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Ch12 Earth and Space

Definitions from Earth and Space Science BJU Press Ch 12

TermDefinition
thermoscope a temperature-measuring devices invented by Galileo that relied on temperature-related changes in a volume of air contained within a glass bulb
bimetallic thermometer temperature- measuring device consisting of 2 strips of metal having different rates of thermal expansion that are bonded together into a coil, such that changes in temperature cause the coil to curl or uncurl. The coil is attached to an indicating pointe
digital thermometer A thermometer that measures temperature electronically and displays the temperature in a digital format.
fiducial points Any of one or more fixed reference points that anchor a measurement scale to some easily determined physical quantity. In case of temperature scales, a common set of fiducial points is the freezing and boiling points of pure water at one atmosphere of pre
Fahrenheit scale A temperature scale having fiducial points(fixed reference) at the freezing point (32) and the boiling point (212) of pure water at one atmosphere of pressure.
Celsius scale A temperature scale having fiducial points (reference point) at the freezing point\ (0) and boiling point (100) of pure water at one atmosphere of pressure.
maximum thermometer highest temperature
minimum thermometer lowest temperature
Bourdon tube thermometer a thin-walled flattened tube of elastic metal bent into a circular arc whose application to certain pressure gauges and thermometers depends upon the fact that increase of pressure inside the tube tends to straighten it
thermograph recording thermometers
thermometer shelter structure that shelters a thermometer from direct sunlight and other conditions that would cause the thermometer to give erroneous readings of the free air temperature.
barometer measure atmospheric pressure
mercurial barometer a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmosphe
millibar mb
aneroid barometer aneroid barometer in British. noun. a device for measuring atmospheric pressure without the use of fluids. It consists of a partially evacuated metal chamber, the thin corrugated lid of which is displaced by variations in the external air pressure
barograph record atmospheric pressure on graph paper
psychrometer records relitive humidity
sling psychrometer a psychrometer that can be whirled in the air until the reading of the wet-bulb thermometer reaches a constant value
hygrometer measures humidity of air
anemometer measures wind speed
wind vane show direction wind is blowing
beaufort wind scale is an empirical measure that relates wind speed to observed conditions at sea or on land
rain gauge measures amount of rainfall
radiosonde what some weather balloons carry
pilot balloon used for knowing wind speed
theodolite a sighting instrument
rawinsonde a radiosonde tracked by a radio direction-finding device to determine the velocity of winds aloft.
radar a system for detecting the presence, direction, distance, and speed of aircraft, ships, and other objects, by sending out pulses of high-frequency electromagnetic waves that are reflected off the object back to the source
weather satellite is a type of satellite that is primarily used to monitor the weather and climate of the Earth.
station model station models are symbolic illustrations showing the weather occurring at a given reporting station
isotherm a line on a map connecting points having the same temperature at a given time or on average over a given period
isobar a line on a map connecting points having the same atmospheric pressure at a given time or on average over a given period
synoptic weather chart a weather chart
contour line connects points of equal hights on a map
NOAA Weather radio (NWR) on of the fastest weather braodcasts
Created by: kjkhp
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