Leaves - Presentation

The presentation on leaves delves into the remarkable functions and features of leaves in the plant kingdom. Students are set to learn about the dual surfaces of a leaf, the location and role of stomata, and the varying characteristics of leaves from different plant species. The lecture at the Royal Institute, attended by Sammy and Anvi, reveals how leaves perform the vital process of photosynthesis, converting sunlight, carbon dioxide, and water into glucose, which is then turned into starch for storage. The top surface of the leaf plays a key role in food production, while the underside houses thousands of stomata, which are crucial for gas exchange and water regulation within the plant. The presentation also touches upon the diversity of leaf shapes and sizes that are influenced by the plant's species and habitat.

Practical activities complement the lecture, offering students hands-on experience with microscopes to examine leaf structures, such as stomata. They learn how to prepare and observe specimens, focusing on the topography of a leaf at different magnifications. Additionally, experiments involving cobalt chloride paper demonstrate the presence of water in leaves, and investigations with petroleum jelly help determine which side of a leaf loses more water vapour. The session also explores the defensive role of spikes on holly leaves, which protect against herbivores. By the end of the presentation, students are expected to understand the differences between leaf surfaces, describe the function and location of stomata, and articulate the variations among leaves from diverse plant species, ultimately enhancing their botanical knowledge.