Kinetic Model of Matter

KINETIC MODEL OF MATTER

​By end of the lesson, you can

•describe the molecular structure of solids, liquids and gases;

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•describe how the motion of particles is affected by temperature.

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SOLIDS

​2. Motion

Particles vibrate about fixed positions.

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​1.Arrangement

Particles are closely packed together.

-High Density​

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​3.They are held in place by very strong attractive forces

​​-fixed volumes and shapes.

Open Ended

WHY DO SOLIDS HAVE A FIXED VOLUME AND SHAPE?

Fill in the Blank

SOLIDS HAVE HIGH DENSITY MEANS THEY ..........................................................

LIQUIDS

​1.Arrangement - Particles are slightly farther apart as compared to solids, and randomly arranged.

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​2.Motion- Particles are free to move about within the liquid.

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3.There are attractive forces between the particles.

​(Fixed ..................... but no fixed ......................................)

Open Ended

Liquids have fixed volumes and no fixed shapes means

Fill in the Blank

Liquids particles are slightly farther apart as compared to solids, and randomly arranged means they have .................................... density

​1.Arrangement -

Particles are very far apart, and randomly arranged. (LOW DENSITY)

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​2.Motion - Particles are free to move about at high speeds.

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3. NO FIXED VOLUME AND SHAPE : The attractive forces between the particles are very weak.

What happens to the motion of the particles when the temperature is changed?

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Regarding ..........................................Temperature increase or decrease

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Affecting speed of particles ............ Kinetic energy increase or decrease

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​Motion of particles.........................

air /liquid particles move faster or slower and will change direction

solid particles vibrate about its fixed position

​Summarize

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1 Arrangement

2 Motion

3 Fixed /No fixed volume or shape

4 Temperature affecting motion of particles ​