The boundary between the crust and the mantle is called the Mohorovicic discontinuity. But the underside of the crust and upper mantle are in some ways so alike that they blend together.
accept
accident
active
additional
adjective
affect
alphabet
Alice
announced
anybody
April
arrange
Australia
aware
badly
bee
belt
bite
blind
bound
castle
characteristic
Columbus
compass
consonant
curve
definition
Don
dish
driven
dug
earn
Eddy
eventually
explore
fairly
fewer
fifth
