IGNOU BGGCT-131 December 2020 Previous Year Question Paper

Q1.Answer any five of the following questions :

(i) Define ‘Epeirogenetic’ and ‘Orogenetic’ movements.

(i) Differentiate between “Moho Discontinuity’ and ‘Weichert-Gutenberg Discontiniuty’.

(ii) Differentiate between ‘Climate’ and ‘Weather’.

(iv) Define Planetary winds and mention their types.

(v) Give two differences between ‘terrigenous deposits’ and ‘pelagic deposits’.

(vi) Define ‘zone of aeration’ and ‘zone of saturation’.

(vii) Differentiate between ‘Monistic’ and ‘Dualistic’ concept of the origin of solar system and give an example of each.

(viii) Define ‘weathering’ and ‘mass wasting’.

Q2.Critically explain the ‘Continental Drift Theory of Wegner’.

Q3.Critically explain the planetesinal hypothesis and tidal hypothesis of the origin of solar system.

Q4.Discuss the concept of ‘cycle of erosion’ as given by Davis. Illustrate your answer with a suitable diagram.

Q5.Define ‘Geosphere’. Describe the different components of Geosphere.

Q6.Define ‘Isotherms’. Describe six factors affecting horizontal distribution of temperature on earth.

Q7.Give a detaild account of the vertical layers of atmosphere based on temperature differences between them; with suitable diagram.

Q8.What are ocean currents ? Describe the currents of Atlantic ocean with the help of a suitable map and explain their influence on the coastal climatic condition.

Q9.Define ‘Hypsometric curve’. Explain any four different relief features of the ocean floor with the help of a suitable sketch.

Q10.Answer any two of the following questions in about 600 words each : 2x10=20 @ Explain hydrological cycle with the help of a suitable diagram.

(i) Discuss five factors affecting the salinity of the oceans.

(ii) Explain the concept of isostasy as the earth’s balance.

(iv) Discuss the formation of metamorphic rocks and their characteristics. aif! aif!

(viii) ‘agar’ SK ‘Fed AT’ (Mass wasting)