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37 Cards in this Set
- Front
- Back
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Occurs if the substance remains after a change in its condition.
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Physical Change
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Occurs if a new substance appears after a change in its condition.
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Chemical Change
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A change in state.
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Physical Change
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Energy, color change, precipitate, gas production.
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4 Evidences of a Chemical Change
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Energy is absorbed in a reaction.
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Endothermic Reaction
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Occurs if the substance remains after a change in its condition.
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Physical Change
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Energy is released in the reaction.
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Exothermic Reaction
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Occurs if a new substance appears after a change in its condition.
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Chemical Change
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A way of thinking.
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Scientific Method
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reasonable and testable explanation for observations.
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Hypothesis
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A change in state.
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Physical Change
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Needed to test the validity of a hypothesis.
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Experiments
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Energy, color change, precipitate, gas production.
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4 Evidences of a Chemical Change
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Energy is absorbed in a reaction.
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Endothermic Reaction
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A factor that could affect the results of an experiment. It could have several variables, must teach each one.
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Variable
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Energy is released in the reaction.
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Exothermic Reaction
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A way of thinking.
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Scientific Method
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reasonable and testable explanation for observations.
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Hypothesis
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Needed to test the validity of a hypothesis.
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Experiments
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A factor that could affect the results of an experiment. It could have several variables, must teach each one.
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Variable
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A variable thats kept constant
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control
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An explanation for some phenomenon that's based on observations, experiments, and reasons. Its well tested and has explanations.
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theory
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A statement or mathematical expression that reliably describes a behavior of the natural world. Law of conservation of energy, law of conservation of mass, and a theory explains it, a law describes it.
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law
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Represents an object, process, or an idea. They are simplified.
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model
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A description of how close a measurement is to the true value of the quantity measured.
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accuracy
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How close a set of measurements or a quantity are to one another.
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precision
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Mass divided by volume
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Density
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the heat needed to raise the temperature of one gram of a substance.
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Specific Heat Capacity
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Used with very large or very small numbers.
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Scienticif Notation
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In an insulated system, any heat lost by one quantity of matter must be gained by another.
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Law of Conservation of Energy
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Mass can't be created or destroyed.
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Law of conservation of mass
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Set of logical explanations.
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Scientific Method
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the energy of an object thats due to the object's motion.
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kinetic energy
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The energy transferred between objects that are at different temperatures.
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heat
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a measurement of the average kinetic energy of the random motion of particles in a substance.
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Temperature
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the quantity of heat required to raise a unit mass of homogenous material 1 Kelvin or 1 degree celcius in a specific way given constant pressure and volume.
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Specific Heat
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The change of a substance from a liquid to a gas.
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Evaporation
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