Particle Model

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Particle Model

• By
• Erick Grasley

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Rationale behind the Particle Model

• Inadequate ability of current teaching practices
  to allow the students to accomplish the
  following
• Lay necessary ground work of the particle for
  further applications.
• Understand the role of the particle in chemical
  and physical processes.
• Apply information to balance reactions beyond the
  rudimentary processes of memorizing pseudo
  mathematical patterns.

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Layout of Particle Model Unit
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Overview of the Particle Model Unit

• Establish necessary ground work for
  characteristics of the particle and its
  applications.
• Incorporate the particle to allow the description
  of the processes involved in a physical and
  chemical change.
• Allow students ample opportunities to apply
  knowledge and processes to a wide variety of
  tasks involving the particle in its different
  forms.
• Bridge all aspects of the particle together to
  allow the students to achieve a working
  understanding of chemical reactions.

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Introduction of the Particle

• The particle will be introduced using a series of
  demonstrations/activities these include
• Ethanol and Water in a tube
• Food Coloring in Water
• Diffusion of an Orange
• Thermal Expansion of Water
• Penny (attraction of particles)
• Syringe (compressibility)

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Applications of the Particle Model

• Phases
• Solid, liquid, and gas as it applies to the
  particle.
• The spacing and movement of particles in each
  phase.
• Physical Properties
• Characteristics of the particle associated with
  different phases and processes as they change
  from one to the other.
• Pictorial representation of particles during
  various physical changes.
• Develop a working understanding for density and
  how it applies to, or is affected by the particle.

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Applications of the Particle Model

• Chemical Properties
• Changing characteristics of the newly combined
  particles from new substances.
• Pictorial representation of particles during
  various chemical changes.
• Writing Formulas
• Bridge the gap between the particle (as just a
  random shape) to the chemical symbols preparing
  them to combine them together.
• Balancing Equations
• Final culmination of the particle model that
  allows the students to join all materials for
  understanding of proper balancing in respect to
  the particle and not just the numbers.

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Application Techniques for the Particle Model

• Demonstrations
• Allow for easy introduction of topics and ideas
  into the model.
• Introduction Demos
• Chemical Change Indicator Demo
• Labs
• Give students a chance to explore their way
  through materials to help lay basic ground work
  for the model or modify the model to fit a new
  situation.
• Physical Change and Mass
• Chemical Change and Mass
• Separation of Mixtures
• Waste B Gone
• Chemical Baggie
• Creating Models

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Application Techniques for the Particle Model

• Whiteboard Activities
• An application process that allows problems or
  situation to be presented to students in a way
  that will reinforce/challenge their previous
  knowledge.
• Help!!! What am I?
• Ranking Tasks for density and particle motion
• Jeopardy Question
• Worksheets
• A technique for quick check of understanding or
  to push for further building of knowledge with
  the students. Many examples are seen throughout
  this unit and many can be added depending upon
  your own objectives as teachers.

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Particle Model Unit Goals

• This unit will allow you to introduce a working
  model of the particle that your students can take
  with them and use in future classes.
• It will give your students opportunities to
  construct, understand, and apply the model they
  have set up.
• In the end this unit will help to alleviate many
  misconceptions they bring in, as well as,
  reinforce the knowledge that they will learn
  throughout.

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Particle Model Sampler

• Six Unit Activities Stations
• 1. Physical Change
• 2. Chemical Change
• 3. Physical vs. Chemical Changes
• 4. Help !!! What am I?
• 5. Create a Model and Balancing with the
  Particle Model
• 6. Jeopardy Question
• Each station will last for 10 minutes
• Complete as much of the activity as you can in
  given time.

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Questions?????

• ?