1.Observation2.Questions3.Hypothesis4.experiment
Hope this helped:D
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It gets polluted from fertilizers or any spilled chemicals. And those chemicals get obsorbed into the ground. And the gravity pushes them deeper in the soil, till it reaches the underground water (or aquifer)
<span>The pattern of evolution this relationship presents is, convergent evolution. </span>
The crust must have continental (granitic) plate and oceanic (basaltic) plate to cause both explosive (granitic magma) and non-explosive (basaltic magma) eruptions.