Plate Tectonics Quiz & Flashcards

New crust forms at divergent boundaries, where plates move apart.

Trenches are formed at convergent boundaries due to subduction.

Convection currents in the mantle are the primary driving force behind plate movement.

The San Andreas Fault is a transform boundary where plates slide past each other.

The Himalayas were formed by the collision of the Indian and Eurasian continental plates.

Weather patterns are not evidence for plate tectonics.

Seafloor spreading at divergent boundaries forms mid-ocean ridges like the Mid-Atlantic Ridge.

Oceanic crust is denser than continental crust.

Island arcs are typically formed when one oceanic plate subducts beneath another.

Transform boundaries are characterized by horizontal sliding of plates.

Mantle convection is the primary mechanism driving lithospheric plate movement.

The Ring of Fire is located around the Pacific Ocean and is known for its volcanic and earthquake activity.

Rift valleys form at divergent boundaries where plates move apart.

Mantle plumes create hotspots by melting through the Earth's crust.

A common misconception is that plates are fixed; they actually move and interact.

The asthenosphere is a semi-fluid layer that allows tectonic plates to move.

Subduction recycles crustal material by pulling it into the mantle.

Earthquakes frequently occur at transform faults where plates slide past each other.

Trenches are typically formed at convergent boundaries due to subduction.

Hotspots are associated with volcanic eruptions due to mantle plumes melting through the crust.

Magnetic striping on ocean floors provides evidence for seafloor spreading as new crust forms and records Earth's magnetic field.

Earthquakes occur due to the movement and interaction of tectonic plates.

Tectonic plates float on the asthenosphere, a semi-fluid layer of the mantle.

Crust recycling occurs at subduction zones where one plate is forced below another into the mantle.

Isostasy explains how tectonic plates maintain equilibrium by 'floating' at different heights based on their density and thickness.

Plate tectonics contribute to recycling rocks by processes like subduction and uplift, which form new rocks.

Oblique is not a recognized type of plate boundary; the main types are divergent, convergent, and transform.

Volcanic arcs form from subduction of oceanic plates beneath continental or other oceanic plates.

Mountains like the Andes form at convergent boundaries where plates collide and one is forced over another.

The Hawaiian Islands were formed by hotspot volcanism, where a mantle plume created volcanic islands away from plate boundaries.

Mantle convection is significant because it drives the movement of tectonic plates by circulating heat within the mantle.

Earthquakes occur at plate boundaries primarily due to the release of stress accumulated from plate movements.

Subduction is the process where oceanic crust is returned to the mantle at convergent boundaries.

The Himalayas mark the boundary between the Eurasian and Indian plates due to their collision.

Iceland's volcanic activity is due to its location on a divergent boundary at the Mid-Atlantic Ridge.

Mid-ocean ridges are formed by the upward movement of mantle material at divergent boundaries.

Movement of tectonic plates over a stationary hotspot results in the formation of island chains like Hawaii.

Transform boundaries are highly associated with earthquake activity due to the shearing motion of plates.

Slab pull drags plates down into the mantle, contributing to their movement.

The East African Rift is formed by divergent boundary activity as the African Plate splits into two smaller plates.

Mountain ranges, like the Himalayas, are a direct result of continental-continental plate collision.

The lithosphere acts as a brittle, rigid shell composed of the crust and uppermost mantle.

Plate tectonics alter ocean basin shapes, which can affect the patterns of ocean currents.

Volcanic islands in a linear chain are primarily created by hotspot activity as a plate moves over a stationary hotspot.

Density is the primary differentiating factor, with oceanic plates being denser than continental plates.

The Wilson Cycle describes the lifecycle of ocean basins from formation to closure through plate tectonics.

The Mid-Atlantic Ridge is a geological feature formed by a divergent boundary.

Hotspots explain volcanic activity away from plate boundaries as they are independent of plate interactions.

Mantle convection is the primary reason continents drift as it drives the movement of tectonic plates.

Fossil distribution provides primary evidence for past continental movement by showing similar species on distant continents.