Which of the following is true about quartz?
A) It fractures in unpredictable patterns.
B) It forms eight-sided crystals.
C) It has two directions of cleavage.
D) It has three directions of cleavage.
Answer: A
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Which of the following gives the name for a coloured ring that appears around the shadow of an aircraft?
A. glory B. Heiligenshein C. brocken bow D. corona
Supercooled water is water which is:
A) a special form of ice. B) produced from dry ice. C) still liquid at temperatures below 0°C. D) part liquid and part solid.
A closed system means that neither energy nor matter enter or leave the system
Indicate whether the statement is true or false
The 500 mb pressure patterns displayed would bring ________ to Texas and the High Plains.
A. zonal flow, supporting storm formation B. a trough of low pressure, supporting storm formation C. a ridge of high pressure, suppressing storm formation D. zonal flow, neither suppressing nor supporting storms