Nouns denoting natural objects (not man-made)

Bering Strait
a strait connecting the Bering Sea to the Arctic Ocean
 
rapid
a part of a river where the current is very fast
 
ridge
a long narrow natural elevation on the floor of the ocean
 
quasi-stellar radio source
a starlike object that may send out radio waves and other forms of energy; many have large red shifts
 
blanket
anything that covers
 
pebble
a small smooth rounded rock
 
Meuse River
a European river; flows into the North Sea
 
Trinity River
a river in eastern Texas that is formed near Dallas and flows generally southeastward to Galveston Bay
 
microfossil
a fossil that must be studied microscopically
 
quicksand
a pit filled with loose wet sand into which objects are sucked down
 
Oder River
a European river; flows into the Baltic Sea
 
Bay of Bengal
an arm of the Indian Ocean to the east of India
 
spark
a small fragment of a burning substance thrown out by burning material or by friction
 
antiparticle
a particle that has the same mass as another particle but has opposite values for its other properties; interaction of a particle and its antiparticle results in annihilation and the production of radiant energy
 
volcano
a mountain formed by volcanic material
 
sawpit
a pit over which lumber is positioned to be sawed by two men with a long two-handed saw
 
Ara
a constellation in the southern hemisphere near Telescopium and Norma
 
adjunct
something added to another thing but not an essential part of it
 
bed
(geology) a stratum of rock (especially sedimentary rock)
 
White Nile
a headstream of the Nile; joins the Blue Nile at Khartoum to form the Nile
 
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