Worksheet: Geomorphic Processes | Geography Class 11 - Humanities/Arts PDF Download

Fill in the Blanks

Q1: The phenomenon of wearing down of relief variations of the surface of the earth through erosion is known as __________.

Q2: The energy emanating from within the earth is the main force behind __________ geomorphic processes.

Q3: __________ is the force that is keeping us in contact with the surface and is the force that switches on the movement of all surface material on earth.

Q4: Weathering is defined as mechanical disintegration and chemical decomposition of rocks through the actions of various elements of __________ and climate.

Q5: The three major groups of weathering processes are __________, physical or mechanical, and biological.

Q6: __________ is the process of solution, where solids are dissolved in water or weak acids.

Q7: In areas of curved ground surface, arched fractures tend to produce massive sheets or __________ of rock.

Q8: Frost weathering occurs due to the growth of __________ within pores and cracks of rocks during repeated cycles of freezing and melting.

Q9: Biological weathering is the contribution to or removal of minerals and ions from the weathering environment and physical changes due to growth or movement of __________.

Q10: Erosion cannot be significant if the rocks are not __________.

Assertion and Reason Based

Q1: Assertion: Exogenic processes derive their energy from the atmosphere.
Reason: Exogenic processes are genetically related to the atmosphere, hydrosphere, and biosphere.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false, but the reason is true.

Q2: Assertion: Weathering processes are responsible for breaking down rocks into smaller fragments.
Reason: Weathering aids in the enrichment and concentration of valuable ores.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false, but the reason is true.

Q3: Assertion: Expansion due to unloading and pressure release can result in exfoliation.
Reason: Exfoliation is primarily caused by chemical reactions between rocks and water.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false, but the reason is true.

Q4: Assertion: Salt crystallization is most effective in salt-weathering processes.
Reason: Salt crystals cause the expansion of minerals, leading to the disintegration of rocks.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false, but the reason is true.

Q5: Assertion: Gravitational forces can lead to rock fracture.
Reason: Physical weathering processes depend on applied forces.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false, but the reason is true.

Very Short Answer Type Questions

Q1: Define geomorphic processes.

Q2: Name one endogenic geomorphic process.

Q3: Name one exogenic geomorphic process.

Q4: What is the role of gravity in geomorphic processes?

Q5: How do endogenic forces affect the earth's surface?

Q6: What are the three major groups of weathering processes?

Q7: Explain the process of solution in weathering.

Q8: What causes frost weathering?

Q9: How does salt crystallization affect rocks?

Q10: How do biological activities contribute to weathering?

Short Answer Type Questions

Q1: Explain the concept of exogenic forces and endogenic forces. How do they affect the Earth's surface?

Q2: Describe the endogenic geomorphic process known as diastrophism. Provide examples.

Q3: What is volcanism, and how does it shape the Earth's surface?

Q4: Discuss the various types of chemical weathering processes and provide examples.

Q5: Explain the physical weathering processes and the forces responsible for them.

Q6: How does unloading and expansion contribute to physical weathering?

Q7: Describe the role of temperature changes in physical weathering.

Q8: How does salt weathering affect rocks, and in what conditions is it most effective?

Long Answer Type Questions

Q1: Discuss the significance of weathering in shaping the Earth's surface and its role in the formation of regolith, soils, and erosion.

Q2: Explain the interrelated weathering processes of hydration, carbonation, and oxidation. Provide examples of each.

Q3: Describe the role of biological activity in weathering and how it contributes to the exposure of new surfaces for chemical attack.

Q4: Explain the concept of exfoliation in weathering and its various forms, including exfoliation domes and tors.