DAY – 17: Insights Self Study Guide for Prelims + Mains – 2015

There are many ways to prove that the earth is spherical. Which of the following is/are such ways?

1. Sunrise and sunset
2. Lunar eclipse
3. Ship’s visibility
4. Solar eclipse

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With reference to the Apollo 8 space mission of the United States Apollo space program, consider the following statements:

1. It was the first manned mission to land on the Moon, on 20 July 1969
2. It was the first manned spacecraft to leave Earth orbit, reach the Earth’s Moon, orbit it and return safely to Earth

Which of the above statements is/are correct?

Consider the following statements:

1. The linear distance of a degree of latitude at the pole is a little shorter than that at the equator
2. The average linear distance of a degree latitude is about 111 kilometers

Which of the above statements is/are correct?

With reference to twilight, consider the following statements:

1. Twilight is produced by sunlight scattering in the upper atmosphere, illuminating the lower atmosphere so that the surface of the Earth is neither completely lit nor completely dark
2. The further the Sun is below the horizon, the brighter the twilight (other things such as atmospheric conditions being equal)
3. Auroras are nothing but twilight

Which of the above statements is/are correct?

With reference to the International Date Line (IDL), consider the following statements:

1. Longitude 180 degree is demarcated as the International Date line passing through pole to pole
2. If a person crosses this line and move towards the West, a day will be subtracted from the calendar

Which of the above statements is/are correct?

With reference to Earth’s interior, consider the following statements:

1. Earth’s inner core is thought to a solid one despite extreme high pressure
2. Asthenosphere is located in the lower mantle

Which of the above statements is/are correct?

Which of the following mountains is/are Block mountains?

1. Rockies
2. Andes
3. Alps
4. Himalayas

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With reference to basic and acid lavas, consider the following statements:

1. Basic lava is highly viscous compared to acid lava
2. Acid lava has high percentage of silica

Which of the above statements is/are correct?

The Krakatoa Volcano, whose explosion is considered to be the loudest sound ever heard in modern history, with reports of it being heard up to 3,000 miles, is located

The river capture is mainly caused by

Which of the following conditions is/are favorable for the formation of a delta?

1. Active vertical and lateral erosion in the upper course of a river
2. A tideless coast
3. Shallow adjoining sea
4. No large lakes in the course of river

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Which of the following is/are not landforms of glaciation?

1. Eskers
2. Seifs
3. Drumlins
4. Zeugen
5. Roche Moutonnee

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Leading marine scientists have said that Coral reefs in the Indo-Pacific region, including the Great Barrier Reef, recover faster from major stresses than their Caribbean counterparts. Consider the following reasons:

1. The Indo-Pacific oceans have less seaweed compared to Caribbean
2. The Indo-Pacific region has a lot of herbivorous fishes
3. Presence of more warm ocean currents in the Indo-Pacific region

Which of the above reasons correctly explain the statement in the question?

Sargasso sea is located in