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18 Cards in this Set
- Front
- Back
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What are the steps of the Scientific Method?
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Ask a question, make an observation, form a hypothesis, perform your experiment, analyze your results, draw conclusions, and communicate the results
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Define: Physical Properties
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Properties of matter that can be observed without changing the identity of the matter.
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What are some examples of Physical Properties?
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Color, size, odor, mass, volume, shape, conductivity, malleability, ductility, and solubility
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Define: Solubility
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The ability of a substance to dissolve in a solvent (usually water)
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Define: Conductivity
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The transmission of heat or electricity through a substance
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Define: Malleability
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The ability to change the shape of an object by hammering it
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Define: Ductility
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The ability to pull a substance into long thin strands
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Define: Density
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The amount of matter in a given space, or the mass per unit volume
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What is the equation for density?
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Density=Mass divided by Volume
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Define: Chemical Properties
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Properties that describe a substance based on its ability to change into a new substance with different properties
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When can Chemical Properties be observed?
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They can only be observed when one substance might become a new substance
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When does a Chemical Change occur?
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When one or more substances are changed into new substances with different properties; such changed are NOT EASILY REVERSED!
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Define: Compound
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A pure substance/homogeneous composed of two or more elements chemically combined (bonded)
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Define: Mixture
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A combination of two or more substances, each of which keeps its own characteristics and may be considered heterogeneous or homogeneous. There is no chemical change when the components of a mixture are combined
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What are some ways mixtures can be separated?
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Filtration, magnetism, centrifuge, and evaporation
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Define: Valence Electrons
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Electrons on the outermost shell or ring of the atom
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What do all chemical reactions require?
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The breaking of chemical bonds, the rearranging of atoms, and the forming of new bonds
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What are the signs of a chemical reaction?
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Color change, gas production/bubbling, formation of a solid/precipitate, energy change
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