Weathering and Formation of Rocks

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Questions and Answers

What is the process called when rocks are broken down into smaller pieces by physical forces without changing their chemical makeup?

  • Sedimentation
  • Chemical weathering
  • Mechanical weathering (correct)
  • Erosion

What is the result of sedimentation, when water or wind transports weathered materials?

  • Rock formation
  • Clay formation
  • Mineral formation
  • Soil formation (correct)

What is the primary cause of weathering that changes the chemical makeup of rocks?

  • Water
  • Wind
  • Gravity
  • Chemical reactions (correct)

What happens to small particles when water carries them away?

<p>They become silt (C)</p> Signup and view all the answers

What is the term for the breaking down of rocks and minerals?

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

What is the result of continuous weathering on large rocks?

<p>They become smaller rocks (C)</p> Signup and view all the answers

What is responsible for the breaking of rocks?

<p>Agents of weathering (D)</p> Signup and view all the answers

What is the result of mixing sand, silt, or clay with organic material?

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

What is an example of mechanical weathering caused by human activity?

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

What is the term for the process of rocks being broken down into smaller particles?

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

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Study Notes

Weathering and Its Effects

  • Weathering is the breaking down of rocks and minerals, a slow and continuous process that affects rocks and minerals.
  • Weathering crumbles rocks over time, breaking large pieces into smaller ones, common on mountainsides, rivers, and seashores.

Weathering Processes and Outcomes

  • Large particles become gravel, medium-sized particles become sand, and small particles become clay due to weathering.
  • Water carries small particles away, forming silt.
  • When sand, silt, or clay mix with organic material, they become soil.
  • Soil forms through sedimentation, where water or wind action transports weathered materials.

Types of Weathering

  • There are two types of weathering: mechanical weathering and chemical weathering.
  • Agents of weathering, such as gravity, water, wind, ice, plants, animals, people, and chemical reactions, break rocks.

Mechanical Weathering

  • Mechanical weathering breaks rocks into small pieces by physical forces without changing their chemical makeup.
  • Gravity, water, people, wind, plants, and animals are agents of mechanical weathering.
  • Gravity exposes new surfaces of rocks to weathering agents like wind and water, causing huge rocks to roll downhill.
  • Evidence for gravity's action includes the rolling of rocks downhill.

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