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28 Cards in this Set
- Front
- Back
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Atoms
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Submicroscopic particles that constitute the fundamental building blocks of ordinary matter.
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Molecules
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Two or more atoms joined in a specific geometrical arrangement.
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Chemistry
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The science that seeks to understand the behavior of matter by studying the behavior of atoms and molecules.
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Hypothesis
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A tentative interpretation or explanation of the observations.
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Experiments
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Highly controlled procedures designed to generate observations.
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Scientific Law
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A brief statement that summarizes past observations and predicts future ones.
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Law of Conservation of Mass
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In a chemical reaction, matter is neither created nor destroyed.
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Theory
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A model for the way nature is and tries to explain not merely what nature does but why.
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Atomic Theory
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Matter is composed of small, indestructible particles called atoms. Total amount of mass remains same.
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Matter
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Anything that occupies space and has mass.
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Substance
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A specific instance of matter.
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State
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Physical form.
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Composition
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Basic components that make up matter.
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Pure Substance
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Substance made up of only one component and its composition is invariant.
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Mixture
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Substance composed of two or more components in proportions that can vary from one sample to another.
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Element
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A substance that cannot be chemically broken down into simpler substances.
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Compound
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A substance composed of two or more elements in fixed, definite proportions.
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Heterogeneous Mixture
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A mixture in which the composition varies from one region to another.
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Homogeneous Mixture
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A mixture with the same composition throughout.
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Physical Changes
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Changes that alter only state or appearance, but not composition.
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Chemical Changes
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Changes that alter the composition of matter.
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Physical Property
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A property that a substance displays without changing its composition.
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Chemical Property
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A property that a substance displays only by changing its composition via a chemical change.
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Energy
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The capacity to do work.
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Work
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The action of a force through a distance.
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Kinetic Energy
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Energy associated with its motion.
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Potential Energy
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The energy associated with its position or composition.
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Law of Conservation of Energy
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Energy is neither created nor destroyed.
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