1. Osmosis and Diffusion Passive Transport

2. Osmosis and Diffusion
Terms and definitions

3. Do Now Word: Diffusion Definition: Example: Picture: Word: Osmosis
Copy the following in your science journal Use the whole page
Word:
Diffusion
Definition:
Example:
Picture:
Word:
Osmosis
Definition:
Example:
Picture:

4. Osmosis and Diffusion
1.Diffusion - the process by which molecules spread from areas of high concentration, to areas of low concentration

5. Osmosis and Diffusion 1.Diffusion
eventually spreading out evenly into the available space

6. Pair Share
See if you and your partner can come up with 3 real world examples of diffusion
Write one of them (or another classmate’s) in your Freyer’s model and sketch a picture

7. Osmosis and Diffusion
Several factors can affect the rate of diffusion……
One such factor is temperature
Higher temperatures tend to increase the rate of diffusion

8. Osmosis and Diffusion 2.Solutes- a substance dissolved in fluid
Ex: Salt is a solute, when it is concentrated inside or outside the cell, it will draw the water in its direction
This is also why you get thirsty after eating something salty

9. Osmosis and Diffusion
3.Solvent - is a liquid, solid, or gas that dissolves another solid, liquid, or gaseous solute
resulting in a solution

10. Osmosis and Diffusion
Osmosis A specialized type of diffusion is the movement of a solvent (frequently water) through a semi-permeable membrane
Osmosis is a type of a process where a fluid passes through a semipermeable membrane and moves from an area where a solute is present in low concentrations to an area where a solute is present in a higher concentration

11. Osmosis and Diffusion In the real world……….
In humans, osmosis occurs in the kidneys to recover the water from waste materials of the body. The kidneys regulate the concentration of water in the blood plasma.
Kidney dialysis
What other organs/organelles
are responsible for filtering
(allowing some things through
but not others)?

12. Osmosis and Diffusion In the real world
In plants, osmosis occurs for example at root hairs, allowing the uptake of water from the soil.

13. Osmosis
Ameoba Sisters: Osmosis and Diffusion
Osmosis is a type of a process where a fluid passes through a semi-permeable membrane, from a higher concentration of water to a lower concentration of water

14. Ameoba Sisters Answers

15. Do Now
Write down two examples of real life diffusion in you science journal
Or else…

16. Gummy Bear Lab Before you look at your gummy bear, make sure you have:
Written your prediction on the first page of your lab packet
Recorded your measurements on the second page
Height and width should be in millimeters
Weight should be in grams
Once you get your gummy bear, complete steps 8 and 9 of the Procedure

17. Do percent problems last
Grams
Millimeters

18. Do Now Fill in the blanks (write out the sentences):
Diffusion occurs when particles flow from an area of ________concentration to ________concentration
Osmosis occurs when ___________ is involved, and it passes through a semi-___________ barrier.

19. www.phschool.com/science/biology_place/labbe nch/lab1/concepts.html
integrativebiology.okstate.edu/zoo_lrc/biol1114/tu torials/Flash/Osmosis_Animation.htm
raphics/diffusion2.gif
0/animations/membrane_transport/membrane_tra nsport.htm

20. Diffusion Webquest Go to the following website
hallihanscienceclass.weebly.com/
Click on the Diffusion Webquest near the bottom of the page
This will allow you to click on the links for questions 2, 3, 4, 8
If you finish early, go back and check over/finish your gummy bear lab

21. Do Now Draw a picture to represent the following: Diffusion Osmosis
Semi-permeable barrier
Concentration (high and low)

22. Osmosis Lab
After you place the baggie in the cup, answer questions 6-7

23. Matching
Match the 8 words with their corresponding definition/examples
Raise your hand when you think you’re done

24. Osmosis Lab
Answer the rest of the questions, and if you finish early, complete your four pictures from the beginning of class

25. Osmosis and Diffusion
Hypotonic Solutions:
contain a low concentration of solute (more water)
When a cell is placed in a hypotonic solution, the water diffuses into the cell, causing the cell to swell 
Hint : po boy sandwich

26. Osmosis and Diffusion
Hypertonic Solutions:
contain a high concentration of solute (less water)
When a cell is placed in a hypertonic solution, the water diffuses out of the cell, causing the cell to shrivel
Hint: Hyper kids

27. Osmosis and Diffusion ( equal amounts of water)
Isotonic Solutions: contain the same concentration of solute
( equal amounts of water)
When a cell is placed in an isotonic solution, the water diffuses into and out of the cell at the same rate
The fluid that surrounds the body cells is isotonic