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
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Distinguish the difference between cleavage and fracture.
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
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
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