Question

Evidence of past craters are present on the Moon in large numbers, but not much on the Earth. This is because of which of the following reasons?
1. Presence of atmosphere on the Earth.
2. Tectonic processes.
3. Volcanism.
4. Rotation and revolution of the Earth.
Select the correct answer using the codes given below.

पूर्व क्रेटरों के साक्ष्य चंद्रमा पर बड़ी संख्या में मौजूद हैं,परन्तु पृथ्वी पर नहीं। यह निम्नलिखित में से किस कारण से है?
1. पृथ्वी पर वायुमंडल की उपस्थिति के कारण।
2. टेक्टोनिक प्रक्रियाएं के कारण।
3. ज्वालामुखी के कारण।
4. पृथ्वी के घूर्णन और संक्रांति के कारण।
नीचे दिए गए कूट का उपयोग करके सही उत्तर चुनें:

• A. 1 and 3 only
  
  केवल 1 और 3
• B. 1 and 2 only
  
  केवल 1 और 2
• C. 1, 2 and 3 only
  
  केवल 1, 2 और 3
• D. 1, 2, 3 and 4
  
  1, 2, 3 और 4

Answer 1

The correct option is C 1, 2 and 3 only


केवल 1, 2 और 3
Statement 1 is correct: Earth has weather, water, and plants and these act together to break apart and wear down the ground. Eventually, erosion can break a crater down to virtually nothing. On the other hand, the Moon has no atmosphere and hence almost no erosion. Thus, nothing can remove marks on its surface once they are made.
Statement 2 is correct: Tectonic processes cause earth’s surface to form new rocks, get rid of old rocks, and shift around over millions of years. On the other hand, the Moon has not had tectonics for billions of years, which gives a lot of time for craters to form and stay put.
Statement 3 is correct: On Earth, volcanic flows cover up impacts craters, but the moon has been without volcanism for around three billion years, which leaves impact craters uncovered.
Statement 4 is incorrect: Mars also rotates on its axis and revolves around the sun like that of the Earth. So, it doesn’t have any impact on craters.