Volcanic Activity and Earth's Layers

The video explains Earth's structure, focusing on its layers: crust, mantle, and core. It discusses how temperature and pressure increase with depth, affecting rock states. Volcanic eruptions occur when pressurized gases and magma escape through weak crust spots. Different types of volcanoes and eruptions, such as active volcanoes, craters, and calderas, are explored. The video also covers how lava forms plateaus and mountains, and how its viscosity, influenced by silica and water content, affects volcanic formations.

What are the three main layers of the Earth?

• Core, Crust, Atmosphere

• Crust, Mantle, Core

• Mantle, Core, Ocean

• Crust, Ocean, Atmosphere

What is the state of the Earth's outer core?

• Solid

• Liquid

• Plasma

• Gas

How does temperature change as you move deeper into the Earth?

• It decreases

• It remains constant

• It increases

• It fluctuates

What is the term for molten rock beneath the Earth's surface?

• Granite

• Basalt

• Magma

• Lava

What is formed when lava cools and solidifies on the Earth's surface?

• Cone-shaped hill

• Lava

• Crater

• Magma

What is a volcano called that erupts multiple times?

• Active volcano

• Extinct volcano

• Shield volcano

• Dormant volcano

What is a large crater formed by a violent volcanic eruption called?

• Caldera

• Fissure

• Crater

• Vent

What type of eruption results in the formation of plateaus and plains?

• Lava flow eruption

• Explosive eruption

• Fissure eruption

• Silent eruption

What affects the spread of lava during an eruption?

• Temperature

• Viscosity

• Altitude

• Pressure

What type of lava is more likely to form mountains?

• High viscosity lava

• Low viscosity lava

• Lava with low silica content

• Lava with high water content