PTE Speaking practice questions in the real exam format and timing.
Ocean currents transport heat from tropical regions towards the poles, playing a crucial role in regulating the global climate. Changes in these circulation patterns can trigger significant shifts in weather, affecting rainfall, temperatures, and the frequency of extreme weather events across entire continents.
Phytoplankton are microscopic organisms that drift near the ocean surface and produce approximately half of the world's oxygen through photosynthesis. Despite their tiny size, these organisms form the foundation of the marine food web and play a vital role in the global carbon cycle.
Ocean acidification occurs when seawater absorbs excess carbon dioxide from the atmosphere, lowering its pH level. This chemical change weakens the shells and skeletons of marine organisms such as oysters, mussels, and corals, threatening entire ecosystems that depend on these creatures for structure and food.
Coral reefs occupy a tiny fraction of the ocean floor yet shelter roughly a quarter of all marine species. That concentration makes them extraordinarily productive, and extraordinarily vulnerable, because damage in one small area removes habitat for a great many populations at once.
The deep ocean was long assumed to be nearly lifeless, since sunlight cannot reach it. The discovery of communities clustered around hot vents overturned that view: they draw energy from chemicals rising through the seabed rather than from the sun.
Khoa học biển: phát âm plankton, acidification. Đọc nhịp nhàng, nhấn số liệu.
Record 90 seconds. You get four criteria, the exact words that slipped, and your own sentence rewritten two levels up.