2. Internal and External face of the Earth
i. Give answer to the following
questions approximately in 1-15 words.
i.
How many shells of the earth are there? Name them.
ii.
How many types of Rocks are found on the earth.
iii.
Write down about the Mantle part of the earth.
iv.
Why the 'Sial’ layer is known by this name?
v.
By which name the inner most part of the earth called? What are the components
of this part?
vi.
Write about the Mantle part of the earth.
vii.
How can we avoid soil erosion?
II. Give answer to the following questions approximately in 50-60 words.
i.
What are igneous rocks? How many types are there in these rocks? Write about
the Intrusive rocks
ii.
What are the Sedimentary Rocks? How many types are there of these rocks?
iii.
Write about the Metamorphic Rocks, give specific example of these rocks.
iv.
Classify the minerals available in the earth's crust
v.
In which category mica is classified, for what purpose is it used?
vi.
Which mineral is called as 'Liquid Gold'. Give brief introduction.
vii.
Write down the importance of the soil on the earth.
III. Write the answer to the following
questions approximately in 125-130 words.
i. Write in detail about the rocks available
on the earth.
ii.
What are minerals? Which minerals are available on the earth? Classify them and
write about the metallic minerals.
iii.
What are mineral fuels? Give details of any mineral fuel.
iv.
Write in detail about the soil available in India.
Activity:
I.
Make a model of the earth showing its layers.
2.
Is soil erosion a serious problem? Discuss it in your class.
