1. 14 / Wednesday
Kaupapa:
Describe the processes of changing physical states

2. Do you remember? Describe the particles in solid
Describe the particles in liquid
Describe the particles in gas

3. Which process is this?

4. Which process is this?

5. Which process is this?

6. Solid
Liquid
Gas

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.

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

11. Evaporation
Melting
Freezing
Condensation
Sublimation
Deposition

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

13. 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

15. Gallium

16. “Oobleck” – solid or liquid?

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

18. Evaporation

23. Condensation

27. Evaporation and Condensation
Practical:
Evaporation and Condensation

28. Sublimation
Solid
Gas
Deposition

29. Dry Ice

30. Practical: Iodine Crystals

36. What have we learnt today?
Give an example of sublimation
Give an example of deposition

37. Which process is this?

38. Which process is this?

39. Which process is this?