Weegy: Seismic waves and water can weaken soil, causing it to move. This is called liquefication.
User: River deltas are _____.
Weegy: "River deltas are landform that are formed at the mouth of a river, where that river flows into an ocean, sea, estuary, lake, or reservoir. Deltas are formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river. Over long periods of time, this deposition builds the characteristic geographic pattern of a river delta." SOURCE:
User: Most volcanoes are found _____.
Weegy: Spreading ridges and subduction zones are areas where volcanic activity (and earthquakes) often occur. [ The spreading ridge is the region where two tectonic plates are moving apart, as represented by the East Pacific Rise and the Mid-Atlantic Ridge (Atlantic Ocean formation). Since the ocean floor crust is often relatively thin, volcanic activity here is often seen as lava pouring out through a long fissure and the rock formed spreading away from the rift. If an oceanic plate encounters and subducts a continental plate, it may carry with it sediment from from erosion of continental material. (In this subduction region a trench is often seen.) As the subducted crust (plus other material) sinks, it is warmed and may melt. The hot magma rises and can form volcanoes as is pushes up through the crust.
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