1) Troughs along a frontal zone are the reason for a wind shift during frontal passage. True or false

2) An elongated region of warm air aloft (above ground) shows up on an isobaric map as higher heights and a ridge; the colder air shows as lower heights and a trough. True or false

3) _________are boundaries that separates dry, dense air and moist, lighter air. They are most often experienced in the central and southern Great Plains and can initiate severe thunderstorms.

4) In considering how wind will interact with topography (e.g., the shape, height, distribution of terrain -mountains, etc.) one must consider velocity of the wind, which is represented only by speed (e.g. 10 mph, etc.) and not relative direction of the wind. True or false