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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 fundimental building blocks of ordinary matter.
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MOLECULES
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Two or more atoms joined in a specific geometricle 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. Hypotheses are tested by experiments.
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SCIENTIFIC LAW
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A brief statement that summerizes past observations and predicts future ones.
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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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HYPOTHESES
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A tentative interpretation or explanation of the observations.
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EXPERIMENTS
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Hypotheses are tested by experiments, highly controlled procedures designed to generate such observations.
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SCIENTIFIC LAW
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A brief statement that summarizes past observation 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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SCIENTIFIC THEORY
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Is 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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Proposed by John Dalton 1766-1844. Matter is composed of small indestructible particles called atoms.
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SCIENTIFIC METHOD
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Each new set of observations allows refinement of the original model.
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MATTER
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Is anything that occupies space and has mass.
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SOLID MATTER
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Atoms or molecules are packed together.
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SOLID MATTER CAN BE IN TWO FORMS
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Crystalline which are arranged in patterns.
Amorphous in which case its atoms or molecules do not have any long range order. |
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LIQUID MATTER
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Atoms or molecules are packed like that of solid matter except they have nore room to move around.
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GASEOUS MATTER
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Atoms or molecules have alot of space between them and are free to move relative to one another.
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PURE SUBSTANCE
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One composed of one type of atom or molecule.
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MIXTURE
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A substance made up of two or more different atoms or molecules.
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ELEMENT
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A substance that cannot chemically be broken down to further simpler substances.
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COMPOUND
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A substance composed of two or more elements.
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HETEROGENEOUS MIXTURE
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One in which the composition differes from one region to another.
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HOMOGENEOUS MIXTURE
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One in which the composition is the same throughout.
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PHYSICAL CHANGES
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Changes that alter state or appearance but not the composition.
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CHEMICAL CHANGES
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Changes that alter the composition of a substance.
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PHYSICAL PROPERTY
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Is one that a substance displays without change in composition.
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CHEMICAL PROPERTY
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Is one that a substance displays only by changing its composition through a chemical reaction.
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