What makes the narrow, rotating air column or vortex of a tornado visible?

What will be an ideal response?


Either the condensation of water vapor (which forms a cloud) or the debris suspended in the air, or some combination of these.

Environmental & Atmospheric Sciences

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What is the elevation of Point A?

The question is based on this contour line map with elevations shown in feet.
• North is to the top of the map.
• Streams are shown with dashed lines.
• A graphic scale for measuring horizontal distances is shown below the map.
• Estimate elevations between contour lines to the nearest half-contour interval; assume that the top of a
hill is one-half-contour interval higher than the highest contour line shown.


What will be an ideal response?

Environmental & Atmospheric Sciences

Discuss how Silurian and Devonian reefs differed from Cambrian reefs. What will be an ideal response?

Environmental & Atmospheric Sciences

No-till farming would be most beneficial for farmers ________

A) who typically experience minimal soil erosion B) using contour strip cropping C) who plant a cash crop every third year D) with steeply sloped fields E) whose cropland is in the Conservation Reserve Program

Environmental & Atmospheric Sciences

What are the requirements for a rock body to serve as a reservoir rock for hydrocarbons? What will be an ideal response?

Environmental & Atmospheric Sciences