23) The process of flooding a basin with lava is called? A) Weathering B) Basin

Question

23) The process of flooding a basin with lava is called? A) Weathering B) Basin Flooding. C) Differentiation. D) Volcanism. 4C 24) Which is NOT a result of the plastic flow of the upper layers of the Earth's mantle? A) Volcanic activity. B) Earthquakes. C) The mantle can easily be absorbed into the Earth's core. D) The Continents are able to float and drift on the mantle's upper layers. 25) Does mountain building, volcanoes and earthquakes happen on or near subduction zones? B) No 26) Why does the Earth show limited signs of cratering? A) Weathering and plate tectonics have removed most ancient craters.h B) Humans have destroyed most craters. C) The Earth was never hit by meteoroids. D) The Earth was protected form being hit by meteoroids by the Moon.

Explanation / Answer

23. A. The process of flooding a basin with lava is called volcanism in which lava is errupted from the subsurface of earth through a vent. This lava is may be highly viscous or may be highly mobile and flow for distances.

24.B. Earthquakes are a results of brittle nature of earth crust not plastic flow.

25.A. Yes, earthquakes, mountain building and volcanoes occur in subduction zones wher one plate is subducted below another plate. the plate which is subducted gets heated and melted and magma is created causing volcanoes. When two continental plates collide then none of the plate is subducted and the sediments between the plates are molded, folded in the form of a mountain.

26.A. Most of the craters are eroded by continuous processes such as erosion, weathering, gradation, degradation. Hence earth show limited signs of cratering.

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