Generator. A generator converts mechanical energy to electrical energy.
2.5 Miles. A calorie is the unit of energy it takes to raise the temperature of a gram of water by one degree Celsius.
Pound. In the system of British weights and measures. a pound is 16 ounces or 7000 grains.
Insulator. An insulator is any substance that blocks or retards the flow of electrical or thermal currents.
Rocks On Land. Water and acids erode rocks, which contain sodium, which eventually washes to the seas.
Landscaping. Landscaping is activity that modifies the visible features of an area, including flora and fauna.
Sundial. The simplest shadow clock is simply a vertical stick.
Sprouting. "Sprouting" is the germination of the plant's seed.
Triceratops. The Triceratops was preyed upon by the Tyrannosaurus.
Oxygen. Oxygen is first on land, second in air, and second in water.
Time. Time is shown in equations as "t".
Charleston, SC. A resident of Charleston, SC, Lining kept precise weather records.
Continental Drift Theory. The continental drift theory poses that there was one super continent called Pangaea.
Ice. Ice is the most abundant of the varying solid phases on the Earth's surface.
Gold. Gold provides the standard for most monetary policies.
Rotorcraft. A rotorcraft uses lift created by rotor blades.
Russia. The finback pelycosaurs was the dominant animal during the early Permian age.
A Tree. Kapok is used as filling for lifejackets, mattresses and pillows.
60 Sec. A healthy human heart beats 115,200 times in a 24-hour period.
46. "Trisome" or "trisomy" is the condition of having an extra chromosome on one of the 23 pairs.