A stream or river that flows all year is referred to as
A. perennial.
B. a tributary.
C. ephemeral.
Answer: A
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Tens of thousands of years ago, languages may have been joined together as
A) branches. B) superfamilies. C) groups. D) lingua franca. E) families.
The EROI (energy returned on investment) ratio is calculated as
a. Energy invested/Energy returned. b. Energy invested × Energy returned. c. Energy returned/Energy invested. d. Energy returned × Energy invested.
Why does a satellite in elliptical orbit gain speed as it moves closer to the planet? When is its kinetic energy the greatest? The least? Where is its potential energy greatest? The least?
What will be an ideal response?
Convectional lifting results when air from different directions flows toward an area of low pressure
Indicate whether the statement is true or false