Volcanic Activity and Plate Movements in Earth's Geological Processes

The video tutorial explores how the movement of Earth's plates influences volcanic activity. It covers continental rift volcanism, where stretching plates form rift valleys and allow magma to rise. The video also explains subduction zones, where oceanic plates sink beneath continental plates, creating volcanic arcs like the Andes. Additionally, it discusses volcanic island arcs formed by oceanic plate subduction, and hotspots, where stationary mantle plumes create chains of volcanic islands, exemplified by the Hawaiian Islands.

What geological feature is formed when the Earth's crust is stretched and sinks down?

• Volcanic island

• Mountain range

• Rift valley

• Ocean trench

What process allows magma to rise during continental rifting?

• Cooling of the crust

• Increased pressure

• Subduction of ocean floor

• Depressurization of the mantle

What is formed when an ocean floor subducts beneath a continent?

• Ocean trench

• Rift valley

• Mantle plume

• Hotspot

Which mountain range is an example of a continental volcanic arc?

• Appalachian Mountains

• Rocky Mountains

• Andes Mountains

• Himalayas

What happens when ocean floor subducts beneath another ocean floor?

• Formation of a rift valley

• Emergence of a hotspot

• Creation of a volcanic island arc

• Development of a continental volcanic arc

Which of the following is an example of a volcanic island arc?

• Aleutian Islands

• Galápagos Islands

• Canary Islands

• Hawaiian Islands

What is a hotspot in terms of volcanic activity?

• A place where ocean floor subducts beneath a continent

• A zone of high seismic activity

• A region where tectonic plates collide

• A local area where magma forms due to mantle plumes

What geological feature is formed by a chain of volcanic islands created by a hotspot?

• Volcanic island arc

• Ocean trench

• Continental volcanic arc

• Rift valley

How do mantle plumes contribute to the formation of volcanic islands?

• By causing tectonic plates to collide

• By creating a chain of volcanoes as plates move over them

• By subducting ocean floor beneath continents

• By forming rift valleys

Which islands are an example of a chain formed by a hotspot?

• Marianas Islands

• Philippines

• Aleutian Islands

• Hawaiian Islands