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Questions and Answers
What is the primary source of Earth's internal heat?
What is the primary source of Earth's internal heat?
What process is responsible for the production of primordial heat in the Earth?
What process is responsible for the production of primordial heat in the Earth?
Which radioactive element is NOT mentioned as a source of internal heat?
Which radioactive element is NOT mentioned as a source of internal heat?
How does heat from the Earth's interior typically move towards the surface?
How does heat from the Earth's interior typically move towards the surface?
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What happens to the amount of Earth's internal heat over time?
What happens to the amount of Earth's internal heat over time?
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Which of the following best describes radioactive decay?
Which of the following best describes radioactive decay?
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What is NOT a mechanism of heat transfer from Earth's core to its surface?
What is NOT a mechanism of heat transfer from Earth's core to its surface?
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What is the role of tectonic plates in relation to Earth's internal heat?
What is the role of tectonic plates in relation to Earth's internal heat?
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What is the primary process through which magma is formed?
What is the primary process through which magma is formed?
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What happens to rocks during partial melting?
What happens to rocks during partial melting?
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How does pressure affect the melting point of rocks?
How does pressure affect the melting point of rocks?
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Which type of melting occurs when pressure is reduced but temperature remains constant?
Which type of melting occurs when pressure is reduced but temperature remains constant?
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What can induce flux melting in rocks?
What can induce flux melting in rocks?
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Where does decompression melting primarily occur?
Where does decompression melting primarily occur?
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In what way does magma interact with surrounding rock as it moves to the surface?
In what way does magma interact with surrounding rock as it moves to the surface?
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What is the significance of temperature in the melting of rocks?
What is the significance of temperature in the melting of rocks?
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What is the primary factor that influences the strength of volcanic eruptions?
What is the primary factor that influences the strength of volcanic eruptions?
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Which geological phenomena does volcanism describe?
Which geological phenomena does volcanism describe?
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What role does water vapor play in the process of volcanic eruptions?
What role does water vapor play in the process of volcanic eruptions?
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What type of rock formations are created from lava that undergoes crystallization on the surface?
What type of rock formations are created from lava that undergoes crystallization on the surface?
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What is significant about the average concentration of water vapor in magmatic gases during eruptions?
What is significant about the average concentration of water vapor in magmatic gases during eruptions?
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What is the primary effect of high temperatures on magma?
What is the primary effect of high temperatures on magma?
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What is meant by magma intrusion?
What is meant by magma intrusion?
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Which of the following describes plutonites?
Which of the following describes plutonites?
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What happens to magma as it cools and forms silica tetrahedra?
What happens to magma as it cools and forms silica tetrahedra?
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What is associated with the process of magma differentiation?
What is associated with the process of magma differentiation?
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What characterizes magma extrusion?
What characterizes magma extrusion?
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What effect does increasing viscosity of magma have during a volcanic eruption?
What effect does increasing viscosity of magma have during a volcanic eruption?
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What is lava?
What is lava?
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What is one of the main sources of heat energy that prevents the Earth from cooling off completely?
What is one of the main sources of heat energy that prevents the Earth from cooling off completely?
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How does gravitational pressure contribute to the heat within the Earth's interior?
How does gravitational pressure contribute to the heat within the Earth's interior?
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What is the composition of the Earth's inner core primarily made up of?
What is the composition of the Earth's inner core primarily made up of?
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What happens to materials in the inner core due to the intense pressure?
What happens to materials in the inner core due to the intense pressure?
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Which heavy elements are likely present in the Earth's core due to its density?
Which heavy elements are likely present in the Earth's core due to its density?
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How does Earth's interior heat contribute to endogenic processes?
How does Earth's interior heat contribute to endogenic processes?
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What phenomenon indicates the presence of liquid regions within the Earth?
What phenomenon indicates the presence of liquid regions within the Earth?
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What role do rocks play regarding heat in Earth's interior?
What role do rocks play regarding heat in Earth's interior?
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Flashcards
Earth's internal heat sources
Earth's internal heat sources
The sources of heat within the Earth, including primordial heat and radioactive decay.
Primordial heat
Primordial heat
Heat leftover from the Earth's formation, trapped within the planet's core.
Accretion
Accretion
The process where matter gathers to form larger bodies, like planets.
