EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Oceanic plates are moving apart.
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The density of the oceanic plates is decreasing.
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Increased air temperatures are increasing evaporation.
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Trenches are formed by oceanic plates sliding under continental plates.
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Detailed explanation-1: -The Atlantic Ocean grows 1.5 inches wider every year. That’s because the tectonic plates undergirding the Americas are separating from those beneath Europe and Africa.
Detailed explanation-2: -It was once much wider when all the continents were joined together in the supercontinent, Pangea. The Pacific ocean basin is getting smaller because the Atlantic Ocean is opening and North America and South America are moving westward. Most of the Pacific Ocean is underlain by the Pacific plate.
Detailed explanation-3: -These days, the Atlantic Ocean is growing at a rate of five centimetres per year, as new sea floor is created by volcanic activity along its mid-ocean ridge. On the other hand, the much older Pacific Ocean is currently estimated to be shrinking by two to three centimetres each year.
Detailed explanation-4: -Scientists have long known that the tectonic plates beneath North and South America are moving apart from those beneath Africa and Asia, widening the Atlantic Ocean at a rate of about 1.5 inches a year, Business Insider explained.
Detailed explanation-5: -Because of seafloor spreading and the movement of the ocean floor and of the continents outward from the ridge, the Atlantic Basin is widening at an estimated rate of 1 to 10 cm (0.5 to 4 inches) a year.