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Inside our Earth Test - 5

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Inside our Earth Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0
    ..........are the changed form of Igneous and Sedimentary rocks
    Solution
    When igneous and sedimentary rocks experience heat and pressure,metamorphic rocks are formed.
  • Question 2
    1 / -0
    The lightest layer of the earth's crust is ___________.
  • Question 3
    1 / -0
    Which one is an example of Sedimentary Rock ?
    Solution
    Sandstone is an example of sedimentary rock formed from grains of sand.
  • Question 4
    1 / -0
    Of the total volume of the earth, which layer forms the major part?
  • Question 5
    1 / -0
    Extrusive (Intrusive) rocks are forms of
  • Question 6
    1 / -0
    Which of the following rocks is different from the remaining three on the basis of its mode of origin ?
    Solution
    Limestone, Sandstone, and Shale are examples of sedimentary rocks but Marble is an example of metamorphic rock. 
    Sedimentary Rocks - These rocks are formed by the accumulation or deposition of small particles and subsequent cementation of minerals or organic particles on the floor of oceans or other bodies of water at the Earth's surface.
    Metamorphic rocks - When the physical and chemical properties of the existing rocks get changed due to high heat and pressure, then metamorphic rocks are formed. Marble, slate are examples of metamorphic rocks.
  • Question 7
    1 / -0
    SIAL and SIMA are the divisions of __________.
    Solution
    The topmost layer of the earth is solid, the thinnest and the lightest and is known as lithosphere. The lithosphere has two layer- the outer part and the inner part. The outer part which is immediately below the newer sedimentary formation, i.e, crust. The outer layer of lithosphere mainly found under the continent and inner layer it mostly found partly under oceans. The inner layer again has three layers, i.e, SIAL which is made of silica and aluminum. The average thickness is 8 to 100 km. The layer next to it is SIMA makeup of silica and magnesium and an average thickness of this layer is 100 to 2900 km. The innermost layer is NIFE madeup of nickel and ferrous and the density is 5.1 to 13.
  • Question 8
    1 / -0
    Rock cycle is a continuous chain through which  ___________________.
    Solution
    Rocks do not remain in their original form for long but may undergo transformation. Rock cycle is a continuous process through which old rocks are transformed into new ones.
  • Question 9
    1 / -0
    The rock cycle is the process of formation of _______________.
    Solution
    • Rock cycle is the transition of rocks of 3 basic types viz igneous, sedimentary and metamorphic into each other in a cyclic manner.
    • Primary rock is an igneous rock which is formed after solidification of lava. It may then get eroded and settled as various layers to form sedimentary rocks. The sedimentary rocks get metamorphosised under high pressure and temperature beneath the earth crust which forms metamorphic rocks.
    • Finally, all types of rocks may get subducted deep inside the earth were under extreme temperatures they get melted leading to the formation of liquid magma and the cycle repeats.
    • Thus all options are part of this cycle and option D is correct.
  • Question 10
    1 / -0
    The name of the layer of the Earth that separates the crust from the core is the ___?
    Solution

    Earth mainly consists of four layers namely crust, mantle, outer core and inner core.

    Mantle is the widest of all the layers, which is 1800 miles thick. It is composed mostly of silicate rocks rich in magnesium and iron. It is found beneath the earth’s crust. The temperature of this layer is 1600 degrees Fahrenheit at the top to about 4000 degrees Fahrenheit near the bottom.

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