Osmosis

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Osmosis

Mr Theriault

Osmosis - A Voyage of Discovery

Part A

Click on Each of the Stops below (the underlined phrases) below and answer the following questions by clicking on the appropriate staement found at the Stop. Save all your work to a word processing document in your folder. Save as: Osmosis. Be sure to date your document, number each question and write in complete sentences.

Click on A Definition of Osmosis

1. What definition of osmosis is found here?

2. What are the 3 important aspects of this definition?

3. Has this defination changed in any way your understanding of osmosis?

Click on An Explanation of the Definition and read the explanantion.

1. After the 3 statements, what definition of osmosis is now given?

2. Which do you find the better definition, this one or # 1 above? Why?

Click on The Consequences of Osmosis in Plant Cells and answer the following questions:

1. What happens when plant cells take up water? Why don't they burst?

2. What happens when they are put in a dilute solution? This is called what?

3. What will eventually happen when the pressure rises in the cell? How can we see this in a garden?

Finally, click on The Consequences of Osmosis in Animal Cells and answer these questions:

1. Because animal cells do not have a cell wall, what can happen when they are places in a very dilute solution? What doesn't happen to them?

2. What happens to them in a concentrated solution?

3. What must animals on land or in the sea do?

4. What must animals that live in fresh water do?

5. What do you think would happen to each group of creatures (in #'s 4 and 5) if they were unable to do this?

Part B

Click on the link Stop below and complete the Activiites.

Activities # 1

Read the sections above each of the diagrams. Click the play button to activate the animation, if your computer is capable of this function.

Activity # 2

1. We again have a definition of osmosis. Now write a brief apragrapgh explaining the concept completely. Do this as if you were teaching this to someone who has never heard the word before.

2. What does the term Hypertonic Solutions mean?

3. What does the term Hypotonic Solutions mean?

Now read the last paragrapgh and answer this question.

1. What does the term Isotonic Solutions mean?

Stop

Part C

Define these terms in your own words; please do not cut and paste from a website although you may refer to the sites above to help you.

1. Osmosos

2. Turgid

3. Flacid

4. Concentrated solution

5. Dilute solution

6. Permeable

Finally, draw and paste in a cloured, labelled diagram showing a cell in a

1. Hypertonic state

2. Hypotonic state

3. Isotonic State

Be sure to refer to the Stop above to help you.