Understanding Convection Currents in Earth's Mantle

What causes convection currents in the Earth's mantle?

• Movement of molten rock due to temperature and density differences

• Direct contact between materials

• Electromagnetic waves

• Movement of tectonic plates

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

• Decay of radioactive elements and residual heat from the planet's formation

• Solar radiation

• Friction between tectonic plates

• Volcanic activity

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How does magma behave as it heats up in the Earth's mantle?

• It becomes less dense and rises

• It becomes more dense and sinks

• It remains stationary

• It cools down immediately

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What is the most significant method of heat transfer in the Earth's mantle?

• Convection

• Conduction

• Radiation

• Evaporation

What geological phenomena are influenced by convection currents in the mantle?

• Movement of tectonic plates, formation of mountains, earthquakes, and volcanic activity

• Ocean currents

• Weather patterns

• Erosion

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