Exploring the World of Volcanoes

What are the three main types of volcanoes?

• Fissure vents

• Shield volcanoes, stratovolcanoes, cinder cone volcanoes

• Lava domes

• Mud volcanoes

Which type of volcano is characterized by gentle slopes and non-explosive eruptions?

• Cinder cone volcano

• Stratovolcano

• Lava dome volcano

• Shield volcano

What is a stratovolcano and how does it differ from a shield volcano?

• A stratovolcano has a wide base and gentle slopes, while a shield volcano has a narrow base and steep slopes.

• A stratovolcano is formed by lava flows, while a shield volcano is formed by ash and debris.

• A stratovolcano is steep and explosive, while a shield volcano is broad and less explosive.

• A stratovolcano is flat and non-explosive, while a shield volcano is steep and explosive.

What type of volcanic eruption is known for its explosive nature?

• Hawaiian eruption

• Strombolian eruption

• Plinian eruption

• Fissure eruption

What is the term for the opening in the Earth's crust through which lava erupts?

• volcano

• geyser

• fault line

• crater

What is the primary material ejected during a volcanic eruption?

• Ash

• Lava

• Gas

• Rock fragments

How does a caldera form after a volcanic eruption?

• A caldera forms from the buildup of lava around the volcano.

• A caldera forms due to the collapse of land after a volcanic eruption that empties the magma chamber.

• A caldera is created by the eruption of gas and ash only.

• A caldera forms when a volcano erupts and new magma is added to the chamber.

What are the stages of volcanic activity?

• Active, Erupting, Cooling, Extinct

• The stages of volcanic activity are Quiescent, Pre-eruption, Eruption, Post-eruption, and Dormant.

• Awakening, Eruption, Cooling, Extinct

• Initial, Active, Cooling, Reawakening

What is the role of tectonic plates in the formation of volcanoes?

• Tectonic plates prevent volcanic activity by stabilizing the Earth's crust.

• Tectonic plates have no impact on the formation of geological features.

• Volcanoes are formed solely by the movement of ocean currents.

• Tectonic plates contribute to volcanic formation through subduction and divergent boundaries, leading to magma generation.

What is the difference between magma and lava?

• Magma and lava are the same substance regardless of location.

• Magma is underground molten rock; lava is magma that has erupted onto the surface.

• Magma is always found on the surface; lava is found underground.

• Lava is a solid rock; magma is a liquid rock.