The video discusses volcanoes, their formation, types, and the processes involved in volcanic eruptions. It covers the parts of a volcano, factors affecting eruptions, and different types of volcanoes like shield, cinder cone, and composite volcanoes. The video also explains volcanic activities at plate boundaries and intrusive volcanic activities beneath the Earth's surface.

What is a volcano?

• A type of earthquake

• A large rock formation

• An opening in the Earth's crust where magma escapes

• A mountain formed by tectonic plates

Which Roman god is the word 'volcano' derived from?

• Jupiter

• Neptune

• Mars

• Volcan

What factor does NOT affect the violence of a volcanic eruption?

• Color of lava

• Temperature of magma

• Dissolved gases in magma

• Magma composition

What is the main characteristic of pahoehoe lava?

• Smooth, ropey surface

• Explosive eruptions

• Rough surface

• High silica content

Which type of volcano is the largest in the world?

• Cinder cone

• Composite

• Shield

• Dome

What is a characteristic feature of cinder cone volcanoes?

• Flat top

• Gentle slopes

• Steep slopes

• Underwater formation

Where do most volcanic activities occur on Earth?

• In forests

• At the poles

• Along mid-ocean ridges

• In deserts

What is a subduction zone?

• A place where one tectonic plate slides beneath another

• A place where tectonic plates collide head-on

• A place where two tectonic plates move apart

• A place where tectonic plates are stationary

What is a dike in geological terms?

• A large volcanic crater

• A vertical intrusion of magma

• A type of volcanic rock

• A horizontal intrusion of magma

What forms when magma cools and solidifies beneath the Earth's surface?

• Volcanic ash

• Lava flow

• Earthquake

• Intrusive rock formations