convection currents Flashcards
1
Q
what is a convection current?
A
a convection currents is the process of a warm molecule that are less dense which causes them to rise and when they rise up they get denser, causing them to fall and become less dense again. it goes around in a circle
2
Q
how are convection currents created?
A
heat rising and falling inside the mantel
3
Q
how are convection currents formed?
A
because of heated fluid expands becoming less dense
4
Q
what are tectonic plates made of?
A
earths crust and the top of the mantel
5
Q
what is less dense, earths crust or upper mantel?
A
earths crust
6
Q
where do convection currents take place
A
mantel
7
Q
what does heat from the core do?
A
heat up the lower mantel
