Geotectonics - Geography GK Objective Questions with Answers

26 A hole in Earth's crust through which magma comes to Earth's surface is known as
A Crater
B Vent
C Cone
D Pipe

Answer: Option [B]
27 Layers of volcanic materials that build up around vent to form a cone-shaped structure are known as
A Crater
B Vent
C Cone
D None of the above

Answer: Option [C]
28 Fluidity of lava is determined by amount of
A silica
B copper
C iron
D zinc

Answer: Option [A]
29 Top of magma is forced onto Earth's surface is known as
A Pipe
B Cone
C Vent
D Crater

Answer: Option [D]
30 Volcanoes that have erupted in historic times and are still likely to erupt, are known as
A Instinct volcanoes
B Active volcanoes
C Dormant volcanoes
D Extinct volcanoes

Answer: Option [C]

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