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.
Frost forms when water vapor in the air changes from the gas phase to the solid stage. Frost is difficult to predict, though, because the air temperature within the vicinity of your garden can be several degrees higher than 32 degrees Fahrenheit â the freeze point â and yet it can still form on your plants.