Weegy: Tectonic plates are composed of the crust and upper mantle rock which is lighter than the more dense mantle. Rising and falling convection currents in the mantle cause imperceptibly slow movements in the plates (on the rate of fingernail growth). [ The source of the heat driving the convection currents comes from residual heat from the Earth's formative processes, pressure from gravity, and from radioactive decay of elements.
Convection currents inside Earth provide the mechanism for plate motion. ]
User: what are the main ideas of the big bang theory?
Weegy: One of the main ideas is that when the universe started out it was a hot clump of matter. then it exloded into what we have today. since the explotion we are still driffting outwards filling all of space.
(More) 3
The movement of tectonic plates is primarily driven by the convective currents in the Earth's mantle, causing plates to drift apart, collide, or slide past each other.
Added 147 days ago|7/12/2024 8:52:38 AM
This answer has been confirmed as correct and helpful.
3
The Big Bang theory posits that the universe originated from an extremely hot and dense state about 13.8 billion years ago, and has since been expanding and cooling.
Added 147 days ago|7/12/2024 8:53:37 AM
This answer has been confirmed as correct and helpful.
