1. 13 / Tuesday
Kaupapa:
Describe the properties of solids, liquids and gases using particle diagrams

2. Do you remember?
Describe the evidence that supports the particle theory

3. Solid
Liquid
Gas

4. Particles in a solid – animation

7. Solid Liquid Gas Particles hold each other strongly.
They are only a little active.
Particles hold each other very weakly.
They are somewhat active.
Particles are far apart from each other.
They are very active.

8. How can we change the physical state?
Question:
How can we change the physical state?

10. Evaporation
Melting
Freezing
Condensation
Sublimation
Deposition

11. Solid Liquid Melting Freezing The particles are separated out
The particles are brought closer together

12. Water / Ice Chocolate 35 Wax 50 Lead 327 Gold 1060 Diamond 3550
Substance
Melting Point (oC)
Water / Ice
Chocolate 35
Wax 50
Lead
327
Gold
1060
Diamond
3550
Mercury
-39
Gallium 30

14. Gallium

15. Liquid Gas Evaporation Condensation
The particles are completely separated out
Condensation
Gas
The particles are brought closer together

16. Evaporation

21. Condensation

25. Evaporation and Condensation
Practical:
Evaporation and Condensation

26. How else can we change the state?
Extension Question:
How else can we change the state?

28. Liquefied Gas!

29. Liquid Nitrogen

30. “Oobleck” – solid or liquid?

31. What have we learnt today?
Describe the particles in solid/liquid/gas

32. Which process is this?

33. Which process is this?

34. Which process is this?