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Unit 1: Introduction to Chemistry

Created by: E. Belcher
Horizontales
How close the measurements are to the actual, accepted value.
A pure substance that can be broken down into simple and more stable substances (elements). Made by chemically combining atoms of 2 or more elements. Ex. H2O, C6H12O6
The variable that is being tested. The "cause." Goes on the x-axis.
_______ Analysis: A technique of converting numbers into different units, without changing their value.
One substance (solute) is dissolved into another (solvent)
The study of matter.
A solution of metals
Uneven distribution, "different," components can often be seen or separate out over time (salad dressing, paint, blood)
________ Figures: The number of digits in a measurement that reflect how accurate the measurement is.
The variable that is being measured. The "effect." Goes on the y-axis.
Release of light, sudden temp. change, sudden color change, odor change, gas given off, sudden appearance of a solid: All are examples that a chemical _______ has taken place.
Anything that has mass and volume. Everything is made of it.
The building block of matter. Smallest unit of an element.
Properties the do NOT depend on the amount of matter present; "inward" properties (density, melting point, reactivity, solubility)
How close the measurements are to each other.
A pure substance that cannot be broken down into anything simpler or more stable. Found on the periodic table.
Verticales
Data based on quantities.
Scientific ______: A technique used to rewrite very large or very small numbers into a format that is easier to use.
A change of a substance into another substance; when a chemical reaction occurs (burning, rotting, oxidizing, rusting)
Mass divided by volume
A solution when a solute is dissolved in water.
Even distribution, solution, appears "blended" (lemonade, bleach, stainless steel, Kool-Aid)
The variables that are kept the same throughout all trials.
Data based on qualities
Properties that depend on the amount of matter present; "outward" boundaries (mass, volume, etc.)
A change in a substance that doesn't change its identity (boiling, freezing, vaporizing, grinding, cutting)
______ factors are ratios of equivalent values to change measurements into equivalent values with different units
_______ Substance: A fixed composition throughout, same properties throughout. Elements and Compounds Ex. He, O2, NaCl, Al
Properties that depend on the amount of matter present; "outward" boundaries (mass, volume, etc.)
Combination, variable composition throughout, each component retains its unique properties, can be separated. (saltwater, lemonade, blood, air)