Ch 3: The structure of the Earth
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Questions and Answers

How are large crystals formed in igneous rocks?

  • From rapid cooling
  • From slow cooling (correct)
  • From transportation
  • From weathering

What type of rocks transform under extreme pressure and temperature without melting?

  • Metamorphic rocks (correct)
  • Igneous rocks
  • Sedimentary rocks
  • Intrusive rocks

How are laccoliths and lopoliths formed?

  • By magma intrusion between rock layers (correct)
  • By weathering
  • By erosion
  • By volcanic eruptions

What distinguishes sills from dykes in their formation?

<p>Their orientation (D)</p> Signup and view all the answers

Which type of rock is known for formations like tors?

<p>Igneous rock (B)</p> Signup and view all the answers

How do sedimentary rock landforms differ from karst landscapes?

<p>Karst landscapes are formed in limestone areas with caves and springs (D)</p> Signup and view all the answers

Which layer of the Earth is directly beneath the crust?

<p>Mantle (A)</p> Signup and view all the answers

What marks the boundary between the Earth's crust and mantle?

<p>Mohorovičić discontinuity (Moho) (A)</p> Signup and view all the answers

Which layer of the Earth is primarily composed of nickel (Ni) and iron (Fe)?

<p>Outer Core (B)</p> Signup and view all the answers

What is the physical state of the Earth's inner core?

<p>Solid (B)</p> Signup and view all the answers

Which layer of the Earth is about 1,200 km thick?

<p>Inner Core (A)</p> Signup and view all the answers

What is the temperature range that the mantle of the Earth can reach?

<p>$2000-3000$°C (D)</p> Signup and view all the answers

What is the physical state of the Earth's outer core?

<p>Liquid (B)</p> Signup and view all the answers

Which layer of the Earth remains solid despite extreme heat?

<p>Inner Core (D)</p> Signup and view all the answers

What marks the boundary between the Earth's crust and mantle?

<p>Mohorovičić discontinuity (D)</p> Signup and view all the answers

At what temperature can the mantle of the Earth reach?

<p>$5,000°C$ (B)</p> Signup and view all the answers

Which layer of the Earth is divided into tectonic plates?

<p>Crust (C)</p> Signup and view all the answers

How are dykes and sills different in their orientation?

<p>Dykes are horizontal, while sills are vertical. (B)</p> Signup and view all the answers

What characterizes the formation of batholiths?

<p>They result from the cooling and solidification of magma below the surface. (A)</p> Signup and view all the answers

What leads to the formation of karst landscapes in limestone?

<p>Dissolution of limestone by carbonic acid (D)</p> Signup and view all the answers

What distinguishes laccoliths from lopoliths?

<p>Laccoliths cause uplift, while lopoliths cause downward sagging. (D)</p> Signup and view all the answers

What results in the formation of metamorphic rocks?

<p>Extreme pressure and temperature without melting (C)</p> Signup and view all the answers

What property of the Earth's inner core prevents it from melting despite extreme heat?

<p>Intense pressure (D)</p> Signup and view all the answers

Which layer of the Earth is characterized by being capable of flow due to its plastic-like rock composition?

<p>Mantle (A)</p> Signup and view all the answers

What is the primary composition of the Earth's outer core that contributes to its liquid state?

<p>Nickel (Ni) (C)</p> Signup and view all the answers

Which layer of the Earth is found beneath the Mohorovičić discontinuity (Moho)?

<p>Mantle (D)</p> Signup and view all the answers

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

<p>~900 km (A)</p> Signup and view all the answers

Which layer of the Earth marks the division into tectonic plates that float over the semi-fluid upper mantle?

<p>Crust (C)</p> Signup and view all the answers

At what temperature can the outer core of the Earth reach due to extreme temperatures?

<p>~5,000°C (B)</p> Signup and view all the answers

Which layer of the Earth is composed of solid but plastic-like rock that can flow?

