QUESTION 12 rocks are often the source of metal ores such as gold, silver, and c

Question

QUESTION 12 rocks are often the source of metal ores such as gold, silver, and copper. O Sedimentary O Igneous O Weathered O Metamorphic QUESTION 13 while the oceanic crust is The continental crust of the earth is O thicker and lighter than the oceanic crust; similar in composition to the mantle O thicker and lighter than the oceanic crust; similar in composition to the inner core O similar in composition to the mantle; thicker and lighter than the continental crust similar in composition to the outer core; similar in composition to the mantle O similar in composition to the outer core; thicker and lighter than the continental crust

Explanation / Answer

12. Metamorphic rocks contain these types of gold and silver and other elements. This is because a rock undergoes various reactions and processes and finally forms some elements in it

13. The continental crust is thicker than the oceanic crust and lighter than oceanic crust. While the oceanic crust is similar in composition to the inner core.

The lava that come to the top forms basalt and forms oceanic crust.

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