The Universe Part-5

Total Questions: 52

41. India was the part of ancient Gondwana land Supercontinent. It includes the following landmass of the present: [M.P.P.C.S. (Pre) 2008]

(a) South America
(b) Africa
(c) Australia
(d) All of above

Correct Answer: (d) All of above

Solution:In Carboniferous period, the whole land mass on the Earth was unified and was named as Pangea. This Pangea Supercontinent was surrounded by a superocean which was named 'Panthalassa' by Wegener. Due to the process of continental drift, the Pangea split into a northern most and southern most supercontinent. The northernmost landmass was known as Laurasia. The southernmost supercontinent was known as Gondwanaland which split into South- America, Australia, Africa, Madagascar, Antarctica, Arabian Peninsula and Peninsular India.

42. Cocos Plate the between: [63rd B.P.C.S. (Pre) 2017]

(a) Central America and Pacific Plate
(b) South America and Pacific Plate
(c) Red Sea and Persian Gulf
(d) Asiatic Plate and Pacific Plate
(e) None of the above / More than one of the above

Correct Answer: (a) Central America and Pacific Plate

Solution:Cocos Plate lies between Central America and Pacific Plate.

43. On the earth, originally, there was only one huge landmass which is known as - [U.P.P.C.S. (Mains) 2016]

(a) Panthalassa
(b) Pangea
(c) Laurasia
(d) Gondwanaland

Correct Answer: (b) Pangea

Solution:Originally, the huge landmass on earth was unified and known as 'Pangea'. Pangaea was a supercontinent. Oceans and continents are not fixed, they've been moving and changing for millions of years. This chapter explores the idea proposed by Wegener that continents once formed a single landmass called
Pangaea. This massive supercontinent was believed to be surrounded by an enormous ocean, which Wegener referred to as "Panthalassa" or 'all water'. Wegener's theory further explains that around 200 million years ago, this supercontinent Pangaea started to fracture and divide. Initially, it split into two large landmasses, known as Laurasia and Gondwanaland, which formed the northern and southern hemispheres respectively. Over time, these large landmasses continued to break apart into smaller continents, which over millions of years, have drifted to their current locations.

44. First fossil evidence for the existence of life on earth is- [U.P.P.C.S. (Mains) 2005]

(a) 0.3 million years back
(b) 3 million years back
(c) 5 million years back
(d) 10 million years back
(e) None of the above

Correct Answer: (e) None of the above

Solution:The first fossil evidence of the existence of life on Earth dates back to Archean Eon approx 3.5 billion years ago. Thus none of the options is correct.

45. Which of the following phenomena might have influenced the evolution of organisms? [I.A.S. (Pre) 2014]

1. Continental drift

2. Glacial cycles

Select the correct answer using the code given below.

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Correct Answer: (c) Both 1 and 2

Solution:

According to the book "Bhautik Bhugol Ka Swarup" written by Savindra Singh, the continental drift and glacial cycle both the phenomenon have influenced the evolution of organisms.

46. The theory that states "pieces of the Earth's crust are in constant, slow motion driven by movement in the mantle" is called: [69th B.P.S.C. (Pre), 2023]

(a) the theory of continental drift
(b) the theory of Pangaea
(c) the theory of plate tectonics
(d) the theory of plate boundaries

Correct Answer: (c) the theory of plate tectonics

Solution:The theory of plate tectonics states - 'pieces of the Earth's crust are in constant, slow motion driven by movementh's the mantle. According to this theory, the earth surface is composed of several plates. Plates are the solid and rigid upper part above the asthenosphere segmented into sevgid al blocks. Those blocks are known as lithospheric plates. There are seven major plates- Eurasian, African, Indo-Australian, Pacific, North American, South American and Antarctic plates. Significantly plates constitute the entire surface of the earth.

47. The process that continually adds new crust is: [69th B.P.S.C. (Pre), 2023]

(a) subduction
(b) earthquake
(c) seafloor spreading
(d) convection

Correct Answer: (c) seafloor spreading

Solution:The process that continually adds new crust is Seafloor spreading. Significantly, new crust is created by seafloor spreading. Old crust is destroyed by subduction. It is important to mention here that the two factors roughly balance each other. So the shape and diameter of the Earth remain unchange. Spreading seafloors are only an aspect of plate tectonics, another is subduction.

48. Folding is the result of- [53rd to 55th B.P.S.C. (Pre) 2011]

(c) Orogenic force
(a) Epeirogenic force
(b) Coriolis force
(d) Exogenic force

Correct Answer: (c) Orogenic force

Solution:

The Earth's surface experiences different types of forces. The orogenic force takes millions of years to build a mountain from plain and sea bed. These forces due to the interaction between tectonic plates, crumpled and pushed upward to form mountain range. Thus folding is the result of orogenic force.

49. Which of the following processes do not come under diastrophism? [M.P.P.C.S. (Pre) 2023]

(a) Orogenic
(b) Heterogenic
(c) Earthquakes
(d) Plate Tectonics
(e) None of the above

Correct Answer: (e) None of the above

Solution:Diamorphism is a phenomenon related to geomorphology. Even while internal forces keep the crust solid, there is constant stirring and shifting occurring in some part of the crust. Significantly earth movement, thus refers to the slow, abrupt or quick changes in the earth's crust caused by earthquakes or other motions influenced by internal forces. These includes abrupt movement and gradual or diastrophism movements. Heterogenic process does not come under diastrophism.

50. Consider the following: [I.A.S. (Pre) 2013]

1. Electromagnetic radiation

2. Geothermal energy

3. Gravitational force

4. Plate Movements

5. Rotation of Earth

6. Revolution of the Earth

Which of the following above are responsible for bringing dynamic changes on the surface of the Earth?

(a) 1,2,3 and 4
(b) 1,3,5 and 6
(c) 2,4,5 and 6
(d) 1,2,3,4,5 and 6

Correct Answer: (d) 1,2,3,4,5 and 6

Solution:The dynamic changes on the Earth's surface are caused by endogenic forces. In general, the origin of endogenic force is due to thermal asymmetry in the inner part of the Earth and compression and expansion of rocks. In addition to these electromagnetic radiation, gravitational force, rotation of Earth and its revolution functions are also liable for changes on the Earth's surface.

« Previous 1 2 3 456 Next »