Convection currents Flashcards
1
Q
Radioactive decay of elements such as _______ generate a lot of heat
A
uranium
2
Q
When lower parts of the asthenosphere heat up they become…
A
less dense and rise
3
Q
As they move towards the top of the asthenosphere they begin to ____ ____ and become ____ _____ , meaning they ____
A
cool down
more dense
sink
4
Q
These circular movements of semi molten rock are called…
A
convection currents
5
Q
Convection currents create ____ on the base of tectonic plates which causes them to move
A
drag
