1. Particle model of matter
1. Introduction to the Particle Model and Internal Energy

2. Starter
In groups complete the card sort to revise kinetic theory from Year 9 chemistry…

3. Lesson Goals
Distinguish between solids, liquids and gases in terms of properties, behaviour and molecular structure.
Brownian motion as evidence for the molecular / kinetic theory.
To assess suitability of a model
Understand and explain internal energy

4. States Of Matter
Lesson Aims:
What are the differences between solids, liquids and gases if we look at a molecular level?
solid
liquid
gas

5. Kinetic Theory
Lesson Aims:
Matter is made of tiny particles which are constantly in motion. The particles attract each other strongly when close which reduces as the particles move further apart.

6. Properties 1 Solids: Shape and volume: Bonds: Particle movement: Fixed
Lesson Aims:
Solids: Shape and volume: Bonds: Particle movement:
Fixed
Strong forces of attraction between particles
Vibrate but do not change positions

7. Properties 2 Liquids: Shape and volume: Bonds: Particle movement:
Lesson Aims:
Liquids: Shape and volume: Bonds: Particle movement:
Fixed volume, takes shape of container
Weaker than solids although particles are close
Vibrations are vigorous so attractions not strong enough to hold in fixed position.

8. Properties 3 Gases: Shape and volume: Bonds: Particle movement:
Lesson Aims:
Gases: Shape and volume: Bonds: Particle movement:
Fill container
Virtually free of attractions between particles as far apart.
Move at high speed colliding with each other and walls of container.

9. States of Matter Lesson Aims: Solid Liquid Gas e.g. ________
Have a f_______ shape, do not flow
Can flow and take the s______ of container
_____ the container they are put in
Difficult to c_________
Easy to c________
P________ close together and f______ in place.
Particles close together but can m______ around
Particles _____ to move in any and all directions

10. How do we know that air exists?
Lesson Aims:

11. What evidence is there for kinetic theory
Lesson Aims:
Food colouring in water clip Brownian Motion

12. Using models in Science?
Lesson Aims:
Why do we use models?
What are the limitations of the particle model of matter?

13. Using models in Science?
Lesson Aims:
Why do we use models?
To help explain or describe the behaviour or solids, liquids or gases.
What are the limitations of the particle model of matter?
Particles are not actually solid spheres, Forces between the particles are not represented.

14. What is Internal Energy?
Lesson Aims:
What is Internal Energy?
Your turn to be the model…

15. Internal Energy
Lesson Aims:
Is the total kinetic and potential energy of all the particles (atoms and molecules) that make up a system
Temperature is a measure of the average kinetic energy of the particles.
Using your knowledge of the kinetic theory explain what happens to the internal energy of a system when it is heated.

16. Homework
Lesson Aims:

17. Answering long questions
Lesson Aims:
What command word is being used?
How many marks is the question worth?
What key physics terms do you need to use?
Don’t say ‘it’, (‘them’, etc) unless you have explained what ‘it’ is!
Check your spelling, punctuation and grammar.