Geography

Weathering: physical, chemical, and biological

In Class 11 Geography, this topic from the chapter “Geomorphic Processes” explains weathering as the breakdown and alteration of rocks at or near Earth’s surface without transporting the material. Students learn how physical weathering acts through temperature changes, pressure release, and frost; how chemical weathering involves processes such as solution, carbonation, oxidation, hydration, and hydrolysis; and how plants, animals, and microorganisms drive biological weathering. The topic also connects climate, rock type, relief, and time with soil formation and landscape development.

Easy · Level 6 · 25 questions

Practice questions

01How do burrowing animals help in weathering?

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Answer and explanation

Correct answer: C. They loosen soil and rocky material

The direct answer is C: burrowing animals loosen soil and rocky material. Biological weathering includes the physical and chemical effects of living organisms. Step by step: an animal digs a burrow; its movement breaks and loosens soil or small rock fragments; the openings allow more air and water to enter; these can speed further weathering. Option C is correct because it directly describes the effect. Option A is nonsensical: animals cannot turn rock into the Sun. Option B is unrelated to the local action of burrowing and cannot dry oceans. Option D is unrelated because ordinary burrowing does not change Earth’s axis. The important idea is not that animals transport huge land masses, but that their roots, tunnels, and movements expose and loosen material. Memory cue: living organisms can crack, loosen, and expose rock.

Weathering: physical, chemical, and biological

Practice questions

01How do burrowing animals help in weathering?बिल बनाने वाले जीव अपक्षय में कैसे मदद करते हैं?

02How can road cutting or mining by humans affect weathering?मानव द्वारा सड़क काटना या खनन करना अपक्षय को कैसे प्रभावित कर सकता है?

03What is seen on the rock surface in exfoliation?पत्रीकरण में चट्टान की सतह पर क्या दिखाई देता है?

04How do rock edges change in spheroidal weathering?गोलाकार अपक्षय में चट्टान के किनारे कैसे बदलते हैं?

05What does differential weathering mean?भिन्नात्मक अपक्षय का अर्थ क्या है?

06In which condition is salt weathering more likely?किस स्थिति में लवण अपक्षय अधिक संभावित है?

07Why is water an important factor for weathering?अपक्षय के लिए जल एक महत्वपूर्ण कारक क्यों है?

08Which is the correct difference between weathering and erosion?अपक्षय और अपरदन में सही अंतर कौन सा है?

09If weathered material remains at its place, what will it be linked with?अपक्षयित पदार्थ यदि अपने स्थान पर पड़ा रहे तो उसे किससे जोड़ेंगे?

10Why is climate important in weathering?अपक्षय में जलवायु की भूमिका क्यों महत्वपूर्ण है?

11Why may physical weathering be dominant in dry regions?शुष्क क्षेत्रों में भौतिक अपक्षय क्यों प्रमुख हो सकता है?

12Which weathering is generally more active in hot and humid climate?गर्म और आर्द्र जलवायु में कौन सा अपक्षय सामान्यतः अधिक सक्रिय रहता है?

13Which pair is mismatched?कौन सा युग्म असंगत है?

14How does greater exposure of rocks affect weathering?चट्टानों का अधिक खुला होना अपक्षय को कैसे प्रभावित करता है?

15Acids formed by decay of organic matter can help in which weathering?जैविक पदार्थों के सड़ने से बने अम्ल किस अपक्षय में मदद कर सकते हैं?

16Which can be included among the products of weathering?अपक्षय के उत्पादों में कौन सा शामिल हो सकता है?

17How does weathering help in landform formation?अपक्षय स्थलरूप निर्माण में कैसे मदद करता है?

18Which factor can make chemical weathering reactions faster?किस कारक से रासायनिक अपक्षय की प्रतिक्रिया अधिक तेज हो सकती है?

19In which example does the chemical composition of rock mainly not change?किस उदाहरण में चट्टान का रासायनिक संघटन मुख्य रूप से नहीं बदलता?

20In which example is chemical change of minerals clear?किस उदाहरण में खनिजों का रासायनिक परिवर्तन स्पष्ट है?

21In which process does rock break or change while staying in its place?किस प्रक्रिया में चट्टान अपने स्थान पर रहते हुए ही टूटती या बदलती है?

22What can organic matter from plants form in soil?पेड़ पौधों से मिलने वाला जैविक पदार्थ मिट्टी में क्या बना सकता है?

23Why is the study of weathering important in geography?अपक्षय का अध्ययन भूगोल में क्यों जरूरी है?

24How can slope and altitude affect weathering?ढाल और ऊंचाई अपक्षय को कैसे प्रभावित कर सकते हैं?

25Why can porous rocks be more sensitive to weathering?छिद्रयुक्त चट्टानें अपक्षय के लिए अधिक संवेदनशील क्यों हो सकती हैं?

Analytics choices

01How do burrowing animals help in weathering?

02How can road cutting or mining by humans affect weathering?

03What is seen on the rock surface in exfoliation?

04How do rock edges change in spheroidal weathering?

05What does differential weathering mean?

06In which condition is salt weathering more likely?

07Why is water an important factor for weathering?

08Which is the correct difference between weathering and erosion?

09If weathered material remains at its place, what will it be linked with?

10Why is climate important in weathering?

11Why may physical weathering be dominant in dry regions?

12Which weathering is generally more active in hot and humid climate?

13Which pair is mismatched?

14How does greater exposure of rocks affect weathering?

15Acids formed by decay of organic matter can help in which weathering?

16Which can be included among the products of weathering?

17How does weathering help in landform formation?

18Which factor can make chemical weathering reactions faster?

19In which example does the chemical composition of rock mainly not change?

20In which example is chemical change of minerals clear?

21In which process does rock break or change while staying in its place?

22What can organic matter from plants form in soil?

23Why is the study of weathering important in geography?

24How can slope and altitude affect weathering?

25Why can porous rocks be more sensitive to weathering?