Diffusion Worksheets - Free Printables - Free Printable

Let's go through the Diffusion Review Worksheet step by step and solve each part with explanations.

---

1. Identify and name the phenomenon in the diagram below.

Diagram:
- Left box: Many particles clustered together (high concentration).
- Right box: Particles spread out evenly (low concentration).

✔ Answer: Diffusion

Explanation:
The diagram shows particles moving from an area of high concentration to an area of low concentration until they are evenly distributed. This is the definition of diffusion — the net movement of particles from a region of higher concentration to a region of lower concentration due to random motion, until equilibrium is reached.

---

2. Answer the following questions about diffusion and fill in the blanks.

#### a) Diffusion is the ________ movement of particles from a region of ________ concentration to a region of ________ concentration until ________ is established.

✔ Answer:
Random movement of particles from a region of high concentration to a region of low concentration until equilibrium is established.

Explanation:
Particles move randomly, but overall, there is a net flow from high to low concentration. This continues until the concentration is uniform throughout — this state is called equilibrium.

---

#### b) Give two everyday examples of diffusion.

✔ Examples:
1. Smell of perfume spreading across a room – when you spray perfume, the molecules diffuse through the air.
2. Sugar dissolving in tea or coffee – sugar molecules spread out in the liquid until evenly distributed.

Other valid examples:
- Smoke rising and spreading in a room
- Food coloring spreading in water

---

#### c) Diffusion is a type of ________ transport.

✔ Answer: Passive

Explanation:
Diffusion does not require energy (ATP). It occurs naturally due to the kinetic energy of particles and the concentration gradient. Therefore, it is a form of passive transport.

---

#### d) Diffusion continues until the concentration of the molecules becomes ________ throughout the region.

✔ Answer: equal (or uniform)

Explanation:
Diffusion stops when the concentration is the same everywhere — that is, equilibrium has been reached.

---

3. Draw the result of diffusion on the blank right panel.

We are given two initial states and need to draw how particles will be distributed after diffusion.

#### a)
Initial State:
- Top right: many particles (high concentration)
- Bottom left: few particles (low concentration)

✔ After diffusion:
- Particles should be evenly spread out across the entire space.
- No clustering; uniform distribution.

> 🔧 Drawing Instructions:
> In the blank box on the right, draw circles (particles) evenly scattered throughout the area, not clustered in one corner.

#### b)
Initial State:
- Two separate clusters: one large cluster on the left, one smaller cluster on the right.

✔ After diffusion:
- Particles will move from both clusters and spread out evenly.
- Final state: even distribution across the entire box.

> 🔧 Drawing Instructions:
> In the blank box on the right, draw particles spread uniformly, with no distinct groups.

---

✔ Final Answers Summary:

---

1. Phenomenon:

Diffusion

---

2. Fill in the blanks:

a) Diffusion is the random movement of particles from a region of high concentration to a region of low concentration until equilibrium is established.

b) Examples:
1. Perfume spreading in a room
2. Sugar dissolving in tea

c) Diffusion is a type of passive transport.

d) Diffusion continues until the concentration becomes equal throughout the region.

---

3. Drawings:

For both (a) and (b), the final result should show:
- Particles evenly distributed across the entire space.
- No clusters or dense areas.

> 🖼️ Sketch Description (for drawing):
> - Draw small circles (representing particles) spaced out uniformly across the box.
> - The number of particles should remain the same as in the original (just redistributed).
> - Avoid any grouping or clumping.

---

Let me know if you'd like a visual version of the drawings described!