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Name ___________________________ Date_________ Class ________
Diffusion and Osmosis Worksheet
How are the molecules moving in the examples below (1-9)? Write OSMOSIS or DIFFUSION.
1. The student sitting next to you just came from gym class and forgot to shower and you can
tell. _____________
2. After sitting in the bathtub for hours, your fingers start to look like prunes. _________
3. The girl sitting two rows ahead of you put on too much perfume this morning._________
4. One way to get rid of slugs in your garden is to sprinkle salt on them, so they shrivel up.
____________
5. Yum! Something smells good. The neighbors are cooking on the grill! _____________
6. Gargling with salt water when you have a sore throat causes your swollen throat cells to
shrink and feel better. ________________
7. Oxygen molecules move from the air sacs in the lungs across the cell membranes into the
blood _____________
8. Robert sprays water on the veggies in the produce section to “plump them up”.________
9. You put raisins in a glass of water and they plump up. _____________
10. Use arrows to indicate the direction of diffusion in each case: is a molecule that can
pass through the cell membrane. is a cell membrane.
A) B)
11. For each of the situations below use an arrow to indicate the net movement of sugar into or
out of the cell. (Assume that the sugar molecules can pass through the cell membrane in
each case.)
1% sugar
5% sugar
3% sugar
1% sugar
1% sugar
1% sugar
Rachel Hurlbut Sept 3 Bio 10
Diffusion
Diffusion
Osmosis
Osmosis
Diffusion
Osmosis
Diffusion
Osmosis
Osmosis
