An air parcel is considered unstable when it
A) either remains as it is, or changes its initial position.
B) continues to rise until it reaches an altitude at which the surrounding air has a similar temperature.
C) it resists displacement upward.
D) it ceases to ascend.
B
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A. miss his opponent. B. hit his opponent. C. same either way D. none of the above
Oxygen enters seawater mainly through the oxidation of metal ions in seawater
Indicate whether the statement is true or false
Which of the following can be a source of location errors?
A. errors in scanning and tracing B. errors from geometric transformation C. human errors in manual digitizing D. all of these are correct E. both human errors in manual digitizing and errors in scanning and tracing
The term used for the Earth’s present magnetic field polarity is “normal.” Indicate whether the statement is true or false