std 8th Geography ch 2 interior of the earth question answer| std 8th Geography ch2 Exercise answer
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. Tick the correct options in the box
(A) There are two layers in the crust.
(i) Inner and outer crust
Exercises
(ii) Continental and oceanic crust
(iii) Surface and oceanic crust
(iv) Mantle and Core
(B) Which element is found in both mantle
and crust?
(i) Silica
(ii) Magnesium
(iii) Aluminium
(iv) Iron
(C) Which of these minerals are found in
the core of the earth?
(i) Iron-magnesium
(ii) Magnesium-nickel
(iii) Aluminium- Iron
(iv) Iron-nickel
(D) The inner core is in which state?
(i) Gaseous
(ii) Solid state
(iii) Semi-solid state
(E) The outer core is made up of
(i) Iron
(ii) Gold
(iii) Hydrogen
(iv) Oxygen
(F) The layer of the earth on which we
live.
0000 000
(i) Primary waves
(ii) Secondary Waves
(iii) Surface waves
(iv) Oceanic waves
(i) Mantle
(ii) Core
(iii) Crust
(iv) Continental crust
(G) Which seismic waves can travel through
liquid medium?
0000000
Q2. Tell whether right or wrong. Correct the
wrong statement
(A) The density of various materials is not
the same in the interior of the earth.
(B) The core of the earth's interior is made
up of hard rock
(C) Secondary waves cannot pass through
outer core.
(D) Continental crust is made up of silica
and magnesium
Q3. Answer the following
(A) What are the two parts of the crust?
What is the basis of classification?
(B) Why is the upper mantle called the
asthenosphere?
(C) Magnetosphere of the earth is a result
of rotation. Explain.
Q4. Draw neat diagrams, label them and
explain.
(A) The interior of the earth
(B) Magnetic pole and equator
Q5. Give geographical reasons:
(A) There are discontinuities in the interior of
the earth.
(B)
There is correlation between the density
of metals and their location in the
interior of the earth.
Mantle is the centre of earthquake and
volcanic eruptions.
(C)
(D) The thickness of the crust below the
continents is less as compared to oceans.
(E) Earth is protected because of the
magnetosphere
ACTIVITY:
Prepare a model of the earth's interior.
.
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