Question

the rock cycle is driven by two forces:

1. earth’s ________ engine, which moves material around in the core and mantle and leads to slow but significant changes within the crust, and
2. the ________, which is the movement of water, ice, and air at the surface, and is powered by the sun.

the rock cycle is still ______ on earth because its core is ____ enough to keep the mantle moving, and its atmosphere is relatively ____, and it has liquid ______.

several ________ can turn one type of rock into another type of rock. the key processes of the rock cycle are:

• ________
• ________
• ________

Explanation:

Part 1: Filling the Blanks about Rock Cycle Drivers

1. The first force driving the rock cycle is Earth’s internal heat engine. The internal heat (from radioactive decay and residual heat from Earth’s formation) drives convection in the mantle, moving material in the core, mantle, and leading to crustal changes (like plate tectonics).
2. The second force is the hydrologic cycle (or external energy from the sun). The sun powers the movement of water, ice, and air at Earth’s surface (e.g., erosion, weathering, transportation of materials), which is part of the hydrologic cycle.

Part 2: Why the Rock Cycle Persists on Earth

• The rock cycle is still active on Earth.
• Earth’s core is hot enough to keep the mantle convecting (driving plate tectonics and internal processes).
• The atmosphere is relatively dense (or “stable” in terms of supporting weather processes) to enable surface processes.
• Earth has liquid water (a key component of the hydrologic cycle, driving erosion, deposition, etc.).

Part 3: Processes in the Rock Cycle

• Several geological processes can transform one rock type into another.
• Key processes of the rock cycle:
• Melting and Cooling (forms igneous rocks, e.g., magma solidifies).
• Weathering and Erosion (breaks down rocks into sediments, which can form sedimentary rocks).
• Metamorphism (alters rocks under heat/pressure to form metamorphic rocks).
• Optional additional processes: Compaction/Cementation (for sedimentary rocks), Uplift (exposes rocks to surface processes), etc.

Final Answers (Filled Blanks)

1. Earth’s \(\boldsymbol{\text{internal heat}}\) engine...
2. the \(\boldsymbol{\text{hydrologic cycle (or external energy)}}\)...

The rock cycle is still \(\boldsymbol{\text{active}}\) on Earth because its core is \(\boldsymbol{\text{hot}}\) enough to keep the mantle moving, and its atmosphere is relatively \(\boldsymbol{\text{dense (or stable)}}\), and it has liquid \(\boldsymbol{\text{water}}\).

Several \(\boldsymbol{\text{geological processes}}\) can turn one type of rock into another. The key processes of the rock cycle are:

• \(\boldsymbol{\text{Melting and Cooling}}\)
• \(\boldsymbol{\text{Weathering and Erosion}}\)
• \(\boldsymbol{\text{Metamorphism}}\) (or other valid processes like Compaction/Cementation, Uplift)

(Note: Answers may vary slightly based on textbook terminology, but these are the standard concepts for the rock cycle.)

Answer:

Part 1: Filling the Blanks about Rock Cycle Drivers

1. The first force driving the rock cycle is Earth’s internal heat engine. The internal heat (from radioactive decay and residual heat from Earth’s formation) drives convection in the mantle, moving material in the core, mantle, and leading to crustal changes (like plate tectonics).
2. The second force is the hydrologic cycle (or external energy from the sun). The sun powers the movement of water, ice, and air at Earth’s surface (e.g., erosion, weathering, transportation of materials), which is part of the hydrologic cycle.

Part 2: Why the Rock Cycle Persists on Earth

• The rock cycle is still active on Earth.
• Earth’s core is hot enough to keep the mantle convecting (driving plate tectonics and internal processes).
• The atmosphere is relatively dense (or “stable” in terms of supporting weather processes) to enable surface processes.
• Earth has liquid water (a key component of the hydrologic cycle, driving erosion, deposition, etc.).

Part 3: Processes in the Rock Cycle

• Several geological processes can transform one rock type into another.
• Key processes of the rock cycle:
• Melting and Cooling (forms igneous rocks, e.g., magma solidifies).
• Weathering and Erosion (breaks down rocks into sediments, which can form sedimentary rocks).
• Metamorphism (alters rocks under heat/pressure to form metamorphic rocks).
• Optional additional processes: Compaction/Cementation (for sedimentary rocks), Uplift (exposes rocks to surface processes), etc.

Final Answers (Filled Blanks)

1. Earth’s \(\boldsymbol{\text{internal heat}}\) engine...
2. the \(\boldsymbol{\text{hydrologic cycle (or external energy)}}\)...

The rock cycle is still \(\boldsymbol{\text{active}}\) on Earth because its core is \(\boldsymbol{\text{hot}}\) enough to keep the mantle moving, and its atmosphere is relatively \(\boldsymbol{\text{dense (or stable)}}\), and it has liquid \(\boldsymbol{\text{water}}\).

Several \(\boldsymbol{\text{geological processes}}\) can turn one type of rock into another. The key processes of the rock cycle are:

• \(\boldsymbol{\text{Melting and Cooling}}\)
• \(\boldsymbol{\text{Weathering and Erosion}}\)
• \(\boldsymbol{\text{Metamorphism}}\) (or other valid processes like Compaction/Cementation, Uplift)

(Note: Answers may vary slightly based on textbook terminology, but these are the standard concepts for the rock cycle.)