1. How were you able to smell the perfume?

2. Movement of Substances
Diffusion
Osmosis

3. Diffusion

4. 3 particle states of matter
Lets Recap…
3 particle states of matter
What is the particle arrangement and motion?
Diffusion
Solid
Liquid
Gas

5. Diffusion Definition: 1)The net movement of particles
2)from a region of higher concentration
3)to a region of lower concentration
High concentration
Low concentration

6. Diffusion in liquid state
: Ink dye
: Water molecules

7. Diffusion in liquid state
: Ink dye
: Water molecules

8. Diffusion in gaseous state
: Perfume molecules
: Air molecules

9. Diffusion in gaseous state
: Perfume molecules
: Air molecules

10. Net Movement
Note: This barrier does not illustrate a partially permeable membrane.

11. Net Movement

12. Equilibrium
When particles reaches an equilibrium, does the particles stop moving?
Hint: Particles move in a random and dynamic motion.

13. Examples Movement of substances in and out of amoeba cells
Movement of CO2 and O2 in and out of lung cells
Movement of nitrates in and out of root hair cells

14. Can you think of any other diffusion that happens in your daily life?

15. What will happen to the eggs?
Concentrated sucrose solution
What will happen to the eggs?
Is this diffusion? If not what is this process called?

16. Movement of Substances
includes
Osmosis
Diffusion
definition
Net movement of particles from a region of high concentration to a region of low concentration, down the concentration gradient.
Key Ideas:
1) Liquid/ Gas particles move from region of high concentration to low concentration
2) Movement of particles is random and dynamic in equilibrium (net)
3) Examples of diffusion

17. Osmosis

18. Osmosis Definition: The movement of water molecules
through a partially permeable membrane
from a solution of high water potential,
to a solution of lower water potential.
: sucrose
:water molecules
Partially permeable membrane

19. Partially Permeable Membrane
Allows some substances to pass through but not others.
Eg: Cell membrane in plant and animal cells.
Allows both the solvent (water) and the solutes ( dissolved substances to pass through)
Eg: Cell Wall of plant cells

20. The movement of water molecules through a partially permeable membrane
Only water molecules passes through the partially permeable membrane (sucrose solution too big to pass through the partially permeable membrane).
: sucrose
:water molecules
Partially permeable membrane

21. Osmosis in living organisms
Animal Cells
Plant Cells
Plant cell behaves differently from animal cell when placed in solutions with differing water potentials.
Due to presence of cell wall in plants.

22. Osmosis in plant cell
Fully permeable: allows most dissolved substances to pass
through
Cell surface membrane is a partially permeable membrane

23. Plant cell in High water potential
Cell vacuole has lower water potential compared to solutions outside cell
Water enters cell by osmosis.
Vacuole increases in size, pushes against cell wall
Cell wall exerts opposing pressure
Plant cell expands

24. Osmosis in living organisms
Animal Cells
Plant Cells
Plant cell behaves differently from animal cell when placed in solutions with differing water potentials.
Due to presence of cell wall in plants.

25. Animal cell in High water potential
Cytoplasm has lower water potential compared to solution outside cell
Water enters by osmosis
Animal cell will swell and may bursts as it does not have a cell wall to protect it.

26. Movement of Substances
includes
Osmosis
Diffusion
Active Transport
definition
definition
The movement of water molecules through a partially permeable membrane from a solution of high water potential, to a solution of lower water potential.
Net movement of particles from a region of high concentration to a region of low concentration, down the concentration gradient.
Opposites!
Key Ideas:
Key Ideas:
1) Liquid/ Gas particles move from region of high concentration to low concentration
2) Movement of particles is random and dynamic in equilibrium (net)
3) Examples of diffusion
1) Only water molecules
2) Partially permeable membrane
3) High water potential to low water potential
4) Osmosis in living cells

27. Movement of Substances
includes
Active Transport
Osmosis
Diffusion
definition
definition
definition
The movement of water molecules through a partially permeable membrane from a solution of high water potential, to a solution of lower water potential.
Net movement of particles from a region of high concentration to a region of low concentration, down the concentration gradient.
Energy is used to move particles against concentration gradient ( from a region of low concentration to a region of higher concentration) , up a concentration gradient.
Key Ideas:
Key Ideas:
Key Ideas:
1) Liquid/ Gas particles move from region of high concentration to low concentration
2) Movement of particles is random and dynamic in equilibrium (net)
3) Examples of diffusion
1) Only water molecules
2) Partially permeable membrane
3) High water potential to low water potential
4) Osmosis in living cells
1) Requires energy
2) From low to high
3) Only in living cell
4) Active transport in living cells