front 1 Metamorphism occurs when a rock ___________. | back 1 experiences conditions that are significantly different from those that formed the rock |
front 2 The low grade metamorphism of shale produces ________. | back 2 slate |
front 3 Mountain building causes metamorphism because __________. | back 3 all the above |
front 4 The most important agent(s) of metamorphism, according to your text, is (are) ___________. | back 4 heat |
front 5 The major role of thermal energy (heat) in metamorphism is _________. | back 5 driving chemical reactions that head to recrystallization |
front 6 In an area where the temperature increase with depth averages 20 degrees C per kilometer, the temperature at a depth of 5 kilometers would be __________. | back 6 100 degrees C |
front 7 The quartz in granite begins to melt at 650 degrees C, so if we find a migmatite where quartz has melted in a granitic rock and we know the temperature in the region increased with depth by 25 degrees C per kilometer, we could estimate the depth that the rock had been at to be about __________. | back 7 26.0 km |
front 8 Confining pressure is where _________. | back 8 forces area applied equally in all directions |
front 9 When rocks experience high temperatures and differential stresses deep in the Earth, their grains tend to _________. | back 9 flatten and elongate |
front 10 Recrystallization during metamorphism causes grains to grow longer in the __________. | back 10 direction perpendicular to the compressional stress |
front 11 Slate is _________ than shale. | back 11 denser |
front 12 Which of the following is not an example of a foliation in a metamorphic rock? | back 12 bedding planes and strata |
front 13 Which of the following changes may occur during metamorphism? | back 13 all the above |
front 14 The common rock produced by the metamorphism of limestone is ____________. | back 14 marble |
front 15 ________ is composed of alternating bands of light and dark silicate minerals. | back 15 Gneiss |
front 16 The primary agent of contact metamorphism is ________. | back 16 heat |
front 17 Which of the following lists the rocks in the order of increasing grain size and increasing grade of metamorphism? | back 17 slate, phyllite, schist |
front 18 The very large crystals of quartz, feldspar, and muscovite found in pegmatites form from | back 18 the final crystallizing parts of magma |
front 19 The minerals gold, silver and mercury are often found in ________. | back 19 hydrothermal veins |
front 20 List three agents of metamorphism. | back 20 heat, pressure, fluids |
front 21 What type of stress (pressure) is illustrated in the diagram below? | back 21 lithostatic or confining |
front 22 What type of stress (pressure) is illustrated in the diagram below? | back 22 differential press |