Tectonic Plates and Volcanoes Concepts

Naomi explores tectonic plate boundaries in Iceland, focusing on the Sandvik fault on the Reykjanes Peninsula. She explains how constructive plate boundaries create new crust as magma rises and solidifies, forming mid-oceanic ridges and shield volcanoes. The video details the role of convection currents in the mantle, which cause tectonic plates to diverge. The formation of shield volcanoes, like Skjaldbreiður in Iceland, is also discussed. The video concludes with a recap of the processes at constructive plate boundaries.

What is the rate at which the tectonic plates at the Sandvik fault are moving apart?

• 1 centimeter per year

• 2 centimeters per year

• 5 centimeters per year

• 10 centimeters per year

Which two tectonic plates are diverging at the Mid-Atlantic Ridge?

• North American and Eurasian Plates

• South American and African Plates

• Pacific and North American Plates

• Eurasian and African Plates

Which process is responsible for tearing apart the bed of the Atlantic Ocean?

• Subduction

• Volcanic eruption

• Erosion

• Seafloor spreading

Where does the Mid-Atlantic Ridge extend to from Iceland?

• Borneo

• Greenland

• Cape of Good Hope

• Hawaii

What is the primary force driving the movement of tectonic plates?

• Gravity

• Convection currents in the mantle

• Magnetic fields

• Earth's rotation

What happens to magma as it moves away from the heat source in the mantle?

• It cools and sinks

• It rises

• It solidifies

• It evaporates

What type of volcano is formed by the repeated process of magma rising and solidifying?

• Composite volcano

• Cinder cone volcano

• Shield volcano

• Stratovolcano

What is the Icelandic name for the shield volcano that means 'warrior's shield'?

• Katla

• Eyjafjallajökull

• Hekla

• Skjaldbreiður

What is the shape of a shield volcano?

• Broad and gently sloping

• Flat and wide

• Tall and steep

• Narrow and pointed

What are the two major landforms created at constructive plate boundaries?

• Trenches and islands

• Canyons and plateaus

• Mid-oceanic ridges and shield volcanoes

• Mountains and valleys