Diffusion & Osmosis - Science - Year 8

The “Diffusion & Osmosis in Cells” worksheet for Year 8 Foundation Science explores key concepts in cellular transport. It begins with a fill-in-the-blank activity that explains diffusion as the movement of molecules from high to low concentration, using examples like tea in water and perfume in air. Students then find three new examples of diffusion and create simple diagrams to illustrate them. The worksheet continues with a matching exercise that defines osmosis, describing it as the movement of water through a membrane. It also examines osmosis in animal and plant cells, detailing how water moves in different conditions (hypotonic, isotonic, and hypertonic).

Classroom Usage:
Introduction:

Begin with a brief explanation of diffusion and osmosis, highlighting their importance in biological systems.
Guided Reading and Fill-in-the-Blank:

Students complete the paragraph on diffusion, using context clues to fill in missing terms. Discuss real-life examples to make the concept relatable.
Diagram Creation:

Encourage students to think of three additional examples of diffusion and illustrate them. This helps in visualizing the process and understanding its applications.
Matching Activity:

Students match parts of sentences related to osmosis, reinforcing their understanding of the process and its significance in animal and plant cells.
Reading and Completing Definitions:

Review the effects of hypotonic, isotonic, and hypertonic conditions on cells. Discuss why certain states are optimal for animal and plant cells, using diagrams to aid comprehension.
Interactive Experimentation:

Conduct a simple experiment, like observing osmosis with potato slices in different salt solutions, to provide hands-on understanding.