Blimp. The Goodyear blimp under constant security and never left alone.
Tone Arm. A phono cartridge is an electro-mechanical device mounted at the front of a tonearm on a turntable.
273.15. The Kelvin scale is named for William Thomson, 1st Baron Kelvin, a physicist in Northern Ireland.
Blue. Less pigment in the iris makes the eye more sensitive to light.
Weighted Ropes. Using weighted ropes to profile the ocean floor is called "sounding".
Carbon Dioxide. Carbon dioxide is emitted naturally through the carbon cycle.
Typhoon. Typhoons in the eastern portion of the North Pacific are called "hurricanes".
Lunar Eclipse. A lunar eclipse can occur only when the Sun, Earth, and Moon are very closely with the Earth in the middle.
Milligram. The United States has not yet adopted the metric system.
Echolocation. Echolation, similar to radar, bounces sound waves off objects in order to locate them.
Tryptophan. Tryptophan induces production of serotonin.
Physicist. Albert Einstein is probably the world's best known physicist.
Vesuvius. Vesuvius, of Italy, is the only active mainland volcano.
Igneous Rock. The three main types of rock are igneous, sedimentary and metamorphic.
Dead Skin. About 40,000 dead skin cells are lost every minute of each day.
Lodestone. A lodestone is a naturally magnetized piece of the mineral magnetite.
Zepto-. Zepto denotes a factor of 10 to the -21st power.
Aeronautics. In 1971, NASA was the fourth site connected to ARPAnet.
Diamond. One of largest diamonds in the world came from the Kimberly Mines of South Africa.
1013.25 mb. Changes in air pressure indicate a change in the weather.