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15 Cards in this Set
- Front
- Back
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Speed up
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Accelerate
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Opposite matter
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Antimatter
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Smallest element
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Atom
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Test theory
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Experiment
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Push pull
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Force
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Educated guess
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Hypothesis
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Two elements
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Compound
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Negative particle
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Electron
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Proton neutron
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Nucleon
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Atom middle
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Nucleus
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Indivisible object
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Particle
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Gas Matter
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Plasma
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Positive particle
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Proton
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Building block
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Quark
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Object's speed
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Velocity
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