Review
Suppose yesterday morning you noticed ice crystals (frost) on the grass, yet the minimum temperature reported in the newspaper was only 35 degrees F. What is the most likely reason for this apparent discrepency?
The thermometer used by the National Weather Service is more than 5 ft. above ground.
Newspapers approximate temperature minimums.
The thermometer was read before the minimum temperature was reached.
Grass blades are good radiators of shortwave radiation.
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