Science.txt

a layer of soil differing from the layers above and below it.

horizon
leftover decomposed plant and animal matter

humus
the top layer of soil, rich in humus and minerals

topsoil
a hard layer of clay and minerals that lies beneath topsoil

subsoil
It is a large mass of snow and ice that moves over land

glacier
the end, or outer margin of a glacier

terminus
a rock debris carried and deposited by a glacier

moraine
an unsorted mixture of rock materials deposited as a glacier melts

glacial till
It is an isolated boulder left behind by a glacier

erratic
gravel, sand, and clay carried from glaciers by melting water and streams

outwash plain
a vertical section of soil from the surface down to bedrock

soil profile
the space between soil particles

pore space
the rate at which water can pass through a material

permeability
a movement or vibration in Earth

earthquake
a break in Earth's outer layer caused by the movement of rocks

fault
the solid rock that makes up Earth's outermost layer

crust
a liquid layer of Earth lying below the mantle

outer core
a vibration caused by rocks moving and breaking along faults

Seismic Wave
the layer of rock lying below the crust

mantle
a sphere of solid material at Earth's center

inner core

Author

hollowpond

62747

Card Set

Science.txt

Description

Geology terms (4th grade)

Updated

2011-01-29T16:45:50Z