Radioactive decay
Radioactive decay
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Radioactive Isotopes
Radioactive Isotopes
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Convective Transport
Convective Transport
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Conductive Transport
Conductive Transport
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Earth's thermal engine
Earth's thermal engine
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Earth's internal heat
Earth's internal heat
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Gravitational pressure
Gravitational pressure
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Earth's core density
Earth's core density
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Inner core composition
Inner core composition
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Seismic waves
Seismic waves
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Molten material
Molten material
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Endogenic Processes
Endogenic Processes
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Magma
Magma
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Partial Melting
Partial Melting
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Decompression Melting
Decompression Melting
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Flux Melting
Flux Melting
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Mantle Plume
Mantle Plume
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Mantle Convection Cell
Mantle Convection Cell
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Melting Curve
Melting Curve
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Magma Chamber
Magma Chamber
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Volcanic Eruptions
Volcanic Eruptions
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Volcanism
Volcanism
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Volcanite
Volcanite
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Why are deeper magma chambers associated with stronger eruptions?
Why are deeper magma chambers associated with stronger eruptions?
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What happens when magma cools?
What happens when magma cools?
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Intrusion
Intrusion
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Extrusion
Extrusion
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Plutonism
Plutonism
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Magma Differentiation
Magma Differentiation
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Plutonites
Plutonites
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Volcano formation
Volcano formation
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Study Notes
Earth's Internal Heat Sources
- Heat is needed for life, originating from internal and external sources.
- Earth's internal heat drives natural phenomena like earthquakes and volcanic eruptions, and plate movement.
- Earth formed 4.6 billion years ago, acting as a habitat for diverse organisms.
- Internal heat varies within layers, increasing from the crust to the inner core.
Primordial Heat
- Earth formed through accretion of gas and dust clouds, releasing heat in collisions.
- Heat was trapped/preserved within the planet's core.
- Heat transfer from internal core to the mantle took a long time.
- Conduction and convective heat transport played a role.
Radioactive Decay
- Earth's internal heat originates from radioactive isotopes decaying.
- Examples of key isotopes include Potassium-40, Uranium-235, Uranium-238, and Thorium-232.
- These decays release energy (heat) and matter.
- This process prevents Earth from cooling completely.
Gravitational Pressure
- Pressure increases as you descend within Earth's interior.
- Pressure at the Earth's center is extremely high (million times atmospheric pressure).
- Pressure keeps rocks within Earth's interior in a solid state, despite extreme temperatures, preventing them from escaping.
Dense Core Materials
- Earth's core has a high density.
- Metallic elements like iron and nickel are present in the dense core.
- Materials of the inner core (Iron/Nickel) reach very high temperatures (12,600 - 13,000 kg/m³).
- This density and material contribute to the planet's internal heat.
Endogenic Processes: Plutonism and Volcanism
- Seismic waves show Earth is solid in many regions, but liquid regions (magma) exist.
- Earth's internal heat fuels various geological activities.
Magma Formation
- Magma forms from partial melting of mantle rock, under specific conditions.
- Different minerals melt at various temperatures.
- Pressure increases with depth, influencing melting points of materials within the Earth.
- Two main mechanisms for melting are decompression (reduced pressure) and flux (addition of water/gases).
Intrusive forms of Igneous Rocks (Plutonism)
- Magma intrudes the crust without erupting.
- Intrusions form plutonites.
- Processes of crystalization and solidification occur below Earth's surface.
Extrusive forms of Igneous Rocks
- Magma erupts to the Earth's surface.
- Creates volcanic features (volcanoes, eruptions).
- Magma cools and crystallizes to form volcanites.
Volcanism
- Volcanism encompasses geological processes related to igneous material transport on Earth's surface, including volcanic eruptions, hot spring activity.
- Magma may rise through cracks called pipes.
- Magma rises due to pressure and flow.
- Water vapor is a significant component of volcanic eruptions.
- Eruptions create volcanic rock formations (volcanites).
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Description
Explore the various internal heat sources of Earth that drive significant geological phenomena. Learn about the formation of primordial heat, radioactive decay, and gravitational pressure's role in maintaining Earth's temperature. This quiz covers the dynamics of heat within the Earth's layers and their implications.