On surface charts, adjusting surface pressure to sea-level pressure eliminates the effects of:
a. variations in ridges and troughs
b. variations in elevation.
c. variations in temperature.
d. variations in pressure gradients.
b
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When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard and doesn't slip off, it is likely due to
A. inertia in motion. B. impulse. C. friction between his feet and the board. D. momentum change.
How can the extinction of bird species create a ripple effect through the rest of the ecosystem?
What will be an ideal response?
What is a major source of nitrate to coastal waters?
a. excretion b. soil runoff c. urea d. nitrifying bacteria e. atmospheric deposition
The ____________ Current is the shallow eastern boundary current of the North Atlantic. Fill in the blank(s) with the appropriate word(s)