Osmosis and Cell
Name: ______________________________________ Date: ________________________
Student Exploration: Osmosis
Vocabulary: cell membrane, concentration, diffusion, dynamic equilibrium, osmosis, semipermeable membrane, solute, solvent
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. Suppose you were trapped on a desert island with no sources of fresh water. Should you drink water from the ocean? Explain why or why not.
_________________________________________________________________________
_________________________________________________________________________
2. What do you think would happen if you watered your houseplants with salt water?
_________________________________________________________________________
_________________________________________________________________________
Gizmo Warm-up
A cell membrane is a thin “skin” that surrounds a cell. It is a semipermeable membrane, which means that some particles pass through the membrane easily while others cannot.
The Osmosis Gizmo™ portrays a cell (red square) in a solution of purple solute particles dissolved in green solvent particles. Press Play ([pic]) and observe.
1. Which particles can pass through the cell membrane?
___________________________________________
2. Which particles cannot pass through the cell membrane? ___________________________
3. Click Reset ([pic]), and then click Play again. What do you notice about the size of the cell?
_________________________________________________________________________
|Activity A: |Get the Gizmo ready: |[pic] |
| |Click Reset. Set the Initial cell volume to 40%. | |
|Observing osmosis |You will need a calculator for this activity.
Student Exploration: Osmosis
Vocabulary: cell membrane, concentration, diffusion, dynamic equilibrium, osmosis, semipermeable membrane, solute, solvent
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. Suppose you were trapped on a desert island with no sources of fresh water. Should you drink water from the ocean? Explain why or why not.
_________________________________________________________________________
_________________________________________________________________________
2. What do you think would happen if you watered your houseplants with salt water?
_________________________________________________________________________
_________________________________________________________________________
Gizmo Warm-up
A cell membrane is a thin “skin” that surrounds a cell. It is a semipermeable membrane, which means that some particles pass through the membrane easily while others cannot.
The Osmosis Gizmo™ portrays a cell (red square) in a solution of purple solute particles dissolved in green solvent particles. Press Play ([pic]) and observe.
1. Which particles can pass through the cell membrane?
___________________________________________
2. Which particles cannot pass through the cell membrane? ___________________________
3. Click Reset ([pic]), and then click Play again. What do you notice about the size of the cell?
_________________________________________________________________________
|Activity A: |Get the Gizmo ready: |[pic] |
| |Click Reset. Set the Initial cell volume to 40%. | |
|Observing osmosis |You will need a calculator for this activity.