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coast guard
(Encyclopedia)coast guard, special naval force assigned to seaboard duties. Its primary responsibilities usually consist in suppressing contraband trade and aiding vessels in distress. The British coast guard was e...geomorphology
(Encyclopedia)geomorphology, study of the origin and evolution of the earth's landforms, both on the continents and within the ocean basins. It is concerned with the internal geologic processes of the earth's crust...gas
(Encyclopedia)gas, in physics, one of the three commonly recognized states of matter, the other two being solid and liquid. A substance in the gaseous state has neither definite shape nor definite volume. Like liqu...Helsinki
(Encyclopedia)Helsinki hĕlˈsĭngkē [key], Swed. Helsingfors, city (2020 pop. 653,835), capital of Finlan...Denver
(Encyclopedia)Denver, city (2020 pop. 715,522), alt. 5,280 ft (1,609 m), state capital, coextensive with Denver co., N central Colo., on a plateau at the foot of the ...Dallas
(Encyclopedia)Dallas, city (2020 pop. 1,304,379), seat of Dallas co., N Tex., on the Trinity River near the junction of its three forks; inc. 1871. The third largest ...lake, body of water
(Encyclopedia)lake, inland body of standing water occupying a hollow in the earth's surface. The study of lakes and other freshwater basins is known as limnology. Lakes are of particular importance since they act a...low-temperature physics
(Encyclopedia)low-temperature physics, science concerned with the production and maintenance of temperatures much below normal, down to almost absolute zero, and with various phenomena that occur only at such tempe...Uranus , in astronomy
(Encyclopedia)Uranus yo͝orāˈnəs, yo͝orˈə– [key], in astronomy, 7th planet from the sun, at a mean distance of 1.78 billion mi (2.87 billion km), with an orbit lying between those of Saturn and Neptune; its...sunspots
(Encyclopedia)sunspots, dark, usually irregularly shaped spots on the sun's surface that are actually solar magnetic storms. The spots are darker because the temperature of the spots is lower than that of the surro...Browse by Subject
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