Exploring Earth's Layers and Heat

What is the most abundant element in the Earth's crust?

• Iron

• Oxygen

• Silicon

• Aluminum

Which layer of the Earth is primarily responsible for the movement of tectonic plates?

• Crust

• Outer Core

• Mantle

• Inner Core

What is the primary source of heat in the Earth's interior?

• Solar radiation

• Radioactive decay

• Friction from tectonic plates

• Heat from the Sun

Which of the following processes is responsible for the transfer of heat within the Earth's mantle?

• Conduction

• Radiation

• Convection

• Sublimation

What is the approximate thickness of the Earth's crust?

• 5-10 km

• 30-50 km

• 70-100 km

• 100-150 km

Which of the following statements about plate tectonics is true?

• Plates are static and do not move.

• Plates move due to mantle convection currents.

• Plates are only found in the ocean.

• Plates are made of liquid rock.

What is the term for the process where one tectonic plate is forced under another?

• Subduction

• Divergence

• Convergence

• Transformation

Which mineral is most commonly found in the Earth's crust?

• Quartz

• Feldspar

• Mica

• Calcite

What is the role of mantle plumes in plate tectonics?

• They cool the Earth's surface.

• They create new crust at mid-ocean ridges.

• They are responsible for volcanic hotspots.

• They cause earthquakes.

Which of the following equations represents the heat transfer by conduction?