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Chapter 1 notes
Notes for Chap. 1
32
Chemistry
10th Grade
09/03/2013

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Term
Chemistry
Definition
The science that investigates the structure and properties of matter
Term
Matter
Definition
Any object that takes up space and has mass
Term
Mass
Definition
How much matter object contains
Term
Properties
Definition
Characteristics and behaviors of matter including changes matter undergoes
Term
Macroscopic
Definition
Matter than is big enough to observe with tools
Term
Submicroscopic
Definition
Matter than is too small to observe with tools
Term
Scientific Model
Definition
A thinking device used to help understand and/or grasp concepts of macroscopic observations
Term
Qualitative Observations
Definition
Observations that can be made without measuremeant
Term
Quantitative Observations
Definition
Observations that require measurement
Term
Substance
Definition
Matter with the same fixed composition and properties
Term
Pure Substance
Definition
A substance that is composed of only one kind of matter
Term
Mixture
Definition
Not every particle is the same; No fixed composition
Term
Physical Change
Definition
Change in matter that does not change the identity of the substance
Term
Physical Properties
Definition
Observable and/or measurable characteristics without any change of the substances properties
Term
Heterogeneous Mixture
Definition
A mixture that does not have a uniform composition; individual substances remain distinct
Term
Homogeneous Mixture
Definition
A mixture that contains substances that combine physically but has a constant composition throughout
Term
Solution
Definition
A homogeneous mixture
Term
Alloys
Definition
Solid solutions containing metals and sometimes nonmetallic sustances (steal)
Term
Solute
Definition
The substance being dissolved
Term
Solvent
Definition
The substance that dissolves the solute
Term
Aqueous Solution
Definition
A solution where water is the solvent
Term
Element
Definition
The simplest form of matter; cannot be broken down further; pure substance
Term
Compounds
Definition
A fixed proportion of one or more elements
Term
State of Matter
Definition
Solid, Liquid, Gas,and Plasma
Term
Volatile
Definition
Substances that change to there gas form in room temperature
Term
Density
Definition
The amount of matter contained in a single unit of volume
Term
Chemical Properties
Definition
Properties that can only be observed when a change of composition occurs in the substance
Term
Chemical Change
Definition
The change of one or more substances into other substances; otherwise known as a chemical reaction
Term
Law of Conservation of Mass
Definition
Matter is neither created nor destroyed but is rearranged
Term
Energy
Definition
The capacity to do work
Term
Exothermic
Definition
Chemical reactions that give off heat energy
Term
Endothermic
Definition
Chemical reactions that absorb heat energy
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