PARTICLE MODELBy:

Erick Grasley

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.

LAYOUT OF PARTICLE MODEL UNIT

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.

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)

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.

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.

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

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.

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.

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.

QUESTIONS?????

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