Layers of the Earth

What is the primary cause of tectonic plate movement?

• The gravitational pull of the moon

• The heat from the Earth's interior, which creates convection currents in the mantle

• The rotation of the Earth

• The movement of ocean currents

How do scientists study the Earth's interior?

• By analyzing seismic waves, drilling, and studying volcanic materials.

• By observing surface weather patterns and climate changes.

• Through satellite imaging and aerial photography.

• By conducting underwater explorations and mapping ocean floors.

How thick is the Earth's crust on average?

• 3 to 10 kilometers

• 5 to 70 kilometers

• 10 to 50 kilometers

• 20 to 100 kilometers

What is the inner core of the Earth primarily made of?

• Solid iron and nickel

• Liquid iron and sulfur

• Granite and basalt

• Copper and aluminum

What is the outermost layer of the Earth called?

• Core

• Crust

• Mantle

• Atmosphere

What geological process occurs in the mantle?

• Subduction of tectonic plates

• Convection currents occur in the mantle, driving plate tectonics.

• Formation of mountain ranges

• Erosion of surface rocks

What is the average depth of the Earth's mantle?

• 1,500 kilometers

• 2,900 kilometers

• 3,200 kilometers

• 4,000 kilometers

What role does the Earth's crust play in supporting life?

• It provides a solid surface for life, containing essential minerals and resources.

• It acts as a barrier against cosmic radiation.

• It regulates the Earth's temperature and climate.

• It serves as a habitat for various species.

What is the state of matter of the outer core?

• Solid

• Gas

• Liquid

• Plasma

What are the four main layers of the Earth?

• Crust, mantle, outer core, inner core

• Atmosphere, hydrosphere, lithosphere, biosphere

• Crust, mantle, lithosphere, asthenosphere

• Inner core, outer core, mantle, tectonic plates