Home > An Introduction to Geology > Concept #3 Quiz
we ask a question based upon our observations when hypotheses “pass” tests, we should devise additional tests until the hypothesis fails observations are used to make hypotheses that are required to be “testable” all of these
~ 3.8 billion ~ 13 billion ~ 2.0 million ~ 4.5 billion ~ 200 million
a hypothesis that passes a test is considered a fact hypotheses necessarily allow predictions to be made hypotheses explain observations, but must be tested for validity a hypothesis is different from a theory hypotheses are constructed to explain observations
A hypothesis is a series of observations, and a theory is a model that explains them. A hypothesis is the same as a theory, just named by different scientists. A hypothesis is a model that has passed a series of tests, but a theory explains a set of observations. A hypothesis is developed to explain observations, but a theory is a hypothesis that has passed a series of tests. A hypothesis is a model that requires testing, but a theory is a fact.
The glacier is shown to be flowing in the downhill direction. At the same time, the glacier’s snout (terminus) is shown to be retreating in the uphill direction and the glacier’s ice volume is decreasing.
Rocky debris in the valley downhill from the snout was deposited by Noah’s flood. The melting rate of ice in the glacier exceeded the rate at which new snow and ice were added to the glacier. The glacial hypothesis was finally accepted as scientific theory. Cooler temperatures meant slower forward glacier flow resulting in snout retreat uphill.
