MCQ'S ON THE INTERIOR OF THE EARTH

MCQ'S ON THE INTERIOR OF THE EARTH

1) Density of the core is highest because-

               a) due to heavy pressure of overlying rocks

               b) due to heavy temperature of overlying rocks

               c) due to heavy density of overlying rocks

               d) none of the above

 Ans- a

2) The average density of the earth is-

              a) 2.3 gm/cm³

              b) 5.5 gm/cm³

              c)  17.2 gm/cm³

              d)  6.5 gm/cm³

  Ans- b

3) Who discovered the core-

              a) Harold Jeffreys

              b) R.D Oldham

              c) Inge Lehman

              d) none of the above

 Ans- b

4) The inner core is solid first proved by-

              a) Inge Lehman

              b) Suess

              c) Cavendish

              d) R.D Oldham

Ans- a

5) The source of the Earth's magnetic field is-

              a) outer mantle

              b) liquid outer core

              c) lower crust

              d) outer crust

 Ans- b

6) On the basis of the satellite data the average density of the core of the earth is-

     a) 13 g cm3

     b) 12 g cm3

     c) 11 g cm3

     d) 10 g cm3

Ans-c

7) The core of the earth is made of the mixture of-

     a) Silica and nickel 

     b) Nickel magnesium

     c) Silica and magnesium 

     d) Nickel and iron

Ans-D

8) In the tectonically active areas,  temperature remains ________at the depth of 43 km from the surface of the earth.

      a) 900° C

      b) 1000° C

      c) 1100 °C

      d) 1200° C

Ans-b

9) In the tectonically stable areas, temperature at the depth of 40 km from the surface remains at-

     a) 500° C

     b) 550° C

     c) 600° C

     d) 650° C

Ans- a

10) The asthenosphere is-

      a) Totally moltel

      b) Partially moltel

      c) Totally solid

      d) Partially solid

Ans-b

11) Which waves cannot pass through liquid materials?

      a) Primary waves

      b) Secondary waves

      c) Surface waves

      d) All of the above

Ans-b

12) Pg - SG waves were discovered by-

      a) Jeffrey's

      b) Conard

      c) Wegener

      d) Daly

Ans-a

13) Lithosphere is mostly composed of-

       a) Amphibolite

       b) Granite

       c) Basalt

       d) Peridotite

Ans-b

14) Who has recognised two major layers in the earth?

        a) Daly

        b) Suess

        c) Harold Jaffrey

        d) Arthur Holmes

Ans- d

15) On the basis of velocity, seismic waves are divided into_______sets of waves-

         a) six

         b) five

         c) four

         d) three

Ans-.d