Ever wondered why your salad leaves go all limp and sad if you put the dressing on too early? As Lottie discovers to her dismay, she hasn't just ruined lunch—she's accidentally created a concentration gradient and dehydrated her lettuce!

In this episode of GCSE Science Unlocked, Lottie and Mr. H dive into Section 4.1.3.2: Osmosis. We unpack the exact, non-negotiable definition required by the exam board, walk through the essential Required Practical featuring the humble potato, and explain how plants use water pressure to stand up straight.

🎧 What You'll Learn in This Episode:

• The Exact Definition: Why water moves from a dilute solution to a concentrated one, and why forgetting to mention a "partially permeable membrane" will cost you the mark.
• The Potato Investigation: Ho ...