Connections I:
Though it was widely
accepted by the majority of
earth scientists in 1969 that
mantle convection drove
plate motion, they were still
unable to explain why large
plates moved faster than
small plates. Discuss/explain
(a) how scientists in the
2010 study reported in the
reading resolved this
mystery, and (b) what they
concluded about plate
motion following their
study. (5, 6, 7, 8, 9)