Exploring the Layers of the Earth

The video explores the Earth's structure, comparing it to an onion with layers: crust, mantle, and core. The crust is the outermost layer, composed of basalt and granite. The mantle, beneath the crust, is semi-liquid and responsible for tectonic activity. The core, at the center, consists of an outer liquid layer and a solid inner layer, generating Earth's magnetic field. Scientists study these layers to understand Earth's formation and predict natural phenomena.

What analogy is used to describe the Earth's layers?

• A layered cake

• A chocolate bar

• An onion

• A stack of books

What is the outermost layer of the Earth called?

• The lithosphere

• The crust

• The core

• The mantle

What type of rocks primarily make up the oceanic crust?

• Sandstone

• Granite

• Limestone

• Basalt

What is the main component of the continental crust?

• Nickel

• Granite

• Iron

• Basalt

What is the thickness of the Earth's crust?

• Over 1000 kilometers

• 5 to 70 kilometers

• 100 to 200 kilometers

• 300 to 500 kilometers

What describes the state of the rocks in the mantle?

• Gaseous

• Semi-liquid or viscous

• Liquid

• Solid

What layer of the Earth is responsible for the formation of volcanoes?

• The lower mantle

• The inner core

• The outer core

• The crust

What generates the Earth's magnetic field?

• The inner core

• The outer core

• The mantle

• The rotation of the Earth

What are the two metals predominantly found in the core?

• Aluminum and Silicon

• Silver and Gold

• Iron and Nickel

• Copper and Zinc

How is the inner core different from the outer core?

• It is in a semi-solid state

• It is made of different materials

• It is hotter

• It is in a liquid state