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 newspaper reported the wrong temperature
The thermometer was in error
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
The wind-chill factor:

Takes into account humidity and air temperature in expressing the current air temperature
Relates body heat loss with wind to an equivalent temperature with no wind
Tells farmers when to protect crops from a freeze
Determines how low the air temperature will be on any given day
Indicates the temperature at which water freezes on exposed skin

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