Understanding Plate Tectonics

What are convection currents and how do they affect plate movement?

• Convection currents in the mantle drive the movement of tectonic plates.

• Convection currents are caused by ocean tides.

• Plate movement is solely due to earthquakes.

• Convection currents only occur in the atmosphere.

Explain the concept of slab pull at destructive margins.

• Slab pull is the force that pushes oceanic plates away from each other.

• Slab pull occurs only at constructive margins where plates are moving apart.

• Slab pull is the force exerted by a sinking oceanic plate at destructive margins, pulling the rest of the plate down into the mantle.

• Slab pull is caused by the rising of mantle material beneath oceanic plates.

What is slab push and where does it occur?

• Slab push is a tectonic process that occurs at divergent boundaries, particularly at mid-ocean ridges.

• Slab push happens at transform boundaries.

• Slab push is a phenomenon related to volcanic eruptions.

• Slab push is a process that occurs at convergent boundaries.

Describe the relationship between divergent margins and crustal creation.

• Divergent margins lead to the formation of mountains and highlands.

• Divergent margins are primarily associated with volcanic eruptions and not crustal creation.

• Divergent margins are sites of crustal creation due to the separation of tectonic plates, allowing magma to rise and form new crust.

• Divergent margins are locations where crust is destroyed by subduction.

How do convergent margins relate to crustal destruction?

• Convergent margins lead to crustal destruction through subduction, where one tectonic plate is forced under another, causing the melting of crust.

• Convergent margins have no impact on crustal formation.

• Crustal destruction occurs only at divergent margins.

• Convergent margins create new crust through volcanic activity.

What is the average rate of tectonic plate movement?

• 5 to 15 meters per year

• 20 to 30 centimeters per year

• 0.1 to 0.5 kilometers per year

• 1 to 10 centimeters per year

How do convection currents influence the direction of plate movement?

• Convection currents cause plates to move in a circular motion without boundaries.

• Convection currents only affect ocean currents, not tectonic plates.

• Convection currents have no impact on the movement of tectonic plates.

• Convection currents cause tectonic plates to move apart at divergent boundaries and come together at convergent boundaries.

What geological features are formed at mid-oceanic ridges?

• Volcanic activity, rift valleys, and hydrothermal vents.

• Mountain ranges

• Deserts

• Glaciers

Discuss the significance of plate tectonics in understanding earthquakes.

• Plate tectonics is crucial for understanding earthquakes as it explains their occurrence at plate boundaries and the mechanisms behind seismic activity.

• Plate tectonics has no relation to seismic activity.

• Plate tectonics is solely about continental drift.

• Earthquakes only occur in volcanic regions.

How do human activities impact the study of plate tectonics?

• Human activities can complicate the study of plate tectonics by altering geological processes and introducing additional variables.

• Human activities have no effect on geological processes.

• Human activities simplify the study of plate tectonics.

• Plate tectonics is solely influenced by natural phenomena.