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3.3 Phase Change
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Slide 1:
Tekstslide
Natuurkunde
Middelbare school
vwo
Leerjaar 2
In deze les zitten
24 slides
, met
interactieve quizzen
,
tekstslides
en
2 videos
.
Lesduur is:
45 min
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Onderdelen in deze les
Slide 1 - Tekstslide
Plan for today
1. Testing your knowledge
2. Phase changes/transitions
3. Working on the exercises
Slide 2 - Tekstslide
Which one of these is NOT
a phase?
A
Water
B
Gas
C
Liquid
D
Solid
Slide 3 - Quizvraag
True or false:
Water vapour is invisible.
A
True
B
False
Slide 4 - Quizvraag
True or false:
A thermometer works because
ethanol shrinks as the temperature increases
A
True
B
False
Slide 5 - Quizvraag
If we are heating up a block of ice, from what temperature will it start to melt?
A
-10 °C
B
0 °C
C
10 °C
D
1 °C
Slide 6 - Quizvraag
In which phase has molecules the less freedom of movement?
A
Gas phase
B
Solid phase
C
Liquid phase
Slide 7 - Quizvraag
What is the name for the attractive force between molecules of same substance?
A
adhesion
B
cohesion
Slide 8 - Quizvraag
In the image you can see a representation of the particle model of a certain substance.
At what stage is this substance?
A
The gas phase
B
The solid phase
C
The liquid phase
Slide 9 - Quizvraag
In the image you can see a representation of the particle model of a certain substance.
At what stage is this substance?
A
The solid phase
B
The liquid phase
C
The gas phase
Slide 10 - Quizvraag
Learning objectives
1. You can name the 6 phase changes.
2. You can describe the phase changes in the particle model.
3. You can name and recognize real-life examples of the phase changes
Slide 11 - Tekstslide
Phase transitions
Slide 12 - Tekstslide
Slide 13 - Video
Slide 14 - Video
Temperature and movement
The higher the temperature the faster the particles move.
If they move faste enough then they can escape.
Below, you can see this happening when water starts evaporating.
Slide 15 - Tekstslide
Boiling
The process by which evaporation occurs
anywhere
in the liquid.
Slide 16 - Tekstslide
Water is special
Water is smallest at 4 degrees Celsius.
This is due to its crystal structure.
Slide 17 - Tekstslide
Crystal structure of water
Slide 18 - Tekstslide
Which phase transition you see in the picture?
A
Evaporation
B
Melting
C
Condensation
D
Freezing / Solidification
Slide 19 - Quizvraag
Fog occurs when a lot of water droplets are suspended in the air. After a clear day, fog suddenly appears
What can you say about the temperature?
A
It has turned colder
B
The temperature has stayed the same
C
It has turned warmer
Slide 20 - Quizvraag
Water expands when it is heated
Why?
A
The distances between the molecules become greater
B
More water molecules are being added
C
the distances between the molecules become smaller
Slide 21 - Quizvraag
Which phase transition belongs to this sentence:
The rice is cooked completely dry.
A
Evaporation
B
Melting
C
Condensation
D
Freezing / solidification
Slide 22 - Quizvraag
7) Match correct descriptions with each phase transition.
from gas to liquid
from solid to liquid
from solid to gas
from liquid to solid
from liquid to gas
from gas to solid
solidification
melting
evaporation
condensation
deposition
sublimation
Slide 23 - Sleepvraag
Homework
Chapter 3 section 3
Assignments: 1 till 7
Slide 24 - Tekstslide
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