Middle School Geography-'Lithosphere' worksheet
Q1. Answer the following questions in brief:
a)What is meant by ‘differentiation of the Earth’? ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
b)What is a Geode? How is it formed? ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
c)Distinguish between:
1.Igneous rocks and Sedimentary rocks ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
2.Magma and Lava ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Q2. Put the following statements in the correct box (question numbers only):
1.Consists of Iron and Nickel
2.Consists of Silicon, Aluminum and Magnesium.
3.Has a temperature as high as 5,000 ºC.
4.Gives rise to magma.
5.Has a thickness of about 60 km.
6.Has temperature between 870ºC and 2,200ºC.
| Crust | Mantle | Core |
|---|---|---|
|
|
Q3. Give reasons for the following:
1.Hills and slopes have a thin soil layer. ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
2.Inspite of the high temperatures in the interior of the Earth, rocks act as solid. ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Q4. Fill in the blanks:
a)The boundary between the crust and the mantle is called the _______________ discontinuity.
b)A _________ is any part of a once living thing preserved in a rock.
c)The term ‘igneous’ comes from the Latin word ignis which means _______________.
d)When a layer of soil on the surface, is removed over a large area by running water, it is called ________ erosion.
e)Metamorphic rocks are formed when igneous or sedimentary rocks are transformed by the action of intense ________ and ___________.
