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This quiz tests your knowledge of various forms of measurement.
#1 Per the Enhanced Fujita Scale for rating tornado intensity, what is the minimum wind speed (miles per hour) required for a tornado to be classified EF5?
#2 As defined by SI (International System of Units), what element is used to define the length of a second of time?
#3 At what temperature do the Celsius and Fahrenheit scales have the same numerical value?
#4 Per the Morgan-Keenan stellar classification system, what is the hottest class of stars?
#5 What is the SI (International System of Units) unit of measurement for quantifying air pressure?
#6 Per the Saffir-Simpson Hurricane Wind Scale, at what sustained wind speed (miles per hour) does a tropical storm become classified as a hurricane?
#7 How many levels does the Modified Mercalli Intensity Scale for measuring earthquakes have?
#8 Compared to the common (Avoirdupois) ounce, what is the weight of a Troy ounce?
#9 How many times brighter is a star of magnitude 1 compared to a star of magnitude 2?
#10 What grain is used as the basis for determining shoe sizes?
#11 An acidic solution will turn red litmus paper blue.
#12 In the Mohs scale of mineral hardness, each hardness level is twice as hard as the previous hardness level.
#13 The volt is the electrical unit of measurement for defining electromotive force.
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