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

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Environmental Science
The primary cause of a radiation inversion is:

Solar radiation absorbed by the earth's surface
Infrared radiation absorbed by the atmosphere and clouds
Infrared radiation absorbed by the earth's surface
Infrared radiation emitted by the earth's surface
Solar radiation reflected by the earth's surface

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