Podcast
Questions and Answers
When salt crystallizes, it pushes apart surrounding grains and weakens the rock, causing it to disintegrate when exposed to ______ or rain.
When salt crystallizes, it pushes apart surrounding grains and weakens the rock, causing it to disintegrate when exposed to ______ or rain.
wind
Thermal Expansion results from expansion and contraction of rocks caused by temperature change/different stresses which cause rocks to ______.
Thermal Expansion results from expansion and contraction of rocks caused by temperature change/different stresses which cause rocks to ______.
crack
Chemical Weathering - decomposes rocks through a chemical change in its minerals. A process wherein rock materials are changed into other substances that have different physical and chemical compositions. Some agents of chemical weathering include water, strong acids, and ______.
Chemical Weathering - decomposes rocks through a chemical change in its minerals. A process wherein rock materials are changed into other substances that have different physical and chemical compositions. Some agents of chemical weathering include water, strong acids, and ______.
oxygen
Erosion - the transportation of weathered rocks. Agents like running water or rivers, wind, gravity, groundwater, wave currents, and glaciers contribute to ______.
Erosion - the transportation of weathered rocks. Agents like running water or rivers, wind, gravity, groundwater, wave currents, and glaciers contribute to ______.
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Weathering is the disintegration and decomposition of rocks into smaller components. Types of Weathering include ______ Weathering and Chemical Weathering
Weathering is the disintegration and decomposition of rocks into smaller components. Types of Weathering include ______ Weathering and Chemical Weathering
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Mass Wasting - Mass movement or downslope transport of rocks, soil and regolith ______.
Mass Wasting - Mass movement or downslope transport of rocks, soil and regolith ______.
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Frost Wedging and Unloading (Pressure Release) are examples of ______ Weathering
Frost Wedging and Unloading (Pressure Release) are examples of ______ Weathering
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Exogenic Processes are responsible for transforming rocks into ______
Exogenic Processes are responsible for transforming rocks into ______
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Exogenic Processes are external processes that occur at or near the surface of the earth. These processes are part of the ______ cycle
Exogenic Processes are external processes that occur at or near the surface of the earth. These processes are part of the ______ cycle
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It occurs when overlying rock is eroded away, causing the outer rock to expand more than the rock below. Joints also expand when plants growing on its surface pry it open. This is an example of ______ Weathering
It occurs when overlying rock is eroded away, causing the outer rock to expand more than the rock below. Joints also expand when plants growing on its surface pry it open. This is an example of ______ Weathering
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Weathering - disintegration and decomposition of rocks into smaller components. Types of Weathering include Mechanical Weathering and ______ Weathering
Weathering - disintegration and decomposition of rocks into smaller components. Types of Weathering include Mechanical Weathering and ______ Weathering
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Mass Wasting - Mass movement or downslope transport of rocks, soil and regolith ______.
Mass Wasting - Mass movement or downslope transport of rocks, soil and regolith ______.
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Chemical Weathering - decomposes rocks through a chemical change in its minerals. A process wherein rock materials are changed into other substances that have different physical and chemical compositions. Some agents of chemical weathering include water, strong acids, and ______.
Chemical Weathering - decomposes rocks through a chemical change in its minerals. A process wherein rock materials are changed into other substances that have different physical and chemical compositions. Some agents of chemical weathering include water, strong acids, and ______.
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It occurs when overlying rock is eroded away, causing the outer rock to expand more than the rock below. Joints also expand when plants growing on its surface pry it open. This is an example of ______ Weathering
It occurs when overlying rock is eroded away, causing the outer rock to expand more than the rock below. Joints also expand when plants growing on its surface pry it open. This is an example of ______ Weathering
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Exogenic Processes are responsible for transforming rocks into ______
Exogenic Processes are responsible for transforming rocks into ______
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When salt crystallizes, it pushes apart surrounding grains and weakens the rock, causing it to disintegrate when exposed to ______ or rain.
When salt crystallizes, it pushes apart surrounding grains and weakens the rock, causing it to disintegrate when exposed to ______ or rain.
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Thermal Expansion results from expansion and contraction of rocks caused by temperature change/different stresses which cause rocks to ______.
Thermal Expansion results from expansion and contraction of rocks caused by temperature change/different stresses which cause rocks to ______.
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Chemical Weathering - decomposes rocks through a chemical change in its minerals. A process wherein rock materials are changed into other substances that have different physical and chemical compositions. Some agents of chemical weathering include water, strong acids, and ______.
Chemical Weathering - decomposes rocks through a chemical change in its minerals. A process wherein rock materials are changed into other substances that have different physical and chemical compositions. Some agents of chemical weathering include water, strong acids, and ______.
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Mass Wasting - Mass movement or downslope transport of rocks, soil and regolith ______.
Mass Wasting - Mass movement or downslope transport of rocks, soil and regolith ______.
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Erosion - the transportation of weathered rocks. Agents like running water or rivers, wind, gravity, groundwater, wave currents, and glaciers contribute to ______.
Erosion - the transportation of weathered rocks. Agents like running water or rivers, wind, gravity, groundwater, wave currents, and glaciers contribute to ______.
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Study Notes
Weathering and Erosion Processes
- Salt crystallizes in rocks, pushing apart surrounding grains and weakening them, leading to disintegration when exposed to moisture or rain.
- Thermal expansion occurs due to temperature fluctuations, resulting in the expansion and contraction of rocks, which can cause fracturing.
- Chemical weathering involves the decomposition of rocks through changes in their mineral composition, altering their physical and chemical properties.
- Agents of chemical weathering include water, strong acids, and oxygen, which facilitate these chemical reactions.
Types of Weathering
- Weathering divides into Mechanical Weathering and Chemical Weathering.
- Mechanical weathering includes processes such as frost wedging and unloading (pressure release), which physically break down rocks without altering their chemical structure.
- Chemical weathering transforms rock materials into different substances, significantly altering their characteristics.
Erosion and Transport
- Erosion is the transportation mechanism for weathered rocks and is influenced by agents like rivers, wind, gravity, groundwater, wave currents, and glaciers.
- The processes of erosion effectively shape landscapes by redistributing soil and rock materials.
Mass Wasting
- Mass wasting refers to the downslope transport of rocks, soil, and regolith due to gravity.
- This movement can occur rapidly or slowly and is influenced by factors such as moisture content and slope steepness.
Exogenic Processes
- Exogenic processes are responsible for transforming rocks through external actions at or near the Earth's surface.
- These processes play a central role in the rock cycle, contributing to the continuous changes and formation of rock types.
Joints and Plant Influence
- As overlying rock erodes, the reduction in pressure allows outer rocks to expand more than the underlying material, contributing to weathering.
- Plant growth can exacerbate this process by causing joints to widen when roots pry open the rock surface, showcasing mechanical weathering.
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Description
Test your knowledge on the geologic processes that constantly change Earth’s surface, including weathering, mass wasting, erosion, transportation, and deposition. Learn about the external processes that occur at or near the surface of the earth and their role in the rock cycle.
