Environmental Science
Suppose yesterday morning you noticed ice crystals (frost) on the grass, yet the minimum temperature reported in the newspaper was only 35o F. The most likely reason for this apparent discrepancy is that:

The thermometer was read incorrectly
The thermometer was in error
The newspaper reported the wrong temperature
The thermometer was read before the minimum temperature was reached for that day
Temperature readings are taken in instrument shelters more than 5 feet above the ground

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Environmental Science
During an equinox:

At noon the sun is overhead at the equator
The days and nights are of equal length except at the poles
The earth is not tilted toward nor away from the sun
All of these

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Environmental Science
The order of succession in a lithosere or xerosere is

Crustose lichen stage->Foilose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)
Moss stage ->Foilose lichen stage-> Crustose lichen stage ->herb stage->shrub stage->forest stage (climax community)
Crustose lichen stage->Foilose lichen stage->moss stage-> ->shrub stage-> herb stage->forest stage (climax community)
Foliose lichen stage->Crustose lichen stage->moss stage->herb stage>shrub stage->forest stage (climax community)

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