Page 106 - SST Class 07

4. The inner core is made up of ______________ .
(a) SIMA (b) NIFE (c) SIAL

5. The magma which cools down below the earth’s crust changes into ______________ .
(a) intrusive rocks (b) extrusive rocks (c) lava
6. Coal is a type of ______________ rock.
(a) metamorphic (b) sedimentary (c) igneous
7. ______________ can be pressed into wires and sheets.
(a) chemical (b) metal (c) limestone

8. ______________ minerals are chiefly associated with sedimentary rocks.
(a) metallic (b) non-metallic (c) none of these
B. Match the following :
1. SIAL u u Nickel and iron.
2. SIMA u u The remains of dead plants and animals which have hardened into
rocks.

3. NIFE u u The material that forms the crust of the earth.
4. Magma u u Silica and magnesium.
5. Rock u u Silica and aluminium.
6. Fossils u u The molten material inside the earth.

C. Name the metals/rocks the following are made up of :
1. Taj Mahal ______________ 2. Red Fort ______________
3. Your school bell ______________ 4. Your mother’s earrings ______________
5. Your father’s vehicle ______________ 6. Your mother’s frying pan ______________

D. Fill in the blanks :
1. The ______________ is the outermost layer of the earth.
2. The inner core is made up of nickel and iron, also called ______________ .

3. Temperature rises at the rate of 1°C for every ______________ metres.
4. When the magma comes out on the earth’s surface, it is called ______________ .
5. ______________ rocks are also called primary rocks.
6. We get metals or chemicals from ______________ .

E. Put the following words into the correct categories :

Diorite, Basalt, Gneiss, Iron, Coal, Sandstone, Granite, Marble, Graphite, Petroleum, Limestone, Slate
Minerals Igneous rocks Metamorphic rocks Sedimentary rocks
______________ ______________ ______________ ______________

______________ ______________ ______________ ______________
______________ ______________ ______________ ______________
F. Answer in one word or phrase :

1. What is SIAL?
2. What is SIMA?
Contemporary Social Science-7
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