Answer: Porphyry
Explanation:
This is an igneous rock that has a fine grained texture!
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Answer:
GNP/GDP
Explanation:
Real GDP per capita – gross domestic product. The nation's total economic output which is the same as a nation's income. GDP at purchasing power parity (PPP) takes into account the local purchasing power of the currency and is a better guide to actual living standards.
Ice has a lower melting point than rock
Tidal heating can melt internal ice, driving activity while only large rocky planets have enough heat for activity.