See also: Dealing with Breathing Problems written for patients. The term hyperventilation describes excessive ventilation of the lungs, beyond what is required to achieve normal arterial blood gases.
A light frost occurs when the temperature drops to below 32 degrees Fahrenheit, and refers to the conditions that allow a layer of ice crystals to form when water vapor condenses and freezes without first becoming dew. Harvest basil and other tender herbs before a light frost (when the temperature drops to 32 degrees Fahrenheit). 2  Even if they survive the frost, they don't do well in cold temperatures. 3  The same is true for most annuals.
1 It is described as a light frost if the temperature is between 32 and 29 degrees Fahrenheit. 2  A moderate frost is the term used if the temperature is between 28 and 25 degrees Fahrenheit. 3  If the temperature goes below 25 degrees Fahrenheit, it is a killing frost and many of the plants will turn black.his is because air temperature affects many of the plantâs basic physiologic processes, such as the absorption of nutrients. 1  It is described as a light frost if the temperature is between 32 and 29 degrees Fahrenheit. 2  A moderate frost is the term used if the temperature is between 28 and 25 degrees Fahrenheit.