1. Lesson 049 Learning Goal: (You should be able to…)
Explain how matter changes from one state to another.
Success Criteria: (Can you …)
Complete the organizer about phase change

2. How to organize lesson 049
The lessons Agenda was: MC SA Balloon Phase change and H2O

3. Vocabulary Solid Liquid Gas Plasma Element Compound
Homogeneous mixture
Heterogeneous mixture

4. Write To Think 049 Log in and then …
Answer the following on lined paper…
List FIVE STATES of matter in order of intermolecular forces, WEAKEST first!
What are the significant differences between a solid and a liquid? (At least 3!)
If the particles in a liquid are free to move about … why don’t they escape like a gas?
What’s the difference between a gas and plasma?

5. MC Answers 1 D 2 C 3 C 4 A 5 B 6 B 7 B 8 B 9 C 10 A 11 A 12 C 13 D
13 = 4
10, 11, 12 = 3
6, 7, ,8 ,9 = 2
5 OR LESS = 1

6. SA Written Responses Feedback
Explain why salt water can be described as homogeneous mixture.
Because it’s a mixture and it’s the same.
Salt water is made by adding a solid compound (salt) to a liquid compound (water) and stirring. The salt will ‘disappear’ in the water and become mixed. It can become homogenous if it’s mixed enough so that all the parts of the mix are almost identical to each other. It could even be made into a solution!
The salt and water can be easily separated (from the mixture) by evaporating the water, leaving the salt, which is why it’s a mixture and not a new chemical (NOT combined, JUST mixed).

7. SA Written Responses Feedback
Explain each scientific term
Elements (Aluminum, gold etc.) are NOT chemically combined
Gases have an ‘indefinite or easily changed volume’ NOT ‘no volume’!
ALL mixtures (hetero, homo, soln.) are easily separated.

8. Phase Change Diagrams
During the process of heating or cooling a substance, a material's temperature will either increase (in the case of energy being added to the system) or decrease (in the case of energy being removed from the system).  
Thermal (Heat Energy)
Thermal (Heat Energy)

9. Phase Change Diagrams
During the process of heating or cooling a substance, a material's temperature will either increase (in the case of energy being added to the system) or decrease (in the case of energy being removed from the system).  
Thermal (Heat Energy)
Thermal (Heat Energy)

10. Phase Change Diagrams
Since this happens over a period of time, we can easily graph temperature vs. heating time and come up with something known as a phase change diagram.

11. Gas (Water Vapor) Liquid (Water) Solid (Ice) Heating Time Phase Change

12. Phase Change Diagrams
However this diagram I just showed you is oversimplified. In actuallity a phase change diagram looks like this…

13. Heating Time Beginning of Phase Change
End of
Phase Change
End of
Phase Change
What are those horizontal lines? What is happening there?
gas
boiling
liquid
melting
solid
Why isn’t the temperature increasing during the phase changes? Think particles!
Heating Time

14. Heating Time Beginning of Phase Change gas boiling liquid melting
End of
Phase Change
End of
Phase Change
gas
boiling
liquid
melting
solid
Heating Time
Particles increasing in movement
Intermolecular forces being broken
Particles increasing in movement
Intermolecular forces being broken (particles escaping into gas)
Particles increasing in movement

15. COOLING TIME Beginning of Phase Change gas condensing liquid freezing
End of
Phase Change
End of
Phase Change
gas
condensing
liquid
freezing
solid
COOLING TIME
Particles decreasing in movement
Particles decreasing in movement
Intermolecular forces being formed
Intermolecular forces being formed
Particles decreasing in movement

19. Why do you think if we get passed the vaporization stage?

20. Phase Change Graphic Organizer
are for terms.
are for definitions of terms in your own words.
one example of phase or type.
Example:
Description of Particles
Where you describe what is happening to the particles in each direction.

21. End of lesson
Slides after this are for teacher use if needed but were not a part of the lesson.

22. Multiple Choice Answers
Matter that is a gas will
have a definite volume.
have a definite shape.
be colorless.
take up any shape it is put into and as much space as possible.

23. Multiple Choice Answers
2. If each sphere represents an atom and shades represents different types this would be an example of a(n)
element
compound
mixture
solid

24. Multiple Choice Answers
4. Aluminum (Al) is an example of an
element
compound
homogenous mixture
heterogeneous mixture

25. Multiple Choice Answers
3. If the label of a product indicates that the product has multiple ingredients in it, that suggest that the product is a(n)
element
compound
mixture
None of the above

26. Multiple Choice Answers
4. A solid is a state of matter that has a(n)
indefinite volume and an indefinite shape.
definite volume and a definite shape.
definite volume and indefinite shape.
indefinite volume and definite shape.

27. Multiple Choice Answers
5. This image shows particles of a
liquid
solid
gas
compound

28. Multiple Choice Answers
6. Water vapor (hydrogen and oxygen chemically joined to make something different) is an example of a(n)
element
compound
mixture
precipitate

29. Multiple Choice Answers
7. If each sphere represents an atom and shades represents different types this would be an example of a(n)
element
compound
homogenous mixture
heterogeneous mixture

30. Multiple Choice Answers
8. All mixtures are
the same throughout.
reasonably easy to separate.
made of multiple types of compounds chemically joined together
made of multiple types of elements physically mixed together.

31. Multiple Choice Answers
9. Water H20 and salt NaCl mixed together thoroughly is an example of a(n)
element
compound
homogenous mixture
heterogeneous mixture

32. Multiple Choice Answers
10. This image shows particles of a
liquid
solid
gas
compound

33. Multiple Choice Answers
11. How does liquid water, ice (solid), and water vapor (gas) differ from each other?
they are different states or phases.
they are different compounds.
they are made of different kinds of elements.
they are different chemicals.

34. Multiple Choice Answers
12. If each sphere represents an atom and shades represents different types this would be an example of
elements
compounds
a homogenous mixture
a heterogeneous mixture

35. Multiple Choice Answers
13. The difference between a heterogeneous mixture and a homogenous mixture is that
a heterogeneous mixture is easily separated and a homogenous mixture is not.
a homogenous mixture is easily separated and a heterogeneous mixture is not.
heterogeneous mixture is not the same everywhere and a homogenous mixture is.
homogenous mixture is not the same throughout and a heterogeneous mixture is.

36. Multiple Choice Answers
14. A sample like play-dough that changes shape when forced is an example of a
solid.
liquid.
gas.
all of the above.

37. Multiple Choice Answers
15. If each sphere represents an atom and shades represents different types this If each sphere represents an atom and shades represents different types this would be an example of a(n)
element
compound
homogenous mixture
heterogeneous mixture

38. Multiple Choice Answers
17. A sample that exists on the periodic table is a(n)
element
compound
mixture
gas

39. Multiple Choice Answers
18. This image shows particles of a
liquid
solid
gas
compound

40. Multiple Choice Answers
19. Examples of different type of matter are
solid, liquid, gas
solid, compound, mixture
element, compound, gas
element, compound, mixture

41. Multiple Choice Answers
20. Toothpaste is an example of a
solid compound
liquid mixture
solid element
liquid element

43. Score in Gradebook. 20 = 4 19 = 3.5 17-18 = 3 15 – 16 = 2.5 13-14 = 2
11-12 = 1.5
Below 11 = 1