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Worksheet: DIFFUSION
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Definition
> Diffusion is the
movement of molecules across the membrane from an area of
high concentration to an area of
low concentration until the concentration gradient is equalized. This process occurs
without the use of energy (passive transport).
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Word to Use:
-
equilibrium, low, energy, high, without movement
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Task 1: Draw the molecules on the right-hand side of the selectively permeable membrane, showing a lower concentration compared to the left-hand side.
Explanation:
- You are given a diagram with a membrane separating two sides.
- On the
left side, there are many molecules (say, circles) — this represents a
high concentration.
- The
right side should have
fewer molecules to show a
lower concentration.
- So, draw fewer circles on the right side than on the left.
✔ Goal: Show a
concentration gradient — more molecules on the left, fewer on the right.
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Task 2: Draw an arrow to show the direction of the concentration gradient.
Explanation:
- Molecules move
from high concentration to low concentration.
- So, the arrow should point
from the left side (high concentration) to the
right side (low concentration).
✔ Arrow direction: Left → Right
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Task 3: Now draw the molecules on both sides of the selectively permeable membrane to show that equilibrium has been reached due to diffusion.
Explanation:
- After diffusion, molecules will spread out evenly.
- At
equilibrium, the number of molecules on both sides is
equal.
- So, draw
the same number of molecules on both sides.
✔ Result: Equal distribution on both sides — no net movement.
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Key Concepts – Fill in the blanks
> Diffusion is an
passive process, meaning it does not require
energy.
> Molecules move from an area of
high concentration to an area of
low concentration until
equilibrium is reached.
> The movement occurs across selectively permeable membranes.
> This is a form of
passive transport.
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✔ Final Answer Summary:
1.
Initial State:
- Left side: Many molecules
- Right side: Fewer molecules
- Arrow: From left → right
2.
Equilibrium State:
- Equal number of molecules on both sides
- No net movement
3.
Key Concepts Filled In:
- Diffusion is a
passive process, meaning it does not require
energy.
- Molecules move from
high to
low concentration until
equilibrium is reached.
- Occurs across
selectively permeable membranes.
- A form of
passive transport.
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If you can upload the actual image or clarify any specific part (e.g., number of molecules to draw), I can give even more precise guidance!
Parent Tip: Review the logic above to help your child master the concept of diffusion and osmosis worksheet.
