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39 Cards in this Set

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  • Back
what is the metric unit for lenth?
meters
what is the metric unit for mass?
grams
what is the metric unit for tempurature?
kelvin
what is the metric unit for volume?
millimeters
how many cemtimeters are there in a meter?
100
how many meters are there in a kilometer?
1000
what is matter?
anything with mass
solid
fixed volume/area and fixed shape
liquid
no fixed shape but it has a fixed volume.
gas
no fixed volume/area and no fixed shape
plasma
gas becomes plasma when gas molecules lose electrons
what are some things that are plasma?
stars, neon lights and the ionospere.
ion
striped of electrons
electrons
negative charge, no mass
nuetrons
no charge
isotope
same element with the same number of protons but different number of neutrons
atomic number
number of protons/electons
atomic mass
number of protons+neutrons ( the bigger number)
it is an isotope when...
the exponent is a bigger number than the mass.
what is the Big Bang?
when all matter was condenced into one point and then the matter got too dense and exploded
what is cosmology
study of nature and evolution of the universe
when did the big bang occur?
15-20 billion years ago
what is the law of conservation of mass?
all matter is neither created of destroyed in a reaction
what is the open universe theory
the universe will continue to expand unitll all energy is lost to nothing
chemiluminecence
when light is created by combining two or more chemicals
bioluminecence
light created by two or more living organisms
oxidation reaction
oxygen relaces an atom and changes the energy level causing light
what is the order of electrons
2,8,8,18,18,18
galaxy
collection of stars, planets, gas dust ect.
milky way is what kind of galaxy?
spiral
how far apart is our galaxy?
100,000 light years across
what happens to the mass when two chemicals are combined?
the mass changes
what are ractants?
the original substances in a reaction or equation
what are products?
the fianl outcome of the combination of the reactants
single replacements
A+BC=AB+C
double replacments
AB+CD=AD+BC
Coeffiecient
the number before the chemical
Atoms
only one element
Molecule
more than one element combined