1. Earth’s Structure & Plate Boundaries | Identifying Earth′s layers, plate boundary types, causes of volcano formation, and tsunami effects on marine ecosystems. 2. Marine Ecology & Food Chains | Defining community, habitat, and population; trophic levels in food chains; biotic factors affecting shark populations. 3. Ocean Zones & Gas Concentrations | Oxygen levels in ocean layers, carbon dioxide fluctuations, adaptations of deep-sea fish to environmental conditions. 4. Cell Structure & Marine Plants | Identifying plant cell components, comparing plant and dinoflagellate cells, functions of seagrass structures. 5. Mangroves & Oil Extraction | Importance of mangrove forests, oil spill mitigation, impact of climate change on estuaries. 6. Water Cycle & Marine Pollution | Evaporation differences in polar vs. tropical regions, nutrient cycling, plastic pollution effects on marine ecosystems. 7. El Niño & Climate Effects | Causes of El Niño, its global effects, and environmental impacts. 8. Bluefin Tuna Migration | Identifying migration routes, differences between seas and oceans, reasons and adaptations for migration.