Why are some minerals useful as metamorphic index minerals, while other minerals are not?
What will be an ideal response?
A mineral is useful as a metamorphic index mineral if it occurs only in a restricted range of temperature and/or pressure. A mineral is not useful as a metamorphic index mineral if to occurs over a wide range of temperature and pressure.
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An acid is a substance that combines with a hydrogen ion in solution
a. True b. False
"Edge effects" become particularly problematic when
A. forests undergo biodiversity changes as a result of climate change B. trying to manage and protect island biodiversity C. preserves have a very large area and a roughly circular shape D. formerly large habitats are reduced to small fragments
The type of plate boundary at which many of the world's major metallic ore deposits are associated is ____________________.
Fill in the blank(s) with the appropriate word(s).
What is true about pressure differences on the ground?
A. High or low areas are relative to nearby values. B. Troughs are related to relative high pressure areas. C. High or low areas are always related to fixed values. D. Ridges are related to relative low-pressure areas. E. Pressure is mapped using lines called millibars.