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Tuesday, 11 June 2019

Geography - Questions and Answers - 29

796. Which are the most common metamorphic rocks? 
Schist, marble, slate, quartz­ite, gneiss, phyllite, serpent-serpentinite, eclogite & amphibolite 

797. The most rocks on the sur­face of the Earth is composed of which type of rocks? 
Sedimentary rocks 

798. What are the most common sedimentary rocks? 
Chalk, coal, gypsum, clay­ stone, limestone, dolomite, mudstone, shale, breccia, chert, siltstone 

799. The core constitutes nearly---­-- per cent of Earth's volume? 
15% 

800. What is the name of the discon­tinuity between the upper core & lower core? 
Lehmann discontinuity 

801. ---------- is sometimes used to refer the core of the Earth or sometimes the whole interior
Barysphere 

802. Which type of rock is known as 'the Mother of all rocks'? 
The igneous rocks 

803. Which type of rocks are gener­ally the hardest & heaviest of all rocks? 
Igneous rocks 

804. Which type of rocks are formed from the cooling of magma & often has large crystals? 
igneous rocks 

805. Which is the only rock that floats in water? 
Pumice 

806. Which rock is also known as 'the foam of the Sea'? 
Pumice 

807. What type of rock is pumice? 
Volcanic rock 

808. The igneous rocks formed at some depth in the Earth's crust is known as------- 
Plutonic rocks 


809. Which type of igneous rock is granite? 
Plutonic rock
810. Which type of igneous rock is basalt?
Volcanic rock 

811. Which type of rocks are also known as stratified rocks? 
Sedimentary rocks

812. Which type of rocks often con­tain fossils of animals, plants & other microorganisms?
Sedimentary rock 

813. ---------is an example for the mechanically formed sedimentary rock 
Sandstone

814. The peat, lignite & coal are generally known as ...... rocks
Carbonaceous (a type of sedimen­tary rock) 

815. The limestone undergoes metamorphic changes and forms 
Marble

816. Which type of mountains are formed along convergent plate boundaries? 
Fold mountains

817. The fold mountains are created through a process called .......
Orogeny 

9081vertically?
Block mountains 

819. At the time of the formation of the block mountains, the uplifted blocks are called ....... 
Horsts

820. In the formation of block moun­tains, the lowered blocks are called------ 
Graben

821. The Rhine Valley & the Vosges mountain in Europe are examples of ...... 
Block mountains

822. Which type of valleys are formed along the fault lines of block mountains? 
Rift valleys

823. What is the name of the moun­tain formed due to volcanic ac­tivity? 
Volcanic mountain

824. Mount Kilimanjaro & Mount Fujiyama are examples of----­
Volcanic mountains 

825. Which type of mountains are formed by denudation? 
Residual mountains
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