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