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