UNIVERSE
PLANETARY INTERIORS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Convection cycles move in the mantle. How does this affect the crust?
|
|
crust has no motion
|
|
|
crust moves in random direction
|
|
|
crust moves in same direction convection cycle moves
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -Convection currents drive the movement of Earth’s rigid tectonic plates in the planet’s fluid molten mantle. In places where convection currents rise up towards the crust’s surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig. 7.21).
Detailed explanation-2: -As the warmer material rises, it also cools, eventually pushed aside by warmer rising material and sinking back toward the core. Mantle material flows slowly, like thick asphalt or mountain glaciers. While the mantle material remains solid, the heat and pressure allow convection currents to move the mantle material.
There is 1 question to complete.