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3. Match the following.
i) Core
(a) Earth's surface
(ii) Minerals (b) Used for roads and buildings
(ul) Rocks
(c) Made of silicon and alumina
(iv) Clay
(d) Has definite chemical composition
(v) Sial
(e) Innermost layer
(1) Changes into slate
(g) Process of transformation of the rock
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Answer:
1. Core -Earth Surface 2. Minerals- Made of Silicon and alumina 3. Rocks- Used for building and road 4.Clay -Has definite Composition 5.Sial Changes in to slate
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