Science

• theory that explains not only the movement of the continents but also the changes in he Earth
• s crust ccaused by internal forces

riid blocks of the Earth's crust and upper mantle

consists of nine large and several small plates

rigid solid blocks of earths crust and upper mantle

currents of hot mantle rock rise and separate at this point creating new ocean crust at the rate of two to ten centimeters per year

oceanic crust collides with either another oceanic plate or a continental plate

created when two plates slide past one another

process where the crust is forced apart and boundaries are formed

Red Sea was created this way  and this is also the process that broke up Pangaea and created the Atlantic ocean

oceanic plates slide under lighter continental plates and plunges into the mantle

forms a trench

created when two plates slide sideways past each other