoms, ions, or molecules). • 2. These small particles are in constant motion. • 3. All collisions between particles are perfectly elastic which means thatthere is no change in total kinetic energy. • Using the questions at each station and the above theory, describe what is occurring on a molecular level in each state of matter. • Describe what is happening to the particles of the substances you observed in the lab activities

  8. Evaluate- Foldable • Procedure: • 1. Students chose colored or white paper • 2. Hold lengthwise (hot dog) then cut only one side of the paper to make flaps • 3. Label the outside flap as follows: solid, liquid, and gas. Draw a representative picture or image on the outside of each flap. • 4. Open the flap and list at least 5 characteristics such as for a solid; shape, slow moving particles, close together, strong molecular attraction • 5. Repeat with the liquid and gas door comparing with solid • 6. Draw 4 dots : at the edge and at the bottom of each cut • 7. Draw the arrows indicating the process involved as temperature and KE increases.

  9. Evaluate - Questions • How will you describe a solid substance? Give some examples. • How will you describe a liquid substance? Give some examples. • How will you compare a solid to a liquid? • How will you describe a gaseous substance? Give some examples? • How will you compare solids to liquids and gases?

  10. Quiz- Fill in the table

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