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Chapter 1 Vocabulary

Definitions of Chapter 1 Terms

Homogeneous Mixture A mixture that has the same composition throughout
Heterogeneous Mixture A mixture that does not have uniform composition
Element A substance that can not be broken down into simpler parts
Compound A substance that can be broken down into simpler parts by a chemical change
Solution Another name for a homogeneous mixture
Solute The substance that is dissolved in a solution
Solvent The substance that does the dissolving in a solution
Alloy A type of solution where one metal is dissolved in another
Aqueous Solution A type of solution where water is the solvent
Physical Change A change that does not alter the identity or composition of matter
Chemical Change A change that results in the formation of new matter with different properties
Physical Property A description of the physical nature of matter; does not involve a change in the behavior of matter
Chemical Property A description of a behavior; this property can only be observed when matter undergoes a chemical change
Matter Anything that has mass and takes up space
Phase change A change where matter moves from one state (solid, liquid or gas) to a different state; controlled by temperature
Element The most specific and ordered class of matter
Heterogeneous Mixture The least ordered class of matter
Volume The characteristic of "taking up space"
Mass A measure of the amount of matter in an object; scientists prefer this measurement because it is constant
Weight A measure of the gravitational pull on an object; changes with position on the earth
Endothermic A type of energy change where energy must be put into (or absorbed by) the matter in a reaction
Exothermic A type of energy change where energy is released by the matter in a reaction
Hydrolysis of water An example of an endothermic reaction
Whoosh Bottle An example of an exothermic reaction
Law of Conservation of Matter Matter can never be created nor destroyed
Chemical Formula The combination of chemical symbols that describes the composition of a chemical compound
Chemical Symbol 1 or 2 letter abbreviation that represents an element
Quantitative Observation an observation that makes use of a measurement
Qualitative Observation an observation that uses word descriptions
Density A ratio between the mass and the volume of a sample of matter
Volatile The characteristic of a liquid to evaporate easily
Created by: chembaker