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1
The Circle of illumination divides Earth into two hemispheres known as
» Explain it
C
An imaginary circle drawn in any direction on Earth’s surface and whose plane passes through the center of Earth is a great circle. It is called ‘great’ because this is the largest circle that can be drawn around Earth that connects any two points on the surface. Every great circle divides Earth into equal halves called hemispheres. An important example of a great circle is the circle of illumination, which divides Earth into light and dark halves day hemisphere and a night hemisphere.
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C
stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash.

Stratovolcanoes are sometimes called ‘composite volcanoes’ because of their composite layered structure built up from sequential outpourings of eruptive materials. They are among the most common types of volcanoes, in contrast to the less common shield volcanoes. Two famous stratovolcanoes are Krakatoa, best known for its catastrophic eruption in 1883 and Vesuvius, famous for its destruction of the towns Pompeii and Herculaneum in 79 AD. Both eruptions claimed thousands of lives. In modern times, Mount Saint Helens and Mount Pinatubo have erupted catastrophically.
 
physical Geography
4
Which one of the following is depositional landform?
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A
stalagmite is a type of rock formation that rises from the floor of a cave due to the accumulation of material deposited on the floor from ceiling drippings. Stalagmites may be composed of amberat, lava, minerals, mud, peat, pitch, sand, and sinter.
 
physical geography
5
Which of the following is/are direct source(s) of information about the interior of the Earth?

1. Earthquake wave 2. Volcano 3. Gravitational force  4. Earth magnetism

Select the correct answer using the codes given below
 
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A
Volcano:

A mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapour, and gas are or have been erupted from the earth's crust.
 
 
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Earthquake:
A sudden violent shaking of the ground, typically causing great destruction, as a result of movements within the earth's crust or volcanic action.

physical geography