Both represent physical weathering.
A repeated series of independent experiments where there is only two possible outcomes (Normally called "Success" or "Failure")
Examples: When you flip a coin. Out comes: head or tails
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Groundwater is defined as water that is found beneath the surface of the earth in conditions of 100 percent saturation (if is less than 100 percent saturation,then the water is considered soil moisture).Ninety-eight percent of earth’s available fresh water is groundwater