definition of a mineral correct answers naturally occurring
inorganic solid
ordered internal molecular structure
definite chemical composition
definition of a rock correct answers a solid aggregate or mass of minerals
Anion correct answers A negatively charged ion
Cation correct answers...
EASC 101 MIDTERM || ALREADY GRADED A+.
definition of a mineral correct answers naturally occurring
inorganic solid
ordered internal molecular structure
definite chemical composition
definition of a rock correct answers a solid aggregate or mass of minerals
Anion correct answers A negatively charged ion
Cation correct answers A positively charged ion
ionic bond correct answers Formed when one or more electrons are transferred from one atom to
another
strong
covalent bond correct answers A chemical bond that involves sharing a pair of electrons between
atoms in a molecule
stronger than covalent
metallic bonding correct answers the chemical bonding that results from the attraction between
metal atoms and the surrounding sea of electrons
not as strong as ionic or covalent
mass number correct answers the sum of the number of neutrons and protons in an atomic
nucleus
Isotopes correct answers Atoms of the same element that have different numbers of neutrons
Why does radioactive decay occur? correct answers the nucleus is unstable due to a ratio of
protons to neutrons, trying to make itself stable
Polymorphs correct answers Minerals with the same composition but different crystalline
structures
crystal form correct answers the external appearance of a mineral as determined by its internal
arrangement of atoms
this happens if there is enough space for crystal to grow freely
How to identify minerals (6 ways) correct answers 1.Hardness (mohls scale)
2.Cleavage/fracture
3.Lustre
4.Color
5.Streak
6.Other properties (e.g. Magnetism, taste)
, Mineral Formation correct answers crystallization from magma, crystal growth in the solid state,
precipitation from solution
biological activity
Silicates correct answers minerals that contain silicon and oxygen and usually one or more other
elements
most abundant
Pyrozene correct answers silicate minerals, usually black or dark green, that occur in both
igneous and metamorphic rocks
90 degree cleavage
Horneblende (Amphibole) correct answers double chain
cleavage at 120 degree
Feldspar correct answers 90 degree cleavage
some rich in K,others in Na and Cl
mica group correct answers muscovite and biotite
sheet structures
can peel apart in layers
Calcite correct answers dolomite and calcite most common
may be a mix of Mg is present for dolomite
Hematite correct answers rust, used as cement in sedimentary rocks, can be mined for irone ore
native elements correct answers substances that exist naturally in the earth's crust as single,
uncombined elements
Rock types correct answers igneous, sedimentary, metamorphic
rock cycle correct answers diagram that shows the slow, continuous process of rocks changing
from one type to another
does not always go one way
How do igneous rocks form? correct answers It forms from cooling and crystallizing of magma
or lava
magma consists of: correct answers liquid portion
solids
volatiles
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