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25 Cards in this Set
- Front
- Back
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Theory
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More like a scientific law than a hypothesis.
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Scientific Community
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In general both a scientific theory and a scientific law are accepted to be true.
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Law
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Physical Law, Scientific Law or a Law of Nature is a scientific generalization based on empirical observations of physical behavior.
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Technology
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Using science to make stuff better.
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Metric System
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Based on water.
1 gram = 1 cm^3 = 1 mL |
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Scientific Notation
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Put a decimal after the first digit and drop the zeros.
1.23(0000) |
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Significant Figures
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-Non-Zero digits are always significant.
-Any zeros between 2 significant digits are significant. -A final zero or trailing zeros in the decimal portion only are significant. |
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Accuracy
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Error-prone and doubtful.
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Precision
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Repeatable and reproducable.
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Percent Error
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How much percent are you off from the actual amount.
(amount off) / (correct number) |
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Matter
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Anything that has mass, weight and occupies a definite space.
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Substance
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-Anything that has a fixed composition.
-It can be an element or a compound |
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Compound
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2 or more elements combined in a fixed porportion.
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Mixture
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-Not compounds.
-2 or more substances that can be seperated easily by physical means. -2 types -homogenous: looks like one thing (solution) -heterogenous: looks like many things |
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Physical Properties
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Something you can observe without changing the identity of the substances that make it up.
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Instrinsic Properties
(Intensive) (physical property) |
Don't depend on the amount of matter present.
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Extrinsic Properties
(Extensive) (physical property) |
Depend on the amount of matter present, mass, volume and thermal energy.
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Chemical Property
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The ability of a substance to combine with or changed into one or more other substances.
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Chemical Change
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Rust, Burning, Color Change, Odor, Foaming and Sizzling.
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State of Matter
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The 3 big states of matter are solid, liquid and gas.
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Solid
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Most have a specific geometric arrangements of their atoms that form when they cool.
-their properties have to do with their shape. |
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Liquid
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Occur when enough energy is transferred to the particles of a solid to allow them to overcome most of their attraction to each other
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Heat of Fusion
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To bring a solid to a melting point.
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Gas
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Takes the shape of its container but also fills the container.
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Law of Definite Porportions
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-Characteristic of compounds
-regardless of the amount, a compund is always composed of the some elements in the same portion by mass. |
