(Encyclopedia) thermometer, instrument for measuring temperature. Galileo and Sanctorius devised thermometers consisting essentially of a bulb with a tubular projection, the open end of which was…
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(Encyclopedia)
Common Weights and Measures
Length
Metric System
1 millimeter = 1/1,000 meter
1 centimeter = 1/100 meter
1 decimeter = 1/10 meter
1 meter (basic unit of length)
1 dekameter…
Understanding and Using the Scientific MethodScience Fair ProjectsUnderstanding and Using the Scientific Method The scientific method is the backbone of every science experiment, and understanding…
(Encyclopedia) gram, abbr. g, unit of mass equal to 0.001 kilogram, the basic unit of mass in the metric system. The gram is the unit of mass in the cgs system. It is approximately equal to 0.035…
Prehistoric Eggs The earliest fossil animal embryos, dating from the Precambrian era, were found by American, Taiwanese, and Chinese scientists in phosphate deposits in China's Guizhou province.…
(Encyclopedia) blue whale, a baleen whale, Balaenoptera musculus. Also called the sulphur-bottom whale and Sibbald's rorqual, it is the largest animal that has ever lived. Blue whales have been known…
(Encyclopedia) quadrant, in technology, angle-measuring device based on a scale of 90°. It is sometimes confused with the sextant, a similar instrument based on a scale of 60°. The quadrant is rarely…
(Encyclopedia) meter, abbr. m, fundamental unit of length in the metric system. The meter was originally defined as 1/10,000,000 of the distance between the equator and either pole; however, the…
(Encyclopedia) rocketsonde, rocket with instrumentation capable of measuring and transmitting meteorological data to altitudes of 250,000 ft (76,200 m). See radiosonde.
