Earth's Layers and Composition

The video explores the Earth's structure, detailing its four main layers: crust, mantle, outer core, and inner core. It explains the characteristics and significance of each layer, including the crust's division into oceanic and continental types, the mantle's role in volcanic activity, and the core's composition of nickel and iron. The video also covers the lithosphere and asthenosphere, emphasizing their roles in plate tectonics. A review section reinforces the learning objectives.

How many main layers does the Earth have?

• Five

• Four

• Three

• Two

What is the Earth's crust primarily made of?

• Water

• Air

• Rocks and minerals

• Gas

What is the term for the movement of the Earth's plates?

• Continental drift

• Volcanic activity

• Seismic shift

• Plate tectonics

What is the lithosphere composed of?

• Molten iron

• Gaseous elements

• Liquid magma

• Solid and rigid rocks

Which layer of the Earth is the largest by volume?

• Outer core

• Mantle

• Inner core

• Crust

What is the primary composition of the Earth's mantle?

• Ice

• Magma

• Sand

• Water

What are the main components of the Earth's outer core?

• Silicon and oxygen

• Nickel and iron

• Carbon and hydrogen

• Aluminum and magnesium

What causes the high pressure in the Earth's inner core?

• Overlying layers

• Magnetic fields

• Tectonic activity

• Gravity

What state of matter is the Earth's inner core primarily in?

• Gas

• Solid

• Plasma

• Liquid

What is the temperature range of the Earth's outer core?

• 0-1000°F

• 1000-3000°F

• 9000-12000°F

• 4000-9000°F