Exam 1 Flashcards
(40 cards)
What is Geology?
The study of the earth.
Scientific Process
Ask a question Collect data Formulate a hypothesis Make predictions Collect more data Evaluate Hypothesis Accept, Reject, Revise
What is a mineral?
A naturally occurring, inorganic substance with and orderly internal arrangement of atoms, and a chemical composition that varies within given limits.
What are the physical properties
Color Luster Streak Color Hardness Breakage Crystal Growth Forms Effervescence Magnetism Density Other Stuff
Categories of Color
Diagnostic
Variable
Categories of Luster
Metallic
Glassy/Vitreous
Waxy
Earthy
Who Created the Hardness Scale
Mohs hardness scale
1-10 ranking
Categories of Breakage
Cleavage
Fracture
What is Effervesence
Hydrochloric Acid that causes bubbles
What are Striations
Parallel lines on Cleavage face of mineral
What are color bands
Darker vs lighter bands running through the mineral
Characteristics of Pyrite
metallic, black streak, golden color
Characteristics of Galena
heavy, cubic cleavage, metallic, blue/gray color
Characteristics of Fluorite
Rhombic Cleavage, glassy, white streak, harder than penny
Characteristics of Magnetite
Magnetic, black streak, heavy
Characteristics of Hematite
reddish brown color/streak, weakly magnetic, earthy luster
Characteristics of Sphalerite
yellow streak, sulfurous
Characteristics of Halite
softer than penny, glassy, cubic cleavage
Characteristics of Calcite
rhombic cleavage, glassy, bubbles under hydrochloric acid
Characteristics of Gypsum
platy, softer than fingernail, clear to dark gray in color
Characteristics of Dolomite
weak bubbles, glassy crystals on rock, pink or orange in color
Characteristics of Limonite
Stronger than steel nail, orange/yellow-brown, earthy, rusty
Characteristics of Quartz
fracture, glassy, stronger than streak plate, varies in color-clear, pink, white, gray
Characteristics of Graphite
metallic, soapy, softer than fingernail
