Which of the following best describes a pegmatitic texture?

A) Large crystals that form in a fluid-rich environment late in crystallization
B) Porous texture resulting from escaping volatiles
C) Fine-grained texture composed of microscopic crystals
D) Several large crystals surrounded by a fine-grained matrix


Answer: A

Environmental & Atmospheric Sciences

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Distinguish the difference between cleavage and fracture.

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Eighty calories of heat energy must be removed per gram of pure water at 0°C to form ice. This represents water's ____

A) latent heat of evaporation B) latent heat of fusion C) sensible heat D) temperature

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What type of rock likely composes the landscape shown in this photograph from the Investigation?

A. sedimentary rocks B. metamorphic rocks C. volcanic rocks, probably basalt D. granite

Environmental & Atmospheric Sciences

Igneous rocks with a texture that is so fine-grained that the crystals are too small to see are ____

A)aphanitic B)porphyritic C)glassy D)phaneritic E)pyroclastic

Environmental & Atmospheric Sciences