Answer:
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Explanation:
When continental and oceanic plates collide, the thinner and more dense oceanic plate is overridden by the thicker and less dense continental plate. The oceanic plate is forced down into the mantle in a process known as "subduction." As the oceanic plate descends, it is forced into higher temperature environments.
Answer: Weathering is the breaking down of rocks and minerals on the surface of Earth. Weathering is divided into two types, mechanical and chemical.
Explanation: One of the causes for mechanical weathering is water, either liquid or solid. A cause for chemical weathering is rain water. Rain water reacts with mineral grains in rocks to form new minerals.
Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Several types of evidence supported Hess's theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves. This evidence led scientists to look again at Wegener's hypothesis of continental drift.
The appropriate answer is a. A low-pressure system. Low-pressure systems are associated with cloud cover, thunderstorms and relatively high winds. The lower the pressure in the system the higher the wind speed. Examples of low-pressure systems include hurricanes, tropical storms, depressions and cold fronts. High-pressure systems such as anti-cyclones bring fair weather with relatively calm conditions.
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I believe the correct answer is: D. Sponges and intervebrates dominated the seas.
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