Under what circumstances might the plates of the earth stop moving? Considering the theory of continental drift, is it possible that the continents of the earth could once again become one? Explain your answer.

Which kind of plate movement do you think causes the most damage to human societies? Explain your answer.

The unit discusses Venice, Italy, as a city having problems with rising sea levels. Where else would rising levels be a problem?

How does an incorrect hypothesis help advance science?