1.
Abyssal plains: The flattest parts of oceans (ocean plains)
2.
Alpine glacier: The type of glacier which develops in mountainous areas
3.
Anticline: An arch-shaped fold
4.
Aquifer: A zone of water-bearing rock through which groundwater can flow
5.
Atlantic Ocean: The coldest and saltiest ocean
6.
Caldera: A crater larger than 1 kilometer
7.
Cinder cone volcano: The type of volcano which is very steep but rarely rises above 900 feet
8.
Composite cone volcano: The type of volcano which is produced by alternating layers of lava, ash, and mud
9.
Continental glacier: The type of glacier which covers broader areas and can be very thick
10.
Continental margin: The transition zone between dry land and ocean bottom
11.
Continental shelf: The shallowest part and closest part to continents of the ocean bottom
12.
Continental slope: The sloping outer edge of the continents
13.
Crater: A bowl-shaped depression at the summit of a mountain
14.
Dead Sea: The lowest point on earth
15.
Fault: A fracture where the rocks on either side have moved relative to each other
16.
Fault block mountains: The type of mountains which are created by compression and wrinkling of rock
17.
Fold: A bend in layered rock
18.
Folded mountains: The type of mountains which feature a great amount of complex folding
19.
Fracture: A crack in a rock
20.
Glacier: A dense, icy, slow-moving river of ice that forms from unmelted snow that has accumulated for thousands of years and
21.
Indian Ocean: The smallest ocean
22.
Land subsidence: The lowering of the land-surface elevation due to over-pumping of aquifers
23.
Mariana Trench: The lowest point in oceans
24.
Mount Everest: The highest point on earth
25.
Mountain: A thick section of crust that is elevated with respect to the surrounding crust
26.
Ocean trenches: The deepest parts of oceans
27.
Ocean water: A complex solution of mineral salts, dissolved gases, and decomposed biological material
28.
Pacific Ocean: The largest and deepest ocean
29.
Plain: Flat area in continents
30.
Plateau: A plain at higher elevation
31.
Recharging: The process of restoring lost groundwater
32.
Ring of Fire: A string of volcanoes that encircle the Pacific Ocean
33.
Runoff: Water that moves over the surface of earth
34.
Salinity: The proportion of dissolved salts to pure water
35.
Shield volcano: The type of volcano which is built up from a steady supply of fluid basaltic lava
36.
Stream: Any body of flowing water (less than 99 miles long)
37.
Syncline: A trough-shaped fold
38.
Upward mountains: The type of mountains which have a domelike shape
39.
Volcanic mountains: The type of mountains which produce a conical shape
40.
Volcano: A mountain formed by extrusion of lava, ash, and rock
41.
Water table: The upper boundary of the saturated zone
42.
Watershed: An area of land that drains into a stream
43.
Well: A structure that pumps groundwater to the surface