earths heat engine Flashcards
1
Q
how does the heat engine work
A
1) heat from the source
2) heated rock from mantle rises
3) semi molten rock spreads out carrying the plate
4) the magma cools down and sinks to be reheated
2
Q
why is the earths crust unstable?
A
The plates are made to move by the convection currents. The currents are developed as a result of heat developed by radioactive substances
