Catastrophic events are sudden, natural or man-made, situations where change & destruction occur. All catastrophic events are the Earth's way of maintaining equilibrium during change.
<span>A spring is water coming from under the ground to the surface of the earth and a stream is water that is running along the ground through a trench like place on earth down a hill or steep a area.</span>
1,2,3,4 is the answer, your welcomethe answer is movement !
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So I cant give u an exact answer, but to determine density you need to get the mass/volume
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