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Continental Crust Was Only Able to Form Once Earth's Temperature

question 39

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Continental crust was only able to form once Earth's temperature had cooled enough for partial melting of the mantle to occur and produce basalt that was buoyant enough to stay afloat.Before this point small rafts of thin crust formed and remelted in a continuous cycle.What was the composition of these rafts?


Definitions:

Positive Punishment

A behavioral concept where the introduction of an unfavorable outcome or stimulus decreases the likelihood of a behavior recurring.

Negative Punishment

A behavior modification method involving the removal of desirable stimuli to decrease a behavior's occurrence.

Physical Punishment

A form of discipline that involves the use of physical force with the intention of causing a person to experience pain but not injury, for purposes of correction or control.

Suppression

The conscious act of stopping oneself from thinking or feeling certain emotions or thoughts.

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