Video: The Sensory System: Definition, Parts & Functions. This lesson will examine how the sensory systems are integrated and how they function as a whole. Instead of telling you ears hear and eyes see, we will examine how these systems are actually very similar in terms of reception, signals, and translations.
Mercury is a silvery-white metal element that is liquid at ordinary room temperature; it has no taste or smell. It occurs as metallic mercury (Hg), as cinnabar (HgS) and in perhaps 25 other in organic mineral compounds. The elemental form (Hg) vaporizes at any temperature down to almost 40Â° below zero. The vapor also has no taste or smell. The specific gravity of mercury is 13.546; therefore, it is heavier than lead and, like lead and other heavy metals, it is a potent poison. Exposure to metallic mercury or mercury compounds, even in small quantities over a period of time, can cause severe poisoning.
From the night, Mercury's surface temperature changes 1,130 Â°F (630 Â°C), more than any other planet or moon in the solar system. Just before sunrise on a typical day on Mercury the temperature is -300 Â°F (-180 Â°C). By midmorning the temperature rises to 80 Â°F (27 Â°C).efore the sunrise the temperature on the surface of Mercury is as low as 100 K (-170 Â°C) and by noon the temperature on the surface of Mercury rises to about 700 K (400 Â°C).