Exploring Earth's Layers

What are the four main layers of the Earth mentioned in the video?

• Crust, Mantle, Inner Core, Outer Core

• Crust, Mantle, Tectonic Plates, Core

• Crust, Mantle, Core, Lithosphere

• Crust, Mantle, Oceanic Layer, Continental Layer

How thick is the Earth's crust under the oceans?

• 3 to 5 miles

• 25 to 30 miles

• 10 to 15 miles

• 1 to 2 miles

How thick is the Earth's crust on land?

• Around 50 miles

• Around 25 miles

• Around 5 miles

• Around 10 miles

What percentage of the Earth's weight is made up by the mantle?

• 75%

• 95%

• 85%

• 65%

What materials compose the Earth's mantle?

• Silicate rocks with iron and magnesium

• Carbon and quartz

• Granite and basalt

• Iron and nickel

What is the depth of the Earth's mantle?

• Nearly 3000 miles

• Approximately 500 miles

• About 1000 miles

• Almost 1900 miles

What causes earthquakes according to the video?

• Meteor impacts

• Gravitational forces

• Movement of tectonic plates

• Volcanic activity

What are tectonic plates made of?

• Mantle and inner core

• Crust and outer core

• Inner core and mantle

• Outer mantle and crust

What phenomenon can occur when tectonic plates move?

• Volcanic eruptions

• Earthquakes

• Hurricanes

• Tsunamis

How fast do tectonic plates typically move?

• A couple of inches per year

• Several feet per year

• A few meters per year

• A few centimeters per year