<p>Mantle (B)</p> Signup and view all the answers

What determines the crystal size within an igneous rock?

<p>Rate of cooling (B)</p> Signup and view all the answers

How do dykes differ from sills in their orientation?

<p>Orientation in relation to existing rock layers (D)</p> Signup and view all the answers

What geological process leads to the formation of sedimentary rocks?

<p>Erosion and deposition (A)</p> Signup and view all the answers

What landform is characteristic of limestone karst landscapes?

<p>Caves and springs (C)</p> Signup and view all the answers

Which type of rock undergoes transformation under extreme pressure and heat without melting?

<p>Metamorphic rock (A)</p> Signup and view all the answers

How do laccoliths differ from lopoliths in their formation?

<p>Shape of intrusion (D)</p> Signup and view all the answers

What distinguishes intrusive igneous activity from extrusive igneous activity?

<p>Formation depth (D)</p> Signup and view all the answers

What is the key factor that influences the resistance to erosion and permeability of landforms?

<p>Type of rock (C)</p> Signup and view all the answers

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

<p>90 km (C)</p> Signup and view all the answers

Which layer of the Earth is primarily composed of nickel (Ni) and iron (Fe)?

<p>Outer Core (C)</p> Signup and view all the answers

What is the approximate maximum temperature that the mantle of the Earth can reach?

<p>$5,000$°C (B)</p> Signup and view all the answers

Which layer of the Earth marks the boundary between the mantle and the crust?

<p>Mohorovičić discontinuity (C)</p> Signup and view all the answers

What causes the inner core of the Earth to remain solid despite extreme heat?

<p>Immense pressures (A)</p> Signup and view all the answers

Which layer of the Earth is characterized by being able to flow due to its plastic-like rock composition?

<p>Mantle (A)</p> Signup and view all the answers

What is the depth range of the mantle, extending downward from beneath the crust?

<p>$2,000-3,000$ km (A)</p> Signup and view all the answers

How thick is the outer core of the Earth?

<p>$2,250$ km (C)</p> Signup and view all the answers

Which layer of the Earth forms the upper part of the lithosphere?

<p>Crust (B)</p> Signup and view all the answers

What is characteristic of the Earth's outer core due to the extremely high temperatures it experiences?

<p>Liquid state (C)</p> Signup and view all the answers

What is a key factor influencing the formation of large crystals in igneous rocks?

<p>The rate of cooling (D)</p> Signup and view all the answers

What characteristic distinguishes laccoliths from lopoliths?

<p>Shape (D)</p> Signup and view all the answers

What geological process forms dykes and sills in intrusive igneous activity?

<p>Magma intrusion (A)</p> Signup and view all the answers

What type of rocks are most likely to exhibit karst landscapes?

<p>Sedimentary rocks (C)</p> Signup and view all the answers

What factor primarily determines the resistance to erosion and permeability of landforms?

<p>Type of rock (C)</p> Signup and view all the answers

Which type of rock is characterized by the alteration of mineral composition and structure under extreme pressure and temperature?

<p><strong>Metamorphic</strong> rock (C)</p> Signup and view all the answers

What distinguishes sills from dykes in intrusive igneous activity?

<p>Sills are horizontal while dykes are vertical. (C)</p> Signup and view all the answers

What is a distinguishing feature of batholiths in the rock cycle?

<p>They are large masses of igneous rock that form deep below the Earth's surface. (B)</p> Signup and view all the answers

How do sedimentary rock landforms differ from igneous rock landforms?

<p>Sedimentary rock landforms form due to weathering and deposition of sediments. (A)</p> Signup and view all the answers

What is a key factor influencing the formation of sedimentary rocks?

<p>Weathering and erosion of existing rocks (B)</p> Signup and view all the answers

Which process leads to the formation of tors as described in the text?

<p>Erosion of surrounding material (A)</p> Signup and view all the answers

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