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earthspacescience
lightning
unstable air | what are the two conditions required to form a thunderstorm |
lightning | what is a short-lived bright flash of light produced by an abrupt discharge of electricity through the air |
return stroke | what phase of a lightning bolt is seen as a brilliant flash of light |
cumulus stage | the stage in the life of a thunderstorm |
thunder | a lightning bolt that expands explosively forming a shock wave of sound |
thermometer | used to to measure temperature |
barometer | used to measure atmospheric pressure |
aneroid barometer | uses a flexible, airtight metal box to measure changes in pressure |
hygrometer | used to measure relative humidity |
weather vane | a simple device that points into the wind |
rain gauge | an open, cylinderacal glass jar with a ruler on the side |
ceilometer | measures the distance from the ground to the base of the clouds |
supercell | what term refers to a thunderstorm with a single, giant, rotating updraft |