Name: ___________________________ Core: ______ Date



Cell Transport Unit: Performance Task

Everyday Examples of Diffusion or Osmosis Cartoon

You now know that diffusion is the movement of a substance (liquid or gas) from an area of higher concentration to one of lower concentration until the molecules are spread evenly throughout the entire area. Once the molecules are spread out fairly evenly, that is called equilibrium. Osmosis is the diffusion of water through a membrane.

Here’s an opportunity to show what you know about everyday examples of diffusion and osmosis!

Task: Draw a two-box cartoon of an example of diffusion or osmosis in everyday life on a half sheet of 11x17 inch paper. (You will be supplied with the paper.) You may use more boxes if you wish. You must show the source of the diffusing agent and the results. Tech Option: You may create a cut-and-paste collage using computer clip-art to create your cartoon.

Each cartoon MUST include the following components.

1. Dialogue bubbles/balloons to show how the character (or characters) feels or responds during the scenes represented in the cartoon.

2. Captions to explain the action in the cartoon. Be specific about the process of diffusion or osmosis. Use the vocabulary you have learned in class. Be sure to mention and define the process you are illustrating.

3. Representations of molecules in areas of higher and lower concentration

4. Action lines or arrows showing the movement of molecules.

5. Identification of the movement of molecules as diffusion or osmosis.

6. Color to make the “action” show up better. (If you are really interested in creating a pencil or pen drawing you may, but be sure to create a fairly sophisticated cartoon. Stick figures are not acceptable.)

Ideas for the cartoons: Choose one of the following or create your own scenario.

1. You are on an elevator. An individual who has just been smoking a cigar gets on at the third floor. You are in a very tall building and the person says "Hey, we're both going to the 62nd floor!" Disliking the smell you move to the farthest corner you can, but there is no escape.

2. You are sitting in class preparing for a lesson when a classmate arrives – heavily doused with perfume. You don’t like the smell, and it’s overpowering.

3. Our ancient ancestors knew that “curing” meat with salt preserved it for many months – without refrigeration. Today, you can eat cured meats too – like beef jerky.

4. You’re in your room studying for a big science test. Your little sister is downstairs with a bunch of friends baking YOUR FAVORITE COOKIES!

5. Last spring the landscaper planted several young trees along the sidewalk in front of your house. They had really pretty white flowers on them, and you and your parents were looking forward to the shade they would provide when they got larger. Then came a cold, snowy winter. A lot of salt was used on the icy roads. When spring finally arrived some of the trees were dead!

6. You and your friend are playing video games at his house. Your friend’s mom begins to cook liver and onions for dinner. You don’t like liver and onions.

7. On a warm summer night, a skunk is killed on the corner of your street – about 2 houses away. You’re at home watching TV. A few minutes after the skunk was killed you can smell it in your house. The smell is overwhelming. It even burns your nose.

8. You’ve just had a lot of salty foods – popcorn, pickles, and pepperoni pizza. You’re really thirsty.

9. While enjoying your favorite TV show, you catch a whiff of freshly popped popcorn coming from the kitchen. The smell of the popcorn is irresistible.

10. It’s a warm summer morning. You wake up to the sound of a lawnmower’s loud hum in your neighborhood. You step outside, and you can smell the fragrance of freshly mown grass from somewhere in the neighborhood.

11. Your friend has a favorite brand of shampoo. You always know when he’s around – even if you don’t see him because you recognize the fragrance of the shampoo he uses. One day he comes into class and sits behind you. You don’t see him, but you know he’s there.

12. You’re dad sends you into Starbuck’s for a coffee. He likes cream in it. The barista gives you the coffee, and you stop by the milk and cream table before you leave to add the cream. There are no stirrers left. You pour in the cream and replace the top. You are confident that the coffee will be just the way your dad likes it when he takes the first sip – even though you didn’t stir it.

13. Before frying, your mother likes to soak raw potatoes cut up for fries in cold water. She says it makes her fries very crisp. You’ve always liked the way your mother makes fries.

14. Aunt Millie takes the cucumbers that she grows in her garden and makes them last all winter – as pickles. The fresh cucumbers are soaked in salty water and spices. They taste delicious – but not like cucumbers.

15. Slugs are eating all the lettuce in your neighbor’s garden. You’ve recently learned that salt sprinkled on slugs will kill them. You tell your neighbor and his garden is now a slug-free zone!

Due date: _____________________

Cartoon Component Checklist:

❑ Dialogue bubbles/balloons to show how the character (or characters) feels or responds during the scenes represented in the cartoon.

❑ Captions to explain the action in the cartoon. Be specific about the process of diffusion or osmosis. Use the vocabulary you have learned in class. Be sure to mention and define the process you are illustrating.

❑ Representations of molecules in areas of higher and lower concentration

❑ Action lines or arrows showing the movement of molecules.

❑ Identification of the movement of molecules as diffusion or osmosis.

❑ Color to make the “action” show up better. (If you are really interested in creating a pencil or pen drawing you may, but be sure to create a fairly sophisticated cartoon. Stick figures are not acceptable.)

|Picture: Show diffusion or osmosis occurring. |Picture: Showing the results of the diffusion or osmosis. |

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|Caption: Explaining the action. Be specific. You must explain what is |Caption: Explaining the results of diffusion or osmosis taking place. |

|happening with regard to diffusion or osmosis. | |

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