1. When the jet stream exhibits zonal flow, surface highs andlows are generally ________ and move eastward across the UnitedStates relatively ________. Group of answer choices

weak, slow

strong, slow

weak, fast

strong, fast

For a surface low-pressure center to intensify, the upper-leveltrough should be located ________ the surface low.

Group of answer choices

to the east of

to the west of

directly over

When the jet stream exhibits meridional flow, surface highs andlows are generally ________ and move eastward across the UnitedStates relatively ________.

Group of answer choices

weak, slowly

strong, fast

weak, fast

strong, slowly

The vertical pressure gradient force in the atmosphere istypically about 10,000 times the magnitude of the horizontalpressure gradient force, yet vertical motions are normally muchsmaller than horizontal motions. This is due to the ________.

Group of answer choices

negligible Coriolis effect in vertical motion

equal and opposite reaction of the earth’s surface to thedownward directed vertical pressure gradient force

opposing and near-balancing force of gravity acting downward onair

fact that gravity does not act on horizontally moving airparcels