Osmosis and Diffusion Worksheet
Grade 9 Science worksheet covering the principles of osmosis, diffusion, and their importance in biological systems.
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Osmosis and Diffusion Worksheet
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Read each question carefully and answer to the best of your ability. Diagrams are provided to assist you where applicable.
1. Which process involves the movement of water molecules across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration?
Diffusion
Osmosis
Active Transport
Facilitated Diffusion
2. Which of the following factors would increase the rate of diffusion?
Decreased temperature
Larger particle size
Increased concentration gradient
Thicker membrane
3. The cell membrane is , meaning it allows some substances to pass through while blocking others.
4. Diffusion is the net movement of particles from an area of concentration to an area of concentration.
5. Osmosis is a type of active transport.
True
False
6. Both osmosis and diffusion require energy from the cell to occur.
True
False
7. Describe the key difference between diffusion and osmosis.
8. Explain what would happen to a plant cell if it were placed in a hypertonic solution. Use the diagram below to aid your explanation.
Match each term on the left with its definition on the right.
9. Isotonic solution
a. Solution with a lower solute concentration than the cell
10. Hypertonic solution
b. Solution with the same solute concentration as the cell
11. Hypotonic solution
c. Solution with a higher solute concentration than the cell
Use the words below to complete the sentences.
12. Diffusion and osmosis are both types of transport.
13. When the concentration of a substance is uniform throughout a space, it has reached .
14. In a solution, the substance that dissolves is called the .