Final answer:
Oceans cover about 71% of the Earth's surface, not 50%. The oceans are a fundamental part of Earth's ecosystem, vital for biodiversity and humans, but face significant environmental threats.
Step-by-step explanation:
Oceans cover approximately 71% of the Earth's surface, not 50%. This makes the oceans the largest biome on the planet, and they play a crucial role in supporting a diverse range of life forms, regulating climate, and providing resources for humans.
Water, with its chemical formula H2O, is a life-giving natural resource that is essential for organisms on Earth. Notably, the human body is made up of 50-70% water. The vast majority of this water is contained in the oceans, which are saltwater environments. The oceans' influence extends beyond their coverage, affecting global ecosystems and the climate. Ensuring the health of ocean ecosystems is vital for maintaining biodiversity and the resources they provide.
Despite the oceans' size, they are not inexhaustible. They face multiple pressures, including overfishing, pollution, and habitat destruction, threatening marine life and the overall health of these ecosystems. Ocean conservation is therefore a critical issue that needs to be addressed to preserve the biodiversity and sustainability of oceanic life.