A mineral has a value of 8 on the Mohs hardness scale. What could this represent?
A) The mineral is relatively hard.
B) The mineral is the hardest of all minerals.
C) The mineral is relatively soft.
D) The mineral is the softest of all minerals.
Answer: A
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The world geography means:
A) to write about the sun. B) to write about the stars. C) to write about Earth. D) to write about Mars. E) to write about Venus.
Consider the history of a single crystal of quartz. Describe how could this quartz grain could (a) form in a granite, (b) become incorporated into a sandstone, and (c) be transformed into a quartzite?
Explain the processes which act on the quartz crystal and the transformations it experiences. Detail the processes which would take place along each portion of this journey. What will be an ideal response?
Why are inlets through barrier bars or barrier islands not closed by longshore drift of sand?
a. Such inlets are always the outlets for onshore rivers to reach the sea, so they flush the sand out. b. Rapid flow of water back and forth through the inlet as tides rise and fall keeps it clear. c. Longshore sand drifted into such inlets drops into deeper water, so it drifts out to sea. d. Sand drifted into such inlets encounters brackish water from the inlet and dissolves. e. Sand drifted into such inlets is carried into the lagoon by incoming waves.
Large, heavy snowflakes are associated with moist air and temperatures well below freezing
a. True b. False