Cette leçon contient 25 diapositives, avec quiz interactifs, diapositives de texte et 1 vidéo.
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Forces and Motion
Lesson 09.
Particles on the Move
Slide 1 - Diapositive
How are you today?
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Slide 2 - Sondage
Highlights of the Day
use the particle theory to explain pressure in gases and liquids (qualitatively only)
Values : Responsibility and Determination
Slide 3 - Diapositive
Review Quiz P2
Slide 4 - Diapositive
As with liquids, the pressure in a gas _____________ with depth.
A
decreases
B
increases
C
remains constant
Slide 5 - Quiz
____________ is height above sea level.
A
Altitude
B
Attitude
C
Latitude
Slide 6 - Quiz
Most people on Earth live at _______ altitude.
A
higher
B
lower
C
slower
Slide 7 - Quiz
The atmospheric pressure near sea level is __________ than that farther away from sea level.
A
higher
B
lower
C
slower
Slide 8 - Quiz
Sea level is where the atmosphere is at its "deepest". At sea level, atmospheric pressure is ___________.
A
zero
B
lowest
C
equal
D
highest
Slide 9 - Quiz
Think about...
Slide 10 - Diapositive
Questions
How can you smell food cooking when you are some distance away from the food?
When you pour orange juice into water, why does all the water eventually turn orange?
Slide 11 - Diapositive
Slide 12 - Diapositive
Slide 13 - Diapositive
gas particles
Slide 14 - Diapositive
The particles in a gas move randomly. Both the speed of the particles and the direction of the particles are __________.
A
constant
B
random
C
fixed
D
in one way
Slide 15 - Quiz
If we mix two gases in one container, each one will have particles that move randomly. That means each gas will _____________ to fill the container.
A
move in one direction
B
spread or scatter
C
evaporate
D
disappear
Slide 16 - Quiz
As you go higher in the atmosphere, the number of particles in of air ___________, so the concentration of gas particles decreases.
A
decreases
B
increases
C
remains constant
D
becomes zero
Slide 17 - Quiz
_____________ means the overall random movement of particles from an area where they are in "higher concentration" to an area where they are in "lower concentration".
A
Diffusion
B
Particle theory
C
Movement
D
Constant
Slide 18 - Quiz
Slide 19 - Diapositive
Slide 20 - Diapositive
phet.colorado.edu
Slide 21 - Lien
Speed of Diffusion
The speed of diffusion depends on: the difference in concentration of the particles and temperature.
Slide 22 - Diapositive
Slide 23 - Vidéo
Summary
Slide 24 - Diapositive
Self-survey: Rate your level of understanding and participation in this lesson.