Ridge-Push, Slab-Pull, Slab-Suction

What is a ridge?

• A ridge is a circular formation of hills.
• A ridge is a flat landform with no elevation.
• A ridge is an elevated landform that is long and narrow.
• A ridge is a type of valley.

What is an example of a ridge?

• Rocky Mountains
• Appalachian Ridge
• Sierra Nevada
• Andes Mountain Range

What is ridge push?

• Ridge push is the force that pulls tectonic plates towards the mid-ocean ridges.
• Ridge push occurs only at continental plates and has no effect on oceanic plates.
• Ridge push is caused by the cooling of tectonic plates away from the ridges.
• Ridge push is the force exerted by the elevated mid-ocean ridges that pushes tectonic plates away from the ridge.

What is a subduction zone?

• A subduction zone is a type of volcano.
• A subduction zone is a tectonic boundary where one plate is pushed beneath another.
• A subduction zone is a region of flat land between two mountains.
• A subduction zone is where two plates move apart.

To subduct is to

• move two tectonic plates apart
• move one tectonic plate beneath another
• rotate a tectonic plate
• compress a tectonic plate upwards

What is slab pull?

• Slab pull is the gravitational force acting on tectonic plates at the Earth's surface.
• Slab pull refers to the horizontal movement of tectonic plates away from each other.
• Slab pull is the upward force caused by a rising tectonic plate.
• Slab pull is the force exerted by a sinking tectonic plate that pulls the rest of the plate down into the mantle.

What does the word 'suction' mean?

• The act of pushing objects away from a surface.
• The process of cooling down a substance.
• A method of measuring fluid density.
• The act of drawing in or holding objects or fluids by creating a partial vacuum.

What causes the older rock to slope downward and away from the mid-ocean ridge in the process of ridge push?

• The older rock is warmer and less dense.

• The newly formed rock is less dense and rests on top of the older rock.

• Convection currents in the mantle pull the plate.

• The leading edge of the subducting plate sinks into the mantle.

What is the primary mechanism driving slab pull?

• Rising magma at mid-ocean ridges.

• The denser tectonic plate sinking into the mantle due to gravity.

• Small-scale convection currents in the mantle wedge.

• The plate being pushed away from the mid-ocean ridge.

What is responsible for trench suction?

• The weight of the subducting plate.

• The upward movement of magma at a ridge.

• A small-scale convection current in the mantle wedge.

• The collision of two continental plates.