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Salt River Bay National Historical Park and Ecological Preserve

(Encyclopedia)Salt River Bay National Historical Park and Ecological Preserve: see National Parks and Monuments (table)national parks and monuments (table). ...

Cane River Creole National Historical Park and Heritage Area

(Encyclopedia)Cane River Creole National Historical Park and Heritage Area: see National Parks and Monuments (table)national parks and monuments (table). ...

Great Sand Dunes National Park and Preserve

(Encyclopedia)Great Sand Dunes National Park and Preserve, 132.4 sq mi (343 sq km), in the San Luis Valley of S Colorado; est. as a national monument 1932, designated a national park 2004. Lying in an area of high ...

Wrangell–Saint Elias National Park and Preserve

(Encyclopedia)Wrangell–Saint Elias National Park and Preserve, at the convergence of the Chugach, Wrangell, and St. Elias mts., SW Alaska. The park (8,323,618 acres/3,369,856 hectares) contains Mt. Saint Elias (1...

International System of Units

(Encyclopedia)International System of Units, officially called the Système International d'Unités, or SI, system of units adopted by the 11th General Conference on Weights and Measures (1960). It is based on the ...

Nobel Prizes (table)

(Encyclopedia)Nobel Prizes

Geologic Timescale (table)

(Encyclopedia)Geologic Timescale 1 Not an era but the time preceding the Cambrian. ...

Trigonometric Functions (table)

(Encyclopedia)Trigonometric Functions

Radio Frequencies (table)

(Encyclopedia)Radio Frequencies

atomic number

(Encyclopedia)atomic number, often represented by the symbol Z, the number of protons in the nucleus of an atom, as well as the number of electrons in the neutral atom. Atoms with the same atomic number make up a c...