Exam 1 Flashcards
(29 cards)
what is the study of earth called
geology
a ___is a result of testing hypothesis
conclusion
what element is most abundant in earths crust by weight
oxygen
a mineral can be defined as
occurring only in nature
the resistance of a mineral to abrasion is called
hardness
what are the three native elements
gold, copper, silver
if a mineral is clear, relatively colorless, does not react with acid, does not scratch glass…
halite
what are three main types of rocks
metamorphic, sedimentary, igneus
if a rock exhibits large crystals in composition, we can infer
formed underground and cooled slowly
what is the least best method to help identify
color
extrusive rocks are
form with eruption, contain organic matter, rarely contain crystals
3 ways sedimentary rocks are classified
by particle size, composition, organic material
good example of geological hotspot
yellowstone, hawaii, greenland
oceanic crust in made of what extrusive rock
basalt
metamorphic rock formed between what temps
900, 200
rocks are composed of 2 or more minerals
true
most fossils found in sedimentary rocks
true
there is no difference between lava and magma
false
a mineral that shows a red streak does not contain iron
false
which mineral gives granite a peach like color and can be found in crystalline form in perforated rocks
potassium feldspar
dark silicates or mafic rocks usually have
iron, magnesium, augite, olivine
which mineral is likely to react with HCL acid
calcite
what common mineral composed of oxygen and silicon almost completely
quartz
the hardest mineral found in nature
diamond
