4/6/2024 0 Comments Blue planet seas of life![]() On disc 2, "Open Ocean" takes viewers to the "desert" of the ocean: where predators and prey cruise in the depths, hundreds of miles from the nearest land, while "The Deep" explores life on the ocean floor. "Frozen Seas," also on disc 1, takes a look into the challenging habitats of the Arctic and Antarctic seas. While the discs are not numbered, it makes sense to watch them in order, starting with "Ocean World," an introduction to the complexities of the ocean and how the sun and moon shape the tides that, in turn, shape ocean life. The series is sold as four individual DVDs, each with two 48-minute episodes in this review, I'm treating them as a set, because if you like one of them, you will absolutely want to have them all.Įach of the nature documentary's eight episodes treats a different aspect of the ocean, amply demonstrating how much there is of interest in the water that makes up 70% of the Earth's surface. organic material from surface waters.The Blue Planet: Seas of Life, an eight-part BBC documentary on the world's oceans, has been given a fabulous transfer over to the DVD format, resulting in a documentary set that's not to be missed under any circumstances. sulfur-loving bacteria.(Nope, living organisms)Į. bioluminescent fish.(Not the sole reason for 'snow' collection at seabed) (Incorrect)ĭ. toxic waste and pollution.(Not pollution but organisms) (Incorrect)Ĭ. hydrothermal vents.(They are not the fallen bodies discussed) (Incorrect)ī. According to the passage, marine ""snow"" comes fromĪnalysis: According to the passage, Snow refers to the "dead plant and animal matter and wastes that have fallen from the surface waters over millions of years." Which is collected as sediments on Sea bed.Ī. explain why most sea creatures are unable to live at great depths.(The majority of population below terrestrial land consist of tube worm)(Incorrect) show how deep-sea organisms cope with extremely cold water conditions.(Tube worm lives near hot water source) (Incorrect)Į. describe an organism with large eyes and a keen sense of smell.(Nope, body structure is not a considerable factor in passage)(Incorrect)ĭ. support the claim that deep-sea organisms have made adaptations to their environment.(Correct)Ĭ. provide an example of a creature that lives near hydrothermal vents.(Partly true, but not the only reason)(Incorrect)ī. ![]() The author mentions tube worms in order toĪnalysis: Tube worm example is shown to discuss the non existent vaccum in their body which allows them to survive the environment under water.Ī. Scientific interest(not discussed)(Incorrect) Cost(Cost was never a determining factor in passage)(Incorrect)Į. Temperature(unstable temperature is present in space too)(Incorrect)Ĭ. Distance (Vast Distance is covered in space exploration too)(Incorrect)ī. It can be inferred from the passage that fewer people have traveled to the bottom of the ocean than to the moon primarily because of which factor?Īnalysis: The passage States that the reason behind the explorers not going on frequent exploration of sea is the lack of sunlight, unequally cold temperature, and water pressure dangerous enough to crush submarines.Īmong all 3, water pressure is the lethal factor, which is stopping explorers to limit their underwater travelling.Ī. As deep-sea exploration technology advances, scientists are learning more about the fascinating world of the abyss. For example, giant tube worms are creatures without eyes, mouths, or intestines, and they derive their energy from sulfur loving bacteria found in chemicals in the hot water around hydrothermal vents. Still other deep-sea marine organisms endure great pressure because they have no excess cavities. Some species have developed larger eyes to absorb available light, while others rely on highly developed olfactory senses to find their food. Many are bioluminescent, producing their own low-level light to lure prey or attract mates. Some organisms have made adaptations to their harsh environment. Deep-sea creatures sift through the mud for food or prey on fellow bottom dwellers. ![]() Surprisingly, life does exist in the abyssal plain. The ooze on the plain's surface is comprised of sediment and organic marine "snow," or dead plant and animal matter and wastes that have fallen from the surface waters over millions of years. The pressure is enormous, averaging between 200 to 600 times greater than at the surface-enough to crush submarines. The water there is cold-around 3 C (37.4 F). This large, flat ecosystem exists in perpetual darkness, as sunlight cannot penetrate to such depths. According to the BBC's The Blue Planet: Seas of Life documentary, "more people have traveled into space than have traveled to the deep ocean realm." The deepest of the ocean's life zones is the abyssal plain, ranging from 2,000 to 6,000 meters (1.2 to 3.7 miles) below sea level.
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