Geo 8 CH 3 VOCABS
Liquid-in-glass Thermometer
A device for measuring temperature that consist of a tube with a liquid-filled bulb at the one end. The expansion or contraction of the liquid indicates temperature.
Isotherm
A line connecting points of equal air temperature
Heat Stress Index
A measure of apparent temperature that used temperature & humidity to establish the degree of comfort or discomfort.
Wind Chill Temperature
A measure of apparent temperature that uses the effect of wine and temperature on the cooling rate of human body.
Growing Degree Days
A practical application of temperature data for determining the approximate date
Kelvin (Absolute) Scale
A temperature scale used primarily for scientific purposes and having intervals equivalent to those on the Celsius scale, but beginning with absolute zero .
Bimetal Strip
A thermometer consisting 2 thin strips of metal welded together, which have widely different coefficients of thermal expansion. When temperature changes, the two element. Commonly used in thermographs.
Maximum Thermometer
A thermometer that measures the maximum temperature for a given period, usually 24 hrs.
Minimum Thermometer
A thermometer that measures the minimum temperature for a given period, usually 24 hours.
Thermistor
An electric thermometer consisting of a conductor whose resistance to the flow of current is temperature dependent
Thermometer
An instrument for measuring temperature
Thermograph
An instrument that continuously records temperature
Temperature Controls
Any factor that causes temperature to change from place to place and from time to time.
Annual Mean Temperature
Average of 12 monthly means.
Heating Degree Days
Each degree of temperature of the daily mean below 65F is counted as one heating degree-day. The amount of heat required to maintain a certain temperature in a building is proportional to the heating degree-day total.
Cooling Degree Days
Each degree of temperature of the daily mean that is above 65F is counted as 1 cooling degree-day. The amount of energy required to maintain a certain temperature in a building is proportional to the cooling degree-dat total.
Fixed points
Reference points, such as the steam point and ice points, used in the construction of temperature scales.
Apparent Temperature
The air temperature perceived by a person
Specific Heat
The amount of heat needed to raise 1 gm of substance 1 Celsius.
Temperature Gradient
The amount of temperature change per unit distance
Monthly Mean Temperature
The average of all the daily means in a calendar month
Daily Temperature Range
The difference between the maximum and minimum temperature in a day
Monthly Temperature Range
The difference between the warmest and coldest mean temperature in a calendar month.
Annual Temperature Range
The difference between the warmest and coldest monthly means.
Daily Mean Temperature
The mean temperature for a day that is determined by average the hourly temperature or, more commonly, by average the maximum & minimum temperatures for a day.
Steam Point
The temperature at which water boils or condenses
Ice point
The temperature at which water freezes or ice melts.
Celsius Scale
The temperature scale developed by Anders Celsius in 1742 and used where the metric system is in use. Also called "centigrade"
Fahrenheit Scale
The temperature scale developed by Gabriel Fahrenheit in 1714 & used in the English system.
Absolute Zero
The zero point on the Kelvin temperature scale, representing the temperature at which all molecular motion is presumed to cease.
