Shared Flashcard Set

Details

Geology cards
8th grade science
36
Science
8th Grade
03/30/2011

Additional Science Flashcards

 


 

Cards

Term
Geology
Definition
the study of Earth's surface and interior
Term
Geologist
Definition
a person who specializes in the scientific study of the orgin, history and structure of the earth
Term
Atmosphere
Definition
Gaseous envelope surrounding the earth, the air
Term
Ozone
Definition
In the atmosphere- absorbs ultraviolet rays preventing the rays from reaching earth
Term
Greenhouse  Effect
Definition
The ablity of the Earth's atmosphere to sbsorb long heat waves from Earth after allowing the suns short waves to pass through it
Term
Chloroflurocarbons
Definition
Gases containing chlorine fluorine and carbon atoms that break down the ozon layer and weaken protection from ultraviolet  waves
Term
Lithosphere
Definition
the outer solid shell of Earth that extends to a depth of about 100 kilometers
Term
Mantle
Definition
The layer of rock in earth extending from the crust downward 2850 kilometers
Term
Inner Core
Definition
Spherical center of earth about 2800km in diameter and made of solid iron = nickel
Term
Outer Core
Definition
Zone of Earths interior extending about 2100 b/w the Earths inner core + mantle +made of liquid iron +nickel
Term
Crust
Definition
Outer Layer of earth  that covers the earths mantle
Term
Hydrosphere
Definition
all the waters of earth, including both surface and subsurface water
Term
Erosion
Definition
process by which earth materials are moved by natural agents like moving water, wind, and ice
Term
Rock
Definition
A group of minerals bound together
Term
Mineral
Definition
Naturally occurring inorganic solid substance with a definite chemical composition and structure
Term
Element
Definition
a substance that cannot be broken down into simpler substances by ordinary chemical or Physical  means
Term
Color
Definition
A property of rocks that helps to determine it's identity
Term
Hardness
Definition
the resistance of a mineral to scratching
Term
Mohs' Scale of Hardness
Definition
Characterizes the scratch resistance of various minerals
Term
Streak
Definition
the color of a mineral when a powdered or rubbed on by a streak plate
Term
Luster
Definition
the way a mineral reflects light
Term
Cleavage
Definition
the tendency of a mineral to split easily  along planes  parallel to the crystal faces leaving smooth  flat surfaces in one or more directions
Term
Fracture
Definition
Appearance of a mineral surface where it breaks along other than cleavage planes
Term
Crystal
Definition
Solid substance  in which the atoms or ions are arranged in an orderly pattern that repeats over and over again
Term
Igneous Rock
Definition
Rocks formed by the solidification of hot molten rock material called magma
Term
Magma
Definition
Hot liquid rock beneath Earths surface
Term
Lava
Definition
Molten rock that reaches Earths surface
Term
Texture
Definition
Characteristic structure of a rock given by it's size shape and arragement of it's mineral crystals
Term
Sedimentary Rock
Definition
Rocks formed from sediments bound together in some way
Term
Cementation
Definition
Act or process of uniting minerals rocks and organic material to form larger rocks
Term
Compression/Compaction
Definition
To hold down
Term
Fossils
Definition
the remains impressions or other evidence of the former existence of life preserved in rock
Term
Metamorphic Rock
Definition
Rocks formed by the effect of heat press and chemical action on other rocks
Term
Banding
Definition
strip of concrasting color or material
Term
Rock Cycle
Definition
Sedimantary , medamorphic and igneous rock
Term
Plate Tectonics
Definition
Theory of the formation and movement of the rigid pieces, or plates that cover earths surface
Supporting users have an ad free experience!