Question 1. A volcanic eruption is most likely to be violent when _____
Answer: The lava is viscous.
Question 2. If the lava is of ‘acidic’ in nature, the eruption will be of _____
Answer: Explosive type.
Question 3. The ‘Hawaiian type volcano are characterised by _____
Answer: Silent effusion of lava without any explosive activity.
Question 4. The most violent type of all the eruptions is _____
Answer: Pelean type
Question 5. The most important constituent of volcanic gases, which contributes nearly 90% of the total content of volcanic gases, is _____
Question 6. The ‘Light House of the Mediterranean’ is _____
Answer: Stromboli volcano.
Question 7. Visuvious is an example of _____
Answer: Dormant volcano.
Question 8. ‘The Valley of Ten Thousand Smokes’ is _____
Answer: Katmai valley.
Question 9. Who propounded The Elastic Rebound Hypothesis of Earthquake?
Answer: H.F. Reid.
Question 10. At the time of earthquake, the shaking is the strongest near the _____
Question 11. The place of origin of an earthquake inside the earth is called, its _____
Question 12. ‘Isodiastrophic’ is _____
Answer: line of equal damage.
Question 13. Observations have shown that most of the earthquakes originate at a depth _____
Answer: from 50 to 100 km.
Question 14. Several interconnected mountains constitute a _____
Question 15. A well will always contain water if _____
Answer: the bottom of the well is far below the water table.
Question 16. The formation of a river delta involves the processes of _____
Answer: deposition, corrosion and transport.
Question 17. The erosive power of a river depends most upon its _____
Answer: speed and volume.
Question 18. Deposition by a river increases when _____
Answer: the volume of water in the river increases.
Question 19. The load of river comes mainly from _____
Answer: the bluffs which are undercut by the river in its upper course.
Question 20. Most rivers flow slowly near the sea level and in consequence their main action is depositional. A river in this stage would not show signs of _____
Answer: deposits of large boulders.
Question 21. A drainage system which is no way related to the structure of the region where it occurs is called _____
Answer: superimposed drainage pattern.
Question 22. The features, which may suggest that a drainage system has been rejuvenated, are _____
Answer: knick points, paired river terraces and incised meanders.
Question 23. “The wearing away of the sides and bottom of a river’s channel by the load carried by a river” is called _____
Question 24. Chemical weathering takes place most effectively when it is _____
Answer: hot and wet.
Question 25. The ‘Geanticlines’ mean _____
Answer: the warped up sedimentary area during crustal bending.
Question 26. When compression takes place on the crust due to endogenetic forces a part of the crust is raised up and is known as _____
Question 27. In the folds, when one limb lines over the other in a horizontal position it is known as _____
Answer: recumbent fold.
Question 28. A ‘Fanfold’ is _____
Answer: a great anticline which has many small anticlines and synclines.
Question 29. A broken and separated limb of a recumbent fold when found away from its place is known as _____
Question 30. ‘Gouge’ is _____
Answer: a kind of rock-waste, produced by the movement of blocks.
Question 31. In a fault, the block that moves up is called _____
Answer: Hanging wall.
Question 32. Which pair is wrong?
(i) Hanging wall—the block that moves up (upthrust side).
(ii) Food wall—the block that moves down (down-throw side)
(iii) Escarpment—when a block slips down along the fault plane.
Question 33. The land form produced by faults are _____
Answer: Grabben, Horst, Drag.
Question 34. Example of exogenetic forces are _____
Answer: Rivers, Animals, under -ground water.
Question 35. Rift valleys are caused by _____
Answer: endogenetic forces.
Question 36. The forces which start to destroy the uneveness on the law surface are known as _____
Answer: exogenetic forces.
Question 37. ‘Step fault’ is a situation in which _____
Answer: the crust is broken into several parallel faults and looks like a flight to stairs.
Question 38. ‘Traction’ is a process in which _____
Answer: transportation of debris by river through creeping and rolling takes place.
Question 39. Physical weathering becomes important in _____
Answer: arid climates.
Question 40. ‘Freeze-thaw’ is an example of _____
Answer: physical weathering.
Question 41. ‘Tor’ is _____
Answer: weathered blocks of rocks in round-edged shape.
Question 42. Which rocks are formed under high pressure and high temperature?
Question 43. ‘Geographical cycle’ means _____
Answer: the evolution of landscape in a cycle in which the various stages of development pass through in a definite order.
Question 44. “Any landform is a function of its structure, process and time”, propounded by _____
Question 45. Who divided the evolution of landforms in three stages viz. youth, maturity and old stage?
Question 46. What makes the water flow from higher to lower levels?
Question 47. ‘Valley deepening’ does not depend on _____
Answer: solution action.
Question 48. ‘Rock Benches’ are associated with _____
Answer: cross profile of a river.
Question 49. ‘Beheaded stream’ is a special case of _____
Answer: obsequent valleys.
Question 50. A valley which is neither determined by the structure of the land nor the nature of the slope, is called _____
Answer: insequent valley.