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Landforms erosion
Test 1
32
Science
5th Grade
10/15/2011

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Term
Crust
Definition
Earths rocky outer layer -mostly solid rock
Term
Weathering
Definition
Destructive force that breaks down rocks into smaller pieces two types mechanical and chemical
Term
Sediment
Definition
Small pieces of rock that are broke off through mechanical weathering
Term
Erosion
Definition
Destructive force in which pieces of rock are moved by water, wind, or moving ice, gravity
Term
Deposition
Definition
Constrctive force in which sediments that have been moved from one place are dropped or released in another place, or change of state from gas to solid.
Term
Contour lines
Definition
Lines on a topographical map that indicate areas with the same elevation or height above sea level
Term
Topographic map
Definition
Map that shows the shape of surface features and their elevations above sea level
Term
Plateau
Definition
High landforms with flat surfaces
Term
Continental margin
Definition
Content shelf-forms edges of continent gradually slopes down from sea level, slope-steeper, it falls many miles,forming side of content,, rise-atbbottom of slope, the ocean floor
Term
Causes of mechanical weathering
Definition
Ice-as water freezes lit expands breaking rocks apart, moving air and water weakens rocks, plant roots grow through cracks, burrowing animals, peeling of outer layers as rocks are exposed.
Term
Forces that move sediment
Definition
Water, wind
Term
River flood
Definition
Term
Seamounts
Definition
Huge steep sided mountains on the ocean floor. Deep ocean floor abyssal plain
Term
Ocean basin
Definition
Region beyond continental margin. Deep canyons called trenches. Mid ocean ridges. Under wate mountains.
Term
Abyssal plain
Definition
Ocean Floor
Term
Chemical weathering
Definition
Water dissolves minerals that make up rock, and affect soil and air making acid rain, dissolving rocks
Term
Cave formation
Definition
Weak acids in rain seep into crust weathering rock slowly creates caves
Term
Caves
Definition
Underground hollow areas created by weathering
Term
Meanders
Definition
When a river goes across flat areas it winds in smooth curves deposition occurs they increase in size when water erodesnthe outside ofnthe curve and deposits sediments on the inside of the curve
Term
Delta
Definition
A low plain that forms where a river enters the ocean
Term
Magma
Definition
Melted rock below earth's surface
Term
How were Himalayas formed
Definition
Plate tectonics
Term
How do glaciers create mountains
Definition
Glaciers round and carve out mountains
Term
Till
Definition
Silt sand gravel sharp rocks carried by glaciers
Term
Shield cone
Definition
When enough lava. Builds up to form huge deposit with gently sloping sides
Term
How are coral reefs formed?
Definition
Formation formed by coral in colonies. Die to produce ridges. Sometimes form around island that sinks but ridge still grows forming barrier reef
Term
How did glaciers form thousands of years ago?
Definition
Huge mat. Of snow packed to form ice. Weight of ice so great that it pushed and dented land moving the ice form very slowly
Term
What makes up earths surface?
Definition
Water and landforms-ocean, plateaus, valleys, mountains, hills, beaches
Term
Headlands
Definition
Narrow sections of land that jut out into the ocean
Term
Mountain valleys
Definition
Long, narrow regions of low land between mountains or hills
Term
Atlantic coastal plain
Definition
Canada to fla
Term
Ocean basin
Definition
Region beyond continental margin